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SAE AMS-S-29574 Revision A, February 1, 2011
Sealing Compound, Polythioether, for Aircraft Structures, Fuel and High
Temperature Resistant, Fast Curing At Ambient and Low Temperatures
Description / Abstract:
Form:
This specification establishes the requirements for two types and three classes of a two component, fast curing at low and ambient temperature, polythioether sealing compound for use in sealing integral fuel tanks and other aircraft structures. Temperature capabilities are identified in 1.2.1.
Classification:
The sealing compound shall be classified as follows:
Types: There are two types of sealants furnished to this document. Additionally, Type I is furnished in 3 grades as shown below.
Type I - Fuel resistant sealant for use form -80ºF to +300ºF (-63ºC to +149ºC) with intermittent use to +400ºF (204ºC).
Grade A - For general use in fuel tanks and aircraft structures
Grade AI - Ambient cure or immediate heat cure at temperatures up to 350ºF (175ºC) immediately after application. Available as class B and Class C.
Grade B - Enhanced craze resistance, for use with acrylic aircraft transparencies.
Type II - Corrosion inhibitive, fuel resistant sealant for use form -80ºF to +300ºF (-62ºC to +149ºC) with intermittent use to +360ºF (+182ºC).
Classes:
Class A - Suitable for brush application
Class B - Suitable for application with extrusion gun or spatula
Class C - Suitable for faying surface sealing applications
Application time: The minimum application time in hours for each class shall be:
Class A - 1/4, 1/2, 2
class B - 1/4, 1/2, 2
Class C - 4
This specification establishes the requirements for two types and three classes of a two component, fast curing at low and ambient temperature, polythioether sealing compound for use in sealing integral fuel tanks and other aircraft structures. Temperature capabilities are identified in 1.2.1.
Classification:
The sealing compound shall be classified as follows:
Types: There are two types of sealants furnished to this document. Additionally, Type I is furnished in 3 grades as shown below.
Type I - Fuel resistant sealant for use form -80ºF to +300ºF (-63ºC to +149ºC) with intermittent use to +400ºF (204ºC).
Grade A - For general use in fuel tanks and aircraft structures
Grade AI - Ambient cure or immediate heat cure at temperatures up to 350ºF (175ºC) immediately after application. Available as class B and Class C.
Grade B - Enhanced craze resistance, for use with acrylic aircraft transparencies.
Type II - Corrosion inhibitive, fuel resistant sealant for use form -80ºF to +300ºF (-62ºC to +149ºC) with intermittent use to +360ºF (+182ºC).
Classes:
Class A - Suitable for brush application
Class B - Suitable for application with extrusion gun or spatula
Class C - Suitable for faying surface sealing applications
Application time: The minimum application time in hours for each class shall be:
Class A - 1/4, 1/2, 2
class B - 1/4, 1/2, 2
Class C - 4
SAE AMS-S-29574 Revision A, February 1, 2011
Sealing Compound, Polythioether, for Aircraft Structures, Fuel and High
Temperature Resistant, Fast Curing At Ambient and Low Temperatures