Form

This specification covers three types and three classes of fuel-resistant polysulfide (T) sealing compound with low specific gravity, supplied as a two-component system which cures at room temperature.

Application

This sealing compound has been used typically in sealing aircraft integral fuel tanks, fuel tank fillets and faying surfaces, pressure barriers and moldline surfaces, but usage is not limited to such applications. The sealing compound is resistant to jet fuels and is capable of withstanding long-term exposure from -65 to +250 °F (-54 to +121 °C) and short-term exposure (six hours) to 360 °F (182 °C).

Classification

Type 1 - Sealing compound with a specific gravity of 1.20 to 1.35.

Type 2 - Sealing compound with a specific gravity of 1.06 to 1.19.

Type 3 - Sealing Compound with a specific gravity of 1.05 or less.

Sealing compounds covered by this specification are classified by method of application and application times as follows:

Class A Suitable for application by brushing, injecting, or spraying. Available with the following application times in hours:

A-1/2

A-2

Class B Suitable for application by extrusion gun or spatula. Available with the following application times in hours:

B-1/2

B-2

Class C Suitable for faying surface or shim sealing, brush coating, or wet installation. Available with the following application times in hours:

Notation: ( ) Assembly time in hours.

C-2(2)

C-8(24)

C-12(48)

C-48(168)

C-96(336)

Safety - Hazardous Materials

Shall be in accordance with AS5502 (1.1).