FIRST AMENDMENT
                                       TO
                                 LEASE AGREEMENT

     This First Amendment to Lease Agreement (this  "Agreement") is entered into
the 14th day of May, 1996 (the "Effective Date"),  between GENEVA STEEL COMPANY,
a Utah  corporation  ("Landlord")  and  COVOL  TECHNOLOGIES,  INC.,  a  Delaware
corporation   formerly  doing  business  as  Environmental   Technologies  Group
International, Inc. ("Tenant").

                                    Recitals:

         A. Landlord and Tenant entered into a certain Lease Agreement dated May
12, 1995, (the "Lease Agreement'),  wherein Tenant agreed to lease from Landlord
certain  Premises  located  in Utah  County,  as such  Premises  are more  fully
described in the Lease Agreement

         B.  The parties desire to amend the Lease Agreement as provided herein.

                                   Amendment:

         NOW,  THEREFORE,  in  consideration  of the promises and  covenants set
forth  herein,  and for other good and valuable  consideration,  the receipt and
sufficiency of which are hereby acknowledged, Tenant and Landlord agree to amend
the Lease Agreement as follows:

         1.       Definitions.  The  capitalized  terms  used  in this Amendment
shall have the same meanings ascribed in such terms in the Lease Agreement.

         2.       Services Agreement.  From  and  after  the Effective Date, the
"Services Agreement" referred to in Article I of the Lease Agreement shall refer
to that certain Amended and Restated  Briquetting Services Agreement dated as of
May 14, 1996.

         3.       Maintenance of Premises.  The last sentence of Section 6.02 of
the  Lease  Agreement  is  hereby  deleted  in its  entirety  and the  following
substituted in lieu thereof:

                  Landlord  shall have no  obligation  to repair or maintain the
                  Premises,  Landlord's  obligation  being limited solely to the
                  payment of any Fee due  pursuant to Section 5 of the  Services
                  Agreement.

         4.       Utilities.  The  reference to "Section 6" in the first line of
Article VIII of the Lease Agreement is hereby changes to refer to "Section 10."


                                       




         5.       Entire  Agreement.  The  phrase  "and  the  Technology  Rights
Agreement  referred to therein," in the first  sentence of Section  17.02 of the
Lease Agreement is hereby deleted.

         6.       Notices.  Section  22 of the Lease Agreement is hereby amended
to provide that  notices to Tenant  shall be sent in the manner  provided in the
Lease Agreement addressed as follows:

                  Steven Brown
                  COVOL Technologies, Inc.
                  3280 North Frontage Road
                  Lehi, Utah 84043
                  Telecopier No.: 768-4483

         7. Benefit.  This  Amendment  is  for  the  sole benefit of the parties
hereto and shall not be for the benefit or  enforceable  by any other  person or
entity.

         8. Ratification.  Except  as  specifically modified herein, the parties
hereby ratify and reaffirm the terms, conditions,  warranties and guarantees set
forth in the Lease Agreement.

         IN WITNESS  WHEREOF,  the  parties  have caused  this  Amendment  to be
executed as of the day and year first above written.

                             "Tenant"

                                      COVOL   TECHNOLOGIES,   INC.,  a  Delaware
                                      corporation      formerly     known     as
                                      Environmental Technologies  International,
                                      Inc.


                                      By  /s/ Ken Young
                                      Its President

                            "Landlord"

                                      GENEVA STEEL COMPANY, a Utah
                                      corporation


                                      By  /s/ Max Sorenson
                                      Its Sr. Vice President Engineering &
                                          Technology