POWER OF ATTORNEY


                  KNOW ALL MEN BY THESE PRESENTS, that the undersigned does
hereby make, constitute and appoint Richard R. Russell, William C. Keightley,
Todd M. DuChene, Matthew Walsh and Michael R. Herman, and each of them, with
full power to act without the other, his or her true and lawful attorney-in-fact
and agent, in his or her name, place and stead to execute on his or her behalf,
as an officer and/or director of GenTek Inc. ("GenTek") and/or any of the
Subsidiary Guarantors (as defined below, and together with GenTek, the
"Registrants"), as the case may be, the Registration Statement of the
Registrants on Form S-4 (the "Registration Statement"), for the registration of
up to $200,000,000 aggregate principal amount of 11% Senior Subordinated Notes
due 2009 to be issued by GenTek and of the full and unconditional guarantee
thereof by the Subsidiary Guarantors in exchange for the existing 11% Senior
Subordinated Notes due 2009 issued by GenTek and guaranteed by the Subsidiary
Guarantors, and any and all amendments (including post-effective amendments) to
the Registration Statement, and file the same with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission (the "SEC") pursuant to the Securities Act of 1933, as amended (the
"Act"), and any and all other instruments which either of said attorneys-in-fact
and agents deem necessary or advisable to enable Registrants to comply with the
Act, the rules, regulations and requirements of the SEC in respect thereof, and
the securities or Blue Sky laws of any state or other governmental subdivision,
giving and granting to each of said attorneys-in-fact and agents full power and
authority to do and perform each and every act and thing whatsoever necessary or
appropriate to be done in and about the premises as fully to all intents as he
or she might or could do if personally present at the doing thereof, with full
power of substitution and resubstitution, hereby ratifying and confirming all
that his or her said attorney-in-fact and agents or substitutes may or shall
lawfully do or cause to be done by virtue hereof.

                  "Subsidiary Guarantors" means General Chemical Corporation,
Toledo Technologies Inc., Printing Developments Inc., Balcrank Products Inc.,
HMC Patents Holding Company Inc., Waterside Urban Renewal Corporation, Reheis
Inc., Defiance, Inc., Binderline Draftline, Inc., Defiance Precision Products,
Inc., Hy-Form Products, Inc., Defiance Testing and Engineering Services, Inc.,
Noma Corporation, PCT Mexico Corporation, Noma O.P. Inc., Electronic
Interconnect Systems Inc., Defiance Kinematics Inc., HN Investment Holdings Inc.
and PPI Holdings, Inc.

                  IN WITNESS WHEREOF, the undersigned has hereunto set his hand
on the date indicated below:




  /s/ Richard R. Russell                            November 17, 1999
- ---------------------------------------
Richard R. Russell
















                                POWER OF ATTORNEY




                  KNOW ALL MEN BY THESE PRESENTS, that the undersigned does
hereby make, constitute and appoint Richard R. Russell, William C. Keightley,
Todd M. DuChene, Matthew Walsh and Michael R. Herman, and each of them, with
full power to act without the other, his or her true and lawful attorney-in-fact
and agent, in his or her name, place and stead to execute on his or her behalf,
as an officer and/or director of GenTek Inc. ("GenTek") and/or any of the
Subsidiary Guarantors (as defined below, and together with GenTek, the
"Registrants"), as the case may be, the Registration Statement of the
Registrants on Form S-4 (the "Registration Statement"), for the registration of
up to $200,000,000 aggregate principal amount of 11% Senior Subordinated Notes
due 2009 to be issued by GenTek and of the full and unconditional guarantee
thereof by the Subsidiary Guarantors in exchange for the existing 11% Senior
Subordinated Notes due 2009 issued by GenTek and guaranteed by the Subsidiary
Guarantors, and any and all amendments (including post-effective amendments) to
the Registration Statement, and file the same with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission (the "SEC") pursuant to the Securities Act of 1933, as amended (the
"Act"), and any and all other instruments which either of said attorneys-in-fact
and agents deem necessary or advisable to enable Registrants to comply with the
Act, the rules, regulations and requirements of the SEC in respect thereof, and
the securities or Blue Sky laws of any state or other governmental subdivision,
giving and granting to each of said attorneys-in-fact and agents full power and
authority to do and perform each and every act and thing whatsoever necessary or
appropriate to be done in and about the premises as fully to all intents as he
or she might or could do if personally present at the doing thereof, with full
power of substitution and resubstitution, hereby ratifying and confirming all
that his or her said attorney-in-fact and agents or substitutes may or shall
lawfully do or cause to be done by virtue hereof.

                  "Subsidiary Guarantors" means General Chemical Corporation,
Toledo Technologies Inc., Printing Developments Inc., Balcrank Products Inc.,
HMC Patents Holding Company Inc., Waterside Urban Renewal Corporation, Reheis
Inc., Defiance, Inc., Binderline Draftline, Inc., Defiance Precision Products,
Inc., Hy-Form Products, Inc., Defiance Testing and Engineering Services, Inc.,
Noma Corporation, PCT Mexico Corporation, Noma O.P. Inc., Electronic
Interconnect Systems Inc., Defiance Kinematics Inc., HN Investment Holdings Inc.
and PPI Holdings, Inc.

