<PAGE>
                                                                   Exhibit 10-10

                           EIGHTH AMENDMENT AGREEMENT

        THIS EIGHTH AMENDMENT AGREEMENT ("Agreement") is made as of the 20th day
of September, 2002, by and among BANK ONE, NA (fka Bank One, Akron, NA)
("Lender"), LEXINGTON PRECISION CORPORATION, a Delaware corporation ("LPC"), and
LEXINGTON RUBBER GROUP, INC. (FKA LEXINGTON COMPONENTS, INC.), a Delaware
corporation ("LRG", hereinafter LPC and LRG are referred to each as "Borrower"
singularly and referred to jointly and severally as "Borrowers", which term
shall mean each of the companies individually and both of the companies
collectively).

        WHEREAS, Borrowers and Lender are parties to a certain Credit Facility
and Security Agreement, including Rider A thereto, dated as of January 31, 1997,
as amended and as it may from time to time be further amended, supplemented or
otherwise modified, which provides for certain credit facilities all upon the
terms and conditions set forth therein ("Credit and Security Agreement");

        WHEREAS, Borrowers and Lender desire to amend the Credit and Security
Agreement to modify certain provisions thereof; and

        WHEREAS, each term used herein shall be defined in accordance with the
Credit and Security Agreement.

        NOW, THEREFORE, in consideration of the premises and of the mutual
covenants herein and for other valuable considerations, Borrowers and Lender
agree as follows:

        1. Section 2(B)(2)(b) of the Credit and Security Agreement is hereby
deleted in its entirety with the following being inserted in place thereof:

                       (b) Fixed Principal Installments. Subject otherwise to
               the terms and provisions of the North Canton Term Note, the
               principal balance of the North Canton Term Loan shall be payable
               in one (1) installment of ELEVEN THOUSAND ONE HUNDRED ELEVEN AND
               11/100 DOLLARS ($11,111.11), on October 1, 2002 with the balance
               thereof payable in full on November 1, 2002.

        2. Section 2(C)(2)(b) of the Credit and Security Agreement is hereby
deleted in its entirety with the following being inserted in place thereof:

                       (b) Fixed Principal Installments. Subject otherwise to
               the terms and provisions of the Vienna Term Note, the principal
               balance of the Vienna Term Loan shall be payable in one (1)
               installments of EIGHT THOUSAND THREE HUNDRED THIRTY THREE AND
               33/100 DOLLARS ($8,333.33), on October 1, 2002 with the balance
               thereof payable in full on November 1, 2002.

        3. Section 2(D)(2) of the Credit and Security Agreement is hereby
deleted in its entirety with the following being inserted in place thereof:


<PAGE>
               2. CASA GRANDE TERM LOAN. At the end of the Casa Grande
        Commitment Period, the Casa Grande Construction Loans automatically
        converted to a term loan (the "Casa Grande Term Loan"). The Casa Grande
        Note shall evidence the Casa Grande Term Loan. The Casa Grande Term Loan
        shall be payable in one (1) principal installment of SIXTEEN THOUSAND
        SIX HUNDRED SIXTY-SIX AND 00/100 DOLLARS ($16,666.00), together with all
        accrued interest due at the time of payment of principal, on October 1,
        2002 with the balance thereof payable in full on November 1, 2002. The
        Casa Grande Term Loan shall bear interest on the unpaid principal
        balance at a rate per annum equal to the Base Rate plus three-fourths of
        one percent (_%). Such interest is payable monthly commencing on October
        1, 2002 and continuing on the first day of each calendar month
        thereafter. Interest shall be computed on a three hundred sixty
        (360)-day basis based upon the actual number of days elapsed.

        4. Section 2(E)(2)(b) of the Credit and Security Agreement is hereby
deleted in its entirety with the following being inserted in place thereof:

                       (b) Fixed Principal Installments. Subject otherwise to
               the terms and provisions of the LaGrange Term Note, the principal
               balance of the LaGrange Term Loan shall be payable in one (1)
               installment of EIGHT THOUSAND EIGHT HUNDRED EIGHTY-EIGHT AND
               89/100 DOLLARS ($8,888.89), on October 1, 2002 with the balance
               thereof payable in full on November 1, 2002.

        5. As a condition precedent to the effectiveness of this Agreement,
Borrowers shall pay all reasonable legal fees and expenses of Lender incurred in
connection with this Agreement.

        6. Borrowers hereby represent and warrant to Lender that (a) each
Borrower has the legal power and authority to execute and deliver this
Agreement; (b) this Agreement has been duly executed and delivered by each
Borrower; (c) the execution and delivery hereof by each Borrower and the
performance and observance by each Borrower of the provisions hereof do not
violate or conflict with the organizational documents of such Borrower or any
law applicable to such Borrower or result in a breach of any provision of or
constitute a default under any other agreement, instrument or document binding
upon or enforceable against such Borrower; (d) as of the date hereof, and after
giving effect to the transactions contemplated by this Agreement, each Borrower
is able to pay its debts as they mature and each Borrower's capital is
sufficient and not unreasonably small for the business and transaction in which
such Borrower is engaged or about to engage; (e) no Default or Event of Default
exists under the Credit and Security Agreement, nor will a Default or Event of
Default occur upon the execution and delivery of this Agreement; and (f) this
Agreement has been duly authorized, executed, and delivered by each Borrower and
constitutes a legal, valid and binding obligation of each Borrower, enforceable
in accordance with its terms.

