February 20, 1997


Alabama Synfuel #1, Ltd.
c/o Covol Technologies, Inc.
3280 North Frontage Road
Lehi, Utah 84043

Covol Technologies, Inc.
3280 North Frontage Road
Lehi, Utah 84043

         Re:      Letter Amendment

Gentlemen:

         Reference  is made to the  Amended  and  Restated  License  and  Binder
Purchase  Agreement,  dated as of  December  12, 1997 (the  "License  and Binder
Agreement"),  by  and  among  Alabama  Synfuel  #1,  Ltd.,  as  licensor,  Covol
Technologies, Inc., as vendor, and Birmingham Syn Fuel, LLC, as licensee.

         The  parties to the  License  and  Binder  Agreement  hereby  amend the
License and Binder Agreement as follows:

1.       Deleting the language "after consummation of the transactions under the
         Purchase Agreement upon "Substantial Completion" of the Alabama Project
         as defined in the  Construction  Contract" in Section 3.1 and replacing
         such language  with "after  Licensee has sold an aggregate of * tons of
         coal briquettes/extrusions."

2.       Deleting  the number  "*" in all  places it appears in Section  3.2 and
         replacing all such references with "*."

         This letter agreement may be executed in one or more counterparts,  all
of which shall be considered one and the same letter agreement.


                                                     Very truly yours,

                                                     BIRMINGHAM SYN FUEL, LLC

                                                     By: /s/ Reynold Roeder
                                                        ---------------------
                                                         Name: Reynold Roeder 
                                                         Title: Vice President


         * This exhibit  contains  confidential  material which has been omitted
pursuant to a  Confidential  Treatment  Request and replaced by  asterisks.  The
omitted  information has been filed  separately with the Securities and Exchange
Comission.



ACCEPTED AND AGREED TO
AS OF THE DATE FIRST SET
FORTH ABOVE:

ALABAMA SYNFUEL #1, LTD.


By:      /s/ Brent M. Cook
    -------------------------------------
Name:    Brent M. Cook
Title:   President if Its General Partner


COVOL TECHNOLOGIES, INC.


By:      /s/ Brent M. Cook
     ------------------------
Name:    Brent M. Cook
Title:   President

         * This exhibit  contains  confidential  material which has been omitted
pursuant to a  Confidential  Treatment  Request and replaced by  asterisks.  The
omitted  information has been filed  separately with the Securities and Exchange
Comission.