                  IN WITNESS WHEREOF, the undersigned has hereunto set his hand
on the date indicated below:




 /s/ William C. Keightley                               November 17, 1999
- ---------------------------------------
William C. Keightley










                                POWER OF ATTORNEY




                  KNOW ALL MEN BY THESE PRESENTS, that the undersigned does
hereby make, constitute and appoint Richard R. Russell, William C. Keightley,
Todd M. DuChene, Matthew Walsh and Michael R. Herman, and each of them, with
full power to act without the other, his or her true and lawful attorney-in-fact
and agent, in his or her name, place and stead to execute on his or her behalf,
as an officer and/or director of GenTek Inc. ("GenTek") and/or any of the
Subsidiary Guarantors (as defined below, and together with GenTek, the
"Registrants"), as the case may be, the Registration Statement of the
Registrants on Form S-4 (the "Registration Statement"), for the registration of
up to $200,000,000 aggregate principal amount of 11% Senior Subordinated Notes
due 2009 to be issued by GenTek and of the full and unconditional guarantee
thereof by the Subsidiary Guarantors in exchange for the existing 11% Senior
Subordinated Notes due 2009 issued by GenTek and guaranteed by the Subsidiary
Guarantors, and any and all amendments (including post-effective amendments) to
the Registration Statement, and file the same with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission (the "SEC") pursuant to the Securities Act of 1933, as amended (the
"Act"), and any and all other instruments which either of said attorneys-in-fact
and agents deem necessary or advisable to enable Registrants to comply with the
Act, the rules, regulations and requirements of the SEC in respect thereof, and
the securities or Blue Sky laws of any state or other governmental subdivision,
giving and granting to each of said attorneys-in-fact and agents full power and
authority to do and perform each and every act and thing whatsoever necessary or
appropriate to be done in and about the premises as fully to all intents as he
or she might or could do if personally present at the doing thereof, with full
power of substitution and resubstitution, hereby ratifying and confirming all
that his or her said attorney-in-fact and agents or substitutes may or shall
lawfully do or cause to be done by virtue hereof.

                  "Subsidiary Guarantors" means General Chemical Corporation,
Toledo Technologies Inc., Printing Developments Inc., Balcrank Products Inc.,
HMC Patents Holding Company Inc., Waterside Urban Renewal Corporation, Reheis
Inc., Defiance, Inc., Binderline Draftline, Inc., Defiance Precision Products,
Inc., Hy-Form Products, Inc., Defiance Testing and Engineering Services, Inc.,
Noma Corporation, PCT Mexico Corporation, Noma O.P. Inc., Electronic
Interconnect Systems Inc., Defiance Kinematics Inc., HN Investment Holdings Inc.
and PPI Holdings, Inc.

                  IN WITNESS WHEREOF, the undersigned has hereunto set his hand
on the date indicated below:




 /s/ Paul M. Montrone                                  November 17, 1999
- ---------------------------------------
Paul M. Montrone












                                POWER OF ATTORNEY




                  KNOW ALL MEN BY THESE PRESENTS, that the undersigned does
hereby make, constitute and appoint Richard R. Russell, William C. Keightley,
Todd M. DuChene, Matthew Walsh and Michael R. Herman, and each of them, with
full power to act without the other, his or her true and lawful attorney-in-fact
and agent, in his or her name, place and stead to execute on his or her behalf,
as an officer and/or director of GenTek Inc. ("GenTek") and/or any of the
Subsidiary Guarantors (as defined below, and together with GenTek, the
"Registrants"), as the case may be, the Registration Statement of the
Registrants on Form S-4 (the "Registration Statement"), for the registration of
up to $200,000,000 aggregate principal amount of 11% Senior Subordinated Notes
due 2009 to be issued by GenTek and of the full and unconditional guarantee
thereof by the Subsidiary Guarantors in exchange for the existing 11% Senior
Subordinated Notes due 2009 issued by GenTek and guaranteed by the Subsidiary
Guarantors, and any and all amendments (including post-effective amendments) to
the Registration Statement, and file the same with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission (the "SEC") pursuant to the Securities Act of 1933, as amended (the
"Act"), and any and all other instruments which either of said attorneys-in-fact
and agents deem necessary or advisable to enable Registrants to comply with the
Act, the rules, regulations and requirements of the SEC in respect thereof, and
the securities or Blue Sky laws of any state or other governmental subdivision,
giving and granting to each of said attorneys-in-fact and agents full power and
authority to do and perform each and every act and thing whatsoever necessary or
appropriate to be done in and about the premises as fully to all intents as he
or she might or could do if personally present at the doing thereof, with full
power of substitution and resubstitution, hereby ratifying and confirming all
that his or her said attorney-in-fact and agents or substitutes may or shall
lawfully do or cause to be done by virtue hereof.

