MIL-PRF-81733 Sealing And Coating Compound, Corrosion InhibitiveThis specification covers accelerated, room temperature curing synthetic rubber compounds used in the sealing and coating of metal components on weapons and aircraft systems for protection against corrosion. The Class 1 sealing compound is effective over a continuous operating temperature range of ??65?? to +250?? F \(??54?? to +121?? C\). The Class 2 sealing compound is effective over a continuous operating temperature range of ??80?? to +320?? F \(??62?? to +160?? C\).

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MIL-PRF-81733D

SOCIETY FOR AUTOMOTIVE ENGINEERS (SAE)

SAE-AMS2629

Fluid, Jet Reference (DoD adopted).

SAE-AMS3819

Cloths, Cleaning, For Aircraft Primary and Secondary

Structural Surfaces (DoD adopted).

SAE-AMS4376

Plate, Magnesium Alloy 3.0A1-1.0Zn-0.20Mn (AZ31B-H26)

Cold Rolled and Partially Annealed (DoD adopted).

(Application for copies should be addressed to the Customer Service Department,

Publications Group, SAE, 400 Commonwealth Drive, Warrendale, PA 15096.)

2.4 Order of precedence. In the event of a conflict between the text of this document and

the references cited herein (except for related associated specifications, specification sheets, or

MS standards), the text of this document takes precedence. Nothing in this document, however,

supersedes applicable laws and regulations unless a specific exemption has been obtained.

3. REQUIREMENTS

3.1 Qualification. The corrosion inhibitive sealing compounds furnished under this

specification shall be products that are authorized by the qualifying activity for listing on the

applicable qualified products list before contract award (see 4.3 and 6.3).

3.2 Material. The basic ingredient used in the manufacture of the Class 1 sealing compound

shall be a polysulfide synthetic rubber; the basic ingredient for the Class 2 sealing compound shall

be a polythioether synthetic rubber. The sealing compound shall cure by the addition of a

separate curing agent to the base compound. Grade B compounds shall contain no chromium or

lead compounds.

3.2.1 Soluble chromate compound (Grade A only). Soluble chromate compounds shall be

formulated as an integral part of the base compound, the curing system, or both. Any soluble

chromate compound shall be permitted provided the base compound, curing agent, and cured

compound meet all the requirements contained herein.

3.2.2 Unit of issue. In order to interface with existing equipment and meet the required

storage characteristics, the unit of issue for the sealing compound shall be in kits as described

below.

Amount of Base Compound

Volume Tolerance

Kit Size

� 1/8 fluid ounce

1/2 pint

6 fluid ounces

� 1/4 fluid ounce

1 pint

12 fluid ounces

� 1/2 fluid ounce

1 quart

24 fluid ounces

� 2 fluid ounces

1 gallon

96 fluid ounces