        7. Each reference that is made in the Credit and Security Agreement or
any other writing shall hereafter be construed as a reference to the Credit and
Security Agreement as amended hereby. Except as herein otherwise specifically
provided, all provisions of the Credit


                                       2


<PAGE>
and Security Agreement shall remain in full force and effect in accordance with
their terms and shall not be amended or modified hereby.

        8. This Agreement may be executed in any number of counterparts and by
different parties hereto in separate counterparts and by facsimile signature,
each of which when so executed and delivered shall be deemed to be an original
and all of which taken together shall constitute but one and the same agreement.

        9. THIS AGREEMENT AND THE NOTES SHALL BE GOVERNED BY, AND CONSTRUED AND
INTERPRETED IN ACCORDANCE WITH, THE INTERNAL LAWS OF THE STATE OF OHIO. EXCEPT
AS OTHERWISE PROVIDED FOR IN THIS AGREEMENT OR AS REQUIRED BY APPLICABLE LAW,
EACH BORROWER WAIVES (i) PRESENTMENT, DEMAND AND PROTEST AND NOTICE OF
PRESENTMENT, PROTEST, DEFAULT, NONPAYMENT, MATURITY, RELEASE, COMPROMISE,
SETTLEMENT, EXTENSION OR RENEWAL OF ANY OR ALL COMMERCIAL PAPER, ACCOUNTS,
CONTRACT RIGHTS, DOCUMENTS, INSTRUMENTS, CHATTEL PAPER AND GUARANTIES AT ANY
TIME HELD BY LENDER ON WHICH ANY BORROWER MAY IN ANY WAY BE LIABLE, (ii) NOTICE
PRIOR TO TAKING POSSESSION OR CONTROL OF THE COLLATERAL WHICH MIGHT BE REQUIRED
BY ANY COURT PRIOR TO ALLOWING LENDER TO EXERCISE ANY OF LENDER'S REMEDIES AND
(iii) ITS RIGHT TO A JURY TRIAL IN THE EVENT OF ANY LITIGATION INSTITUTED IN
RESPECT OF THIS AGREEMENT, THE NOTES OR ANY OF THE OTHER CREDIT DOCUMENTS. EACH
BORROWER ACKNOWLEDGES THAT IT HAS BEEN ADVISED BY COUNSEL OF ITS CHOICE WITH
RESPECT TO THIS AGREEMENT AND THE TRANSACTIONS EVIDENCED BY THIS AGREEMENT. EACH
BORROWER HEREBY IRREVOCABLY CONSENTS AND AGREES THAT ANY LEGAL ACTION IN
CONNECTION WITH THIS AGREEMENT MAY BE INSTITUTED IN THE COURTS OF THE STATE OF
OHIO, IN THE COUNTY OF STARK OR THE UNITED STATES COURTS FOR THE NORTHERN
DISTRICT OF OHIO, AS LENDER MAY ELECT, AND BY EXECUTION AND DELIVERY OF THIS
AGREEMENT, EACH BORROWER HEREBY IRREVOCABLY ACCEPTS AND SUBMITS TO, FOR ITSELF
AND IN RESPECT OF ITS PROPERTY, THE NON-EXCLUSIVE JURISDICTION OF ANY SUCH
COURT, AND TO ALL PROCEEDINGS IN SUCH COURTS. BORROWERS AND LENDER ACKNOWLEDGE
THAT JURY TRIALS OFTEN ENTAIL ADDITIONAL EXPENSES AND DELAYS NOT OCCASIONED BY
NON-JURY TRIALS. BORROWERS AND LENDER AGREE AND STIPULATE THAT A FAIR TRIAL MAY
BE HAD BEFORE A STATE OR FEDERAL JUDGE BY MEANS OF A BENCH TRIAL WITHOUT A JURY.
IN VIEW OF THE FOREGOING, AND AS A SPECIFICALLY NEGOTIATED PROVISION OF THIS
AGREEMENT, BORROWERS AND LENDER HEREBY EXPRESSLY WAIVE ANY RIGHT TO TRIAL BY
JURY OF ANY CLAIM, DEMAND, ACTION OR CAUSE OF ACTION ARISING UNDER THIS
AGREEMENT, OR THE TRANSACTIONS RELATED HERETO, WHETHER NOW EXISTING OR HEREAFTER
ARISING, AND WHETHER SOUNDING IN CONTRACT OR TORT OR OTHERWISE; AND BORROWERS
AND LENDER HEREBY AGREE AND CONSENT THAT BORROWERS OR LENDER MAY FILE AN
ORIGINAL COUNTERPART OR A COPY OF THIS SECTION WITH ANY COURT AS WRITTEN
EVIDENCE OF THE CONSENT OF THE PARTIES HERETO TO THE WAIVER OF THEIR RIGHT TO
TRIAL BY JURY.


                                       3


<PAGE>
                                    LEXINGTON PRECISION CORPORATION

                                    By: /s/ Michael A. Lubin
                                        --------------------------------
                                    Its: Chairman of the Board
                                        --------------------------------

                                    LEXINGTON RUBBER GROUP, INC.

                                    (FKA LEXINGTON COMPONENTS, INC.)

                                    By: /s/ Michael A. Lubin
                                        --------------------------------
                                    Its: Chairman of the Board
                                        --------------------------------

                                    BANK ONE, NA (fka as Bank One, Akron, NA)


                                    By: /s/ Randy Abrams
                                        --------------------------------
                                    Its: Assistant Vice President
                                        --------------------------------


                                       4