                  "Subsidiary Guarantors" means General Chemical Corporation,
Toledo Technologies Inc., Printing Developments Inc., Balcrank Products Inc.,
HMC Patents Holding Company Inc., Waterside Urban Renewal Corporation, Reheis
Inc., Defiance, Inc., Binderline Draftline, Inc., Defiance Precision Products,
Inc., Hy-Form Products, Inc., Defiance Testing and Engineering Services, Inc.,
Noma Corporation, PCT Mexico Corporation, Noma O.P. Inc., Electronic
Interconnect Systems Inc., Defiance Kinematics Inc., HN Investment Holdings Inc.
and PPI Holdings, Inc.

                  IN WITNESS WHEREOF, the undersigned has hereunto set his hand
on the date indicated below:




 /s/ Paul M. Meister                                 November 17, 1999
- ---------------------------------------
Paul M. Meister










                                POWER OF ATTORNEY




                  KNOW ALL MEN BY THESE PRESENTS, that the undersigned does
hereby make, constitute and appoint Richard R. Russell, William C. Keightley,
Todd M. DuChene, Matthew Walsh and Michael R. Herman, and each of them, with
full power to act without the other, his or her true and lawful attorney-in-fact
and agent, in his or her name, place and stead to execute on his or her behalf,
as an officer and/or director of GenTek Inc. ("GenTek") and/or any of the
Subsidiary Guarantors (as defined below, and together with GenTek, the
"Registrants"), as the case may be, the Registration Statement of the
Registrants on Form S-4 (the "Registration Statement"), for the registration of
up to $200,000,000 aggregate principal amount of 11% Senior Subordinated Notes
due 2009 to be issued by GenTek and of the full and unconditional guarantee
thereof by the Subsidiary Guarantors in exchange for the existing 11% Senior
Subordinated Notes due 2009 issued by GenTek and guaranteed by the Subsidiary
Guarantors, and any and all amendments (including post-effective amendments) to
the Registration Statement, and file the same with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission (the "SEC") pursuant to the Securities Act of 1933, as amended (the
"Act"), and any and all other instruments which either of said attorneys-in-fact
and agents deem necessary or advisable to enable Registrants to comply with the
Act, the rules, regulations and requirements of the SEC in respect thereof, and
the securities or Blue Sky laws of any state or other governmental subdivision,
giving and granting to each of said attorneys-in-fact and agents full power and
authority to do and perform each and every act and thing whatsoever necessary or
appropriate to be done in and about the premises as fully to all intents as he
or she might or could do if personally present at the doing thereof, with full
power of substitution and resubstitution, hereby ratifying and confirming all
that his or her said attorney-in-fact and agents or substitutes may or shall
lawfully do or cause to be done by virtue hereof.

                  "Subsidiary Guarantors" means General Chemical Corporation,
Toledo Technologies Inc., Printing Developments Inc., Balcrank Products Inc.,
HMC Patents Holding Company Inc., Waterside Urban Renewal Corporation, Reheis
Inc., Defiance, Inc., Binderline Draftline, Inc., Defiance Precision Products,
Inc., Hy-Form Products, Inc., Defiance Testing and Engineering Services, Inc.,
Noma Corporation, PCT Mexico Corporation, Noma O.P. Inc., Electronic
Interconnect Systems Inc., Defiance Kinematics Inc., HN Investment Holdings Inc.
and PPI Holdings, Inc.

                  IN WITNESS WHEREOF, the undersigned has hereunto set his hand
on the date indicated below:




 /s/ John W. Gildea                                     November 17, 1999
- ---------------------------------------
John W. Gildea











                                POWER OF ATTORNEY




                  KNOW ALL MEN BY THESE PRESENTS, that the undersigned does
hereby make, constitute and appoint Richard R. Russell, William C. Keightley,
Todd M. DuChene, Matthew Walsh and Michael R. Herman, and each of them, with
full power to act without the other, his or her true and lawful attorney-in-fact
and agent, in his or her name, place and stead to execute on his or her behalf,
as an officer and/or director of GenTek Inc. ("GenTek") and/or any of the
Subsidiary Guarantors (as defined below, and together with GenTek, the
"Registrants"), as the case may be, the Registration Statement of the
Registrants on Form S-4 (the "Registration Statement"), for the registration of
up to $200,000,000 aggregate principal amount of 11% Senior Subordinated Notes
due 2009 to be issued by GenTek and of the full and unconditional guarantee
thereof by the Subsidiary Guarantors in exchange for the existing 11% Senior
Subordinated Notes due 2009 issued by GenTek and guaranteed by the Subsidiary
Guarantors, and any and all amendments (including post-effective amendments) to
the Registration Statement, and file the same with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission (the "SEC") pursuant to the Securities Act of 1933, as amended (the
"Act"), and any and all other instruments which either of said attorneys-in-fact
and agents deem necessary or advisable to enable Registrants to comply with the
Act, the rules, regulations and requirements of the SEC in respect thereof, and
the securities or Blue Sky laws of any state or other governmental subdivision,
giving and granting to each of said attorneys-in-fact and agents full power and
authority to do and perform each and every act and thing whatsoever necessary or
appropriate to be done in and about the premises as fully to all intents as he
or she might or could do if personally present at the doing thereof, with full
power of substitution and resubstitution, hereby ratifying and confirming all
that his or her said attorney-in-fact and agents or substitutes may or shall
lawfully do or cause to be done by virtue hereof.

                  "Subsidiary Guarantors" means General Chemical Corporation,
Toledo Technologies Inc., Printing Developments Inc., Balcrank Products Inc.,
HMC Patents Holding Company Inc., Waterside Urban Renewal Corporation, Reheis
Inc., Defiance, Inc., Binderline Draftline, Inc., Defiance Precision Products,
Inc., Hy-Form Products, Inc., Defiance Testing and Engineering Services, Inc.,
Noma Corporation, PCT Mexico Corporation, Noma O.P. Inc., Electronic
Interconnect Systems Inc., Defiance Kinematics Inc., HN Investment Holdings Inc.
and PPI Holdings, Inc.

                  IN WITNESS WHEREOF, the undersigned has hereunto set his hand
on the date indicated below:




 /s/ Scott M. Sperling                                  November 17, 1999
- ---------------------------------------
Scott M. Sperling










                                POWER OF ATTORNEY




                  KNOW ALL MEN BY THESE PRESENTS, that the undersigned does
hereby make, constitute and appoint Richard R. Russell, William C. Keightley,
Todd M. DuChene, Matthew Walsh and Michael R. Herman, and each of them, with
full power to act without the other, his or her true and lawful attorney-in-fact
and agent, in his or her name, place and stead to execute on his or her behalf,
as an officer and/or director of GenTek Inc. ("GenTek") and/or any of the
Subsidiary Guarantors (as defined below, and together with GenTek, the
"Registrants"), as the case may be, the Registration Statement of the
Registrants on Form S-4 (the "Registration Statement"), for the registration of
up to $200,000,000 aggregate principal amount of 11% Senior Subordinated Notes
due 2009 to be issued by GenTek and of the full and unconditional guarantee
thereof by the Subsidiary Guarantors in exchange for the existing 11% Senior
Subordinated Notes due 2009 issued by GenTek and guaranteed by the Subsidiary
Guarantors, and any and all amendments (including post-effective amendments) to
the Registration Statement, and file the same with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission (the "SEC") pursuant to the Securities Act of 1933, as amended (the
"Act"), and any and all other instruments which either of said attorneys-in-fact
and agents deem necessary or advisable to enable Registrants to comply with the
Act, the rules, regulations and requirements of the SEC in respect thereof, and
the securities or Blue Sky laws of any state or other governmental subdivision,
giving and granting to each of said attorneys-in-fact and agents full power and
authority to do and perform each and every act and thing whatsoever necessary or
appropriate to be done in and about the premises as fully to all intents as he
or she might or could do if personally present at the doing thereof, with full
power of substitution and resubstitution, hereby ratifying and confirming all
that his or her said attorney-in-fact and agents or substitutes may or shall
lawfully do or cause to be done by virtue hereof.

                  "Subsidiary Guarantors" means General Chemical Corporation,
Toledo Technologies Inc., Printing Developments Inc., Balcrank Products Inc.,
HMC Patents Holding Company Inc., Waterside Urban Renewal Corporation, Reheis
Inc., Defiance, Inc., Binderline Draftline, Inc., Defiance Precision Products,
Inc., Hy-Form Products, Inc., Defiance Testing and Engineering Services, Inc.,
Noma Corporation, PCT Mexico Corporation, Noma O.P. Inc., Electronic
Interconnect Systems Inc., Defiance Kinematics Inc., HN Investment Holdings Inc.
and PPI Holdings, Inc.

                  IN WITNESS WHEREOF, the undersigned has hereunto set his hand
on the date indicated below:




 /s/ Ira Stepanian                                        November 17, 1999
- ---------------------------------------
Ira Stepanian










                                POWER OF ATTORNEY




                  KNOW ALL MEN BY THESE PRESENTS, that the undersigned does
hereby make, constitute and appoint Richard R. Russell, William C. Keightley,
Todd M. DuChene, Matthew Walsh and Michael R. Herman, and each of them, with
full power to act without the other, his or her true and lawful attorney-in-fact
and agent, in his or her name, place and stead to execute on his or her behalf,
as an officer and/or director of GenTek Inc. ("GenTek") and/or any of the
Subsidiary Guarantors (as defined below, and together with GenTek, the
"Registrants"), as the case may be, the Registration Statement of the
Registrants on Form S-4 (the "Registration Statement"), for the registration of
up to $200,000,000 aggregate principal amount of 11% Senior Subordinated Notes
due 2009 to be issued by GenTek and of the full and unconditional guarantee
thereof by the Subsidiary Guarantors in exchange for the existing 11% Senior
Subordinated Notes due 2009 issued by GenTek and guaranteed by the Subsidiary
Guarantors, and any and all amendments (including post-effective amendments) to
the Registration Statement, and file the same with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission (the "SEC") pursuant to the Securities Act of 1933, as amended (the
"Act"), and any and all other instruments which either of said attorneys-in-fact
and agents deem necessary or advisable to enable Registrants to comply with the
Act, the rules, regulations and requirements of the SEC in respect thereof, and
the securities or Blue Sky laws of any state or other governmental subdivision,
giving and granting to each of said attorneys-in-fact and agents full power and
authority to do and perform each and every act and thing whatsoever necessary or
appropriate to be done in and about the premises as fully to all intents as he
or she might or could do if personally present at the doing thereof, with full
power of substitution and resubstitution, hereby ratifying and confirming all
that his or her said attorney-in-fact and agents or substitutes may or shall
lawfully do or cause to be done by virtue hereof.

                  "Subsidiary Guarantors" means General Chemical Corporation,
Toledo Technologies Inc., Printing Developments Inc., Balcrank Products Inc.,
HMC Patents Holding Company Inc., Waterside Urban Renewal Corporation, Reheis
Inc., Defiance, Inc., Binderline Draftline, Inc., Defiance Precision Products,
Inc., Hy-Form Products, Inc., Defiance Testing and Engineering Services, Inc.,
Noma Corporation, PCT Mexico Corporation, Noma O.P. Inc., Electronic
Interconnect Systems Inc., Defiance Kinematics Inc., HN Investment Holdings Inc.
and PPI Holdings, Inc.

                  IN WITNESS WHEREOF, the undersigned has hereunto set his hand
on the date indicated below:


 /s/ Bruce Koepfgen                                      November 17, 1999
- ---------------------------------------
Bruce Koepfgen











                                POWER OF ATTORNEY




                  KNOW ALL MEN BY THESE PRESENTS, that the undersigned does
hereby make, constitute and appoint Richard R. Russell, William C. Keightley,
Todd M. DuChene, Matthew Walsh and Michael R. Herman, and each of them, with
full power to act without the other, his or her true and lawful attorney-in-fact
and agent, in his or her name, place and stead to execute on his or her behalf,
as an officer and/or director of GenTek Inc. ("GenTek") and/or any of the
Subsidiary Guarantors (as defined below, and together with GenTek, the
"Registrants"), as the case may be, the Registration Statement of the
Registrants on Form S-4 (the "Registration Statement"), for the registration of
up to $200,000,000 aggregate principal amount of 11% Senior Subordinated Notes
due 2009 to be issued by GenTek and of the full and unconditional guarantee
thereof by the Subsidiary Guarantors in exchange for the existing 11% Senior
Subordinated Notes due 2009 issued by GenTek and guaranteed by the Subsidiary
Guarantors, and any and all amendments (including post-effective amendments) to
the Registration Statement, and file the same with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission (the "SEC") pursuant to the Securities Act of 1933, as amended (the
"Act"), and any and all other instruments which either of said attorneys-in-fact
and agents deem necessary or advisable to enable Registrants to comply with the
Act, the rules, regulations and requirements of the SEC in respect thereof, and
the securities or Blue Sky laws of any state or other governmental subdivision,
giving and granting to each of said attorneys-in-fact and agents full power and
authority to do and perform each and every act and thing whatsoever necessary or
appropriate to be done in and about the premises as fully to all intents as he
or she might or could do if personally present at the doing thereof, with full
power of substitution and resubstitution, hereby ratifying and confirming all
that his or her said attorney-in-fact and agents or substitutes may or shall
lawfully do or cause to be done by virtue hereof.

                  "Subsidiary Guarantors" means General Chemical Corporation,
Toledo Technologies Inc., Printing Developments Inc., Balcrank Products Inc.,
HMC Patents Holding Company Inc., Waterside Urban Renewal Corporation, Reheis
Inc., Defiance, Inc., Binderline Draftline, Inc., Defiance Precision Products,
Inc., Hy-Form Products, Inc., Defiance Testing and Engineering Services, Inc.,
Noma Corporation, PCT Mexico Corporation, Noma O.P. Inc., Electronic
Interconnect Systems Inc., Defiance Kinematics Inc., HN Investment Holdings Inc.
and PPI Holdings, Inc.

                  IN WITNESS WHEREOF, the undersigned has hereunto set his hand
on the date indicated below:




 /s/ Ralph M. Passino                                       November 17, 1999
- ---------------------------------------
Ralph M. Passino













                                POWER OF ATTORNEY




                  KNOW ALL MEN BY THESE PRESENTS, that the undersigned does
hereby make, constitute and appoint Richard R. Russell, William C. Keightley,
Todd M. DuChene, Matthew Walsh and Michael R. Herman, and each of them, with
full power to act without the other, his or her true and lawful attorney-in-fact
and agent, in his or her name, place and stead to execute on his or her behalf,
as an officer and/or director of GenTek Inc. ("GenTek") and/or any of the
Subsidiary Guarantors (as defined below, and together with GenTek, the
"Registrants"), as the case may be, the Registration Statement of the
Registrants on Form S-4 (the "Registration Statement"), for the registration of
up to $200,000,000 aggregate principal amount of 11% Senior Subordinated Notes
due 2009 to be issued by GenTek and of the full and unconditional guarantee
thereof by the Subsidiary Guarantors in exchange for the existing 11% Senior
Subordinated Notes due 2009 issued by GenTek and guaranteed by the Subsidiary
Guarantors, and any and all amendments (including post-effective amendments) to
the Registration Statement, and file the same with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission (the "SEC") pursuant to the Securities Act of 1933, as amended (the
"Act"), and any and all other instruments which either of said attorneys-in-fact
and agents deem necessary or advisable to enable Registrants to comply with the
Act, the rules, regulations and requirements of the SEC in respect thereof, and
the securities or Blue Sky laws of any state or other governmental subdivision,
giving and granting to each of said attorneys-in-fact and agents full power and
authority to do and perform each and every act and thing whatsoever necessary or
appropriate to be done in and about the premises as fully to all intents as he
or she might or could do if personally present at the doing thereof, with full
power of substitution and resubstitution, hereby ratifying and confirming all
that his or her said attorney-in-fact and agents or substitutes may or shall
lawfully do or cause to be done by virtue hereof.

                  "Subsidiary Guarantors" means General Chemical Corporation,
Toledo Technologies Inc., Printing Developments Inc., Balcrank Products Inc.,
HMC Patents Holding Company Inc., Waterside Urban Renewal Corporation, Reheis
Inc., Defiance, Inc., Binderline Draftline, Inc., Defiance Precision Products,
Inc., Hy-Form Products, Inc., Defiance Testing and Engineering Services, Inc.,
Noma Corporation, PCT Mexico Corporation, Noma O.P. Inc., Electronic
Interconnect Systems Inc., Defiance Kinematics Inc., HN Investment Holdings Inc.
and PPI Holdings, Inc.

                  IN WITNESS WHEREOF, the undersigned has hereunto set his hand
on the date indicated below:




 /s/ Paul Kessler                              November 17, 1999
- -------------------------------
Paul Kessler










                                POWER OF ATTORNEY




                  KNOW ALL MEN BY THESE PRESENTS, that the undersigned does
hereby make, constitute and appoint Richard R. Russell, William C. Keightley,
Todd M. DuChene, Matthew Walsh and Michael R. Herman, and each of them, with
full power to act without the other, his or her true and lawful attorney-in-fact
and agent, in his or her name, place and stead to execute on his or her behalf,
as an officer and/or director of GenTek Inc. ("GenTek") and/or any of the
Subsidiary Guarantors (as defined below, and together with GenTek, the
"Registrants"), as the case may be, the Registration Statement of the
Registrants on Form S-4 (the "Registration Statement"), for the registration of
up to $200,000,000 aggregate principal amount of 11% Senior Subordinated Notes
due 2009 to be issued by GenTek and of the full and unconditional guarantee
thereof by the Subsidiary Guarantors in exchange for the existing 11% Senior
Subordinated Notes due 2009 issued by GenTek and guaranteed by the Subsidiary
Guarantors, and any and all amendments (including post-effective amendments) to
the Registration Statement, and file the same with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission (the "SEC") pursuant to the Securities Act of 1933, as amended (the
"Act"), and any and all other instruments which either of said attorneys-in-fact
and agents deem necessary or advisable to enable Registrants to comply with the
Act, the rules, regulations and requirements of the SEC in respect thereof, and
the securities or Blue Sky laws of any state or other governmental subdivision,
giving and granting to each of said attorneys-in-fact and agents full power and
authority to do and perform each and every act and thing whatsoever necessary or
appropriate to be done in and about the premises as fully to all intents as he
or she might or could do if personally present at the doing thereof, with full
power of substitution and resubstitution, hereby ratifying and confirming all
that his or her said attorney-in-fact and agents or substitutes may or shall
lawfully do or cause to be done by virtue hereof.

                  "Subsidiary Guarantors" means General Chemical Corporation,
Toledo Technologies Inc., Printing Developments Inc., Balcrank Products Inc.,
HMC Patents Holding Company Inc., Waterside Urban Renewal Corporation, Reheis
Inc., Defiance, Inc., Binderline Draftline, Inc., Defiance Precision Products,
Inc., Hy-Form Products, Inc., Defiance Testing and Engineering Services, Inc.,
Noma Corporation, PCT Mexico Corporation, Noma O.P. Inc., Electronic
Interconnect Systems Inc., Defiance Kinematics Inc., HN Investment Holdings Inc.
and PPI Holdings, Inc.

                  IN WITNESS WHEREOF, the undersigned has hereunto set his hand
on the date indicated below:




 /s/ James N. Tanis                                   November 17, 1999
- -------------------------------
James N. Tanis










                                POWER OF ATTORNEY




                  KNOW ALL MEN BY THESE PRESENTS, that the undersigned does
hereby make, constitute and appoint Richard R. Russell, William C. Keightley,
Todd M. DuChene, Matthew Walsh and Michael R. Herman, and each of them, with
full power to act without the other, his or her true and lawful attorney-in-fact
and agent, in his or her name, place and stead to execute on his or her behalf,
as an officer and/or director of GenTek Inc. ("GenTek") and/or any of the
Subsidiary Guarantors (as defined below, and together with GenTek, the
"Registrants"), as the case may be, the Registration Statement of the
Registrants on Form S-4 (the "Registration Statement"), for the registration of
up to $200,000,000 aggregate principal amount of 11% Senior Subordinated Notes
due 2009 to be issued by GenTek and of the full and unconditional guarantee
thereof by the Subsidiary Guarantors in exchange for the existing 11% Senior
Subordinated Notes due 2009 issued by GenTek and guaranteed by the Subsidiary
Guarantors, and any and all amendments (including post-effective amendments) to
the Registration Statement, and file the same with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission (the "SEC") pursuant to the Securities Act of 1933, as amended (the
"Act"), and any and all other instruments which either of said attorneys-in-fact
and agents deem necessary or advisable to enable Registrants to comply with the
Act, the rules, regulations and requirements of the SEC in respect thereof, and
the securities or Blue Sky laws of any state or other governmental subdivision,
giving and granting to each of said attorneys-in-fact and agents full power and
authority to do and perform each and every act and thing whatsoever necessary or
appropriate to be done in and about the premises as fully to all intents as he
or she might or could do if personally present at the doing thereof, with full
power of substitution and resubstitution, hereby ratifying and confirming all
that his or her said attorney-in-fact and agents or substitutes may or shall
lawfully do or cause to be done by virtue hereof.

                  "Subsidiary Guarantors" means General Chemical Corporation,
Toledo Technologies Inc., Printing Developments Inc., Balcrank Products Inc.,
HMC Patents Holding Company Inc., Waterside Urban Renewal Corporation, Reheis
Inc., Defiance, Inc., Binderline Draftline, Inc., Defiance Precision Products,
Inc., Hy-Form Products, Inc., Defiance Testing and Engineering Services, Inc.,
Noma Corporation, PCT Mexico Corporation, Noma O.P. Inc., Electronic
Interconnect Systems Inc., Defiance Kinematics Inc., HN Investment Holdings Inc.
and PPI Holdings, Inc.

                  IN WITNESS WHEREOF, the undersigned has hereunto set his hand
on the date indicated below:




 /s/ Matthew Walsh                                    November 17, 1999
- -------------------------------
Matthew Walsh










                                POWER OF ATTORNEY




                  KNOW ALL MEN BY THESE PRESENTS, that the undersigned does
hereby make, constitute and appoint Richard R. Russell, William C. Keightley,
Todd M. DuChene, Matthew Walsh and Michael R. Herman, and each of them, with
full power to act without the other, his or her true and lawful attorney-in-fact
and agent, in his or her name, place and stead to execute on his or her behalf,
as an officer and/or director of GenTek Inc. ("GenTek") and/or any of the
Subsidiary Guarantors (as defined below, and together with GenTek, the
"Registrants"), as the case may be, the Registration Statement of the
Registrants on Form S-4 (the "Registration Statement"), for the registration of
up to $200,000,000 aggregate principal amount of 11% Senior Subordinated Notes
due 2009 to be issued by GenTek and of the full and unconditional guarantee
thereof by the Subsidiary Guarantors in exchange for the existing 11% Senior
Subordinated Notes due 2009 issued by GenTek and guaranteed by the Subsidiary
Guarantors, and any and all amendments (including post-effective amendments) to
the Registration Statement, and file the same with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission (the "SEC") pursuant to the Securities Act of 1933, as amended (the
"Act"), and any and all other instruments which either of said attorneys-in-fact
and agents deem necessary or advisable to enable Registrants to comply with the
Act, the rules, regulations and requirements of the SEC in respect thereof, and
the securities or Blue Sky laws of any state or other governmental subdivision,
giving and granting to each of said attorneys-in-fact and agents full power and
authority to do and perform each and every act and thing whatsoever necessary or
appropriate to be done in and about the premises as fully to all intents as he
or she might or could do if personally present at the doing thereof, with full
power of substitution and resubstitution, hereby ratifying and confirming all
that his or her said attorney-in-fact and agents or substitutes may or shall
lawfully do or cause to be done by virtue hereof.

                  "Subsidiary Guarantors" means General Chemical Corporation,
Toledo Technologies Inc., Printing Developments Inc., Balcrank Products Inc.,
HMC Patents Holding Company Inc., Waterside Urban Renewal Corporation, Reheis
Inc., Defiance, Inc., Binderline Draftline, Inc., Defiance Precision Products,
Inc., Hy-Form Products, Inc., Defiance Testing and Engineering Services, Inc.,
Noma Corporation, PCT Mexico Corporation, Noma O.P. Inc., Electronic
Interconnect Systems Inc., Defiance Kinematics Inc., HN Investment Holdings Inc.
and PPI Holdings, Inc.

                  IN WITNESS WHEREOF, the undersigned has hereunto set his hand
on the date indicated below:




 /s/ Todd M. DuChene                                  November 17, 1999
- -------------------------------
Todd M. DuChene










                                POWER OF ATTORNEY



                  KNOW ALL MEN BY THESE PRESENTS, that the undersigned does
hereby make, constitute and appoint Richard R. Russell, William C. Keightley,
Todd M. DuChene, Matthew Walsh and Michael R. Herman, and each of them, with
full power to act without the other, his or her true and lawful attorney-in-fact
and agent, in his or her name, place and stead to execute on his or her behalf,
as an officer and/or director of GenTek Inc. ("GenTek") and/or any of the
Subsidiary Guarantors (as defined below, and together with GenTek, the
"Registrants"), as the case may be, the Registration Statement of the
Registrants on Form S-4 (the "Registration Statement"), for the registration of
up to $200,000,000 aggregate principal amount of 11% Senior Subordinated Notes
due 2009 to be issued by GenTek and of the full and unconditional guarantee
thereof by the Subsidiary Guarantors in exchange for the existing 11% Senior
Subordinated Notes due 2009 issued by GenTek and guaranteed by the Subsidiary
Guarantors, and any and all amendments (including post-effective amendments) to
the Registration Statement, and file the same with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission (the "SEC") pursuant to the Securities Act of 1933, as amended (the
"Act"), and any and all other instruments which either of said attorneys-in-fact
and agents deem necessary or advisable to enable Registrants to comply with the
Act, the rules, regulations and requirements of the SEC in respect thereof, and
the securities or Blue Sky laws of any state or other governmental subdivision,
giving and granting to each of said attorneys-in-fact and agents full power and
authority to do and perform each and every act and thing whatsoever necessary or
appropriate to be done in and about the premises as fully to all intents as he
or she might or could do if personally present at the doing thereof, with full
power of substitution and resubstitution, hereby ratifying and confirming all
that his or her said attorney-in-fact and agents or substitutes may or shall
lawfully do or cause to be done by virtue hereof.

                  "Subsidiary Guarantors" means General Chemical Corporation,
Toledo Technologies Inc., Printing Developments Inc., Balcrank Products Inc.,
HMC Patents Holding Company Inc., Waterside Urban Renewal Corporation, Reheis
Inc., Defiance, Inc., Binderline Draftline, Inc., Defiance Precision Products,
Inc., Hy-Form Products, Inc., Defiance Testing and Engineering Services, Inc.,
Noma Corporation, PCT Mexico Corporation, Noma O.P. Inc., Electronic
Interconnect Systems Inc., Defiance Kinematics Inc., HN Investment Holdings Inc.
and PPI Holdings, Inc.

                  IN WITNESS WHEREOF, the undersigned has hereunto set his hand
on the date indicated below:




 /s/ Bodo B. Klink                                     November 17, 1999
- -------------------------------
Bodo B. Klink












                                POWER OF ATTORNEY




                  KNOW ALL MEN BY THESE PRESENTS, that the undersigned does
hereby make, constitute and appoint Richard R. Russell, William C. Keightley,
Todd M. DuChene, Matthew Walsh and Michael R. Herman, and each of them, with
full power to act without the other, his or her true and lawful attorney-in-fact
and agent, in his or her name, place and stead to execute on his or her behalf,
as an officer and/or director of GenTek Inc. ("GenTek") and/or any of the
Subsidiary Guarantors (as defined below, and together with GenTek, the
"Registrants"), as the case may be, the Registration Statement of the
Registrants on Form S-4 (the "Registration Statement"), for the registration of
up to $200,000,000 aggregate principal amount of 11% Senior Subordinated Notes
due 2009 to be issued by GenTek and of the full and unconditional guarantee
thereof by the Subsidiary Guarantors in exchange for the existing 11% Senior
Subordinated Notes due 2009 issued by GenTek and guaranteed by the Subsidiary
Guarantors, and any and all amendments (including post-effective amendments) to
the Registration Statement, and file the same with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission (the "SEC") pursuant to the Securities Act of 1933, as amended (the
"Act"), and any and all other instruments which either of said attorneys-in-fact
and agents deem necessary or advisable to enable Registrants to comply with the
Act, the rules, regulations and requirements of the SEC in respect thereof, and
the securities or Blue Sky laws of any state or other governmental subdivision,
giving and granting to each of said attorneys-in-fact and agents full power and
authority to do and perform each and every act and thing whatsoever necessary or
appropriate to be done in and about the premises as fully to all intents as he
or she might or could do if personally present at the doing thereof, with full
power of substitution and resubstitution, hereby ratifying and confirming all
that his or her said attorney-in-fact and agents or substitutes may or shall
lawfully do or cause to be done by virtue hereof.

                  "Subsidiary Guarantors" means General Chemical Corporation,
Toledo Technologies Inc., Printing Developments Inc., Balcrank Products Inc.,
HMC Patents Holding Company Inc., Waterside Urban Renewal Corporation, Reheis
Inc., Defiance, Inc., Binderline Draftline, Inc., Defiance Precision Products,
Inc., Hy-Form Products, Inc., Defiance Testing and Engineering Services, Inc.,
Noma Corporation, PCT Mexico Corporation, Noma O.P. Inc., Electronic
Interconnect Systems Inc., Defiance Kinematics Inc., HN Investment Holdings Inc.
and PPI Holdings, Inc.

                  IN WITNESS WHEREOF, the undersigned has hereunto set his hand
on the date indicated below:




 /s/ Grant Crandall                                 November 17, 1999
- -------------------------------
Grant Crandall