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Standard

Test Method for Aerospace Firewall Sealant Flame Penetration

2024-03-18
CURRENT
AS5127/2D
This SAE Aerospace Standard (AS) describes the test methods to determine the flammability performance and capability to control the passage of, and effects from, fire on aircraft firewall sealing compounds. The methods are based on requirements of FAR Part 25, Sections 25.865, 25.867, 25.1191, and 25.1193 and may be used to demonstrate compliance with the requirements established by FAA AC 20-135. This standard shall be used in conjunction with applicable material specifications.
Standard

Standard Requirements for Aerospace Sealants and Adhesion Promoters

2022-11-14
CURRENT
AS5502E
This SAE Aerospace Standard (AS) establishes standard requirements for aerospace sealants and adhesion promoters, which may be incorporated as part of SAE Aerospace Material Specifications (AMS) for such products. This document provides for commonality of methods and procedures for responsibility for inspection, source inspection, classification of tests, establishment of/and qualification to qualified products lists, approval, reports, resampling and retesting, packaging, and marking.
Standard

Sealing of Integral Fuel Tanks

2022-07-26
CURRENT
AIR4069D
This SAE Aerospace Information Report (AIR) presents preferred design, assembly, and repair practices for sealing of aircraft integral fuel tanks, including rework of applied fuel tank seals. It addresses engineering designs for integral fuel tanks as they are currently found in practice and discusses the most practical and conservative methods for producing a reliable, sealed system. Although this AIR presents practices for sealing of integral fuel tanks, the practices presented within this report are practices that are carried throughout sealing that include both pressure and environmental aircraft sealing. Design preferences for optimum sealing are not within the scope of this document. Such discussions can be found in the United States Air Force (USAF) sponsored report AFWAL-TR-87-3078, “Aircraft Integral Fuel Tank Design Handbook.”
Standard

Insulating Compound, Electrical, Embedding, Reversion Resistant Silicone

2021-03-05
CURRENT
AS81550B
This specification covers the requirements for two types of a two-part, transparent, reversion resistant flexible insulating compound, to provide resilient, environmental, and electrical insulation of components in systems in temperature range -85 to 392 °F (-65 to 200 °C). These insulating compounds are intended for embedding, potting or encapsulation of electrical and electronic components in systems where tear resistance is not critical, but their use is not limited to such applications. These transparent compounds allow visual circuit and part identification and facilitate part replacement and repairs. The insulating compound shall cure in sections of unlimited thickness, either exposed to air or completely sealed.
Standard

Jet Reference Fluid Study for Fuel Tank Sealants

2021-02-03
CURRENT
AIR4275B
This information report covers two distinct projects to formulate Jet Refrence Fluids (JRF) for testing of material compatibility. The first effort began in 1978 and focused on producing a formulation (JRF-2) that simulated JP-4 and included composition with metallic ions that reproduced chalking of fuel tank sealants. This effort resulted in the preparation of AMS2629 that defined the formulation of JRF-2 (Type 1) and the same formulation with metallic ions (Type 2). The second effort began in 2002 and focused on preparing a JRF that simulated Jet A, JP-5 and JP-8. This effort went through multiple iterations, but eventually resulted in a JRF-3 formulation composed of Jet A plus military additives spiked to 25% aromatic content and high levels of sulfur experienced in the global fuel supply. Since the metallic ions added to JRF-2 demonstrated their ability to simulate a chalking reaction, chalking was not tested with the ions added to JRF-3.
Standard

Test Method for Aerospace Firewall Sealant Flame Penetration

2020-07-07
HISTORICAL
AS5127/2C
This SAE Aerospace Standard (AS) describes the test methods to determine the flammability performance and capability to control the passage of, and effects from, fire on aircraft firewall sealing compounds. The methods are based requirements of FAR Part 25 Sections 25.865, 25.867, 25.1191, and 25.1193 and may be used to demonstrate compliance with the requirements established by FAA AC 20-135. This standard shall be used in conjunction with applicable material specifications.
Standard

Aerospace Standard Test Methods for Aerospace Sealants Two-Component Synthetic Rubber Compounds

2020-03-18
CURRENT
AS5127/1D
This SAE Aerospace Standard (AS) describes test methods to determine the application and performance properties of two-component sealing compounds. It shall be used in conjunction with AS5127 and the applicable material specification. When modifications to these test methods are called out in material specifications, the material specification shall take precedence.
Standard

Sealing of Integral Fuel Tanks

2016-11-23
HISTORICAL
AIR4069C
This SAE Aerospace Information Report (AIR) presents preferred design, assembly, and repair practices for sealing of aircraft integral fuel tanks, including rework of applied fuel tank seals. It addresses engineering designs for integral fuel tanks as they are currently found in practice; and discusses the most practical and conservative methods for producing a reliable, sealed system. Although this AIR presents practices for sealing of integral fuel tanks, the practices presented within this report are practices that are carried throughout sealing that include both pressure and environmental aircraft sealing. Design preferences for optimum sealing are not within the scope of this document. Such discussions can be found in the United States Air Force (USAF) sponsored report, entitled Aircraft Integral Fuel Tank Design Handbook, AFWAL-TR-87-3078.
Standard

Standard Requirements for Aerospace Sealants and Adhesion Promoters

2016-04-10
HISTORICAL
AS5502D
This document establishes standard requirements for aerospace sealants and adhesion promoters, which may be incorporated as part of Aerospace Material Specifications (AMS) for such products. This document provides for commonality of methods and procedures for responsibility for inspection, source inspection, classification of tests, establishment of/and qualification to qualified products lists, approval, reports, resampling and retesting, packaging, and marking.
Standard

Aerospace Standard Test Methods for Aerospace Sealants Two-Component Synthetic Rubber Compounds

2014-10-08
HISTORICAL
AS5127/1C
This SAE Aerospace Standard (AS) describes test methods to determine the application and performance properties of two-component sealing compounds. It shall be used in conjunction with AS5127 and the applicable material specification. When modifications to these test methods are called out in material specifications, the material specification shall take precedence.
Standard

Insulating Compound, Electrical, Embedding, Reversion Resistant Silicone

2014-05-06
HISTORICAL
AS81550A
This specification covers the requirements for two types of a two-part, transparent, reversion resistant flexible insulating compound, to provide resilient, environmental, and electrical insulation of components in systems in temperature range −85 to 392 °F (−65 to 200 °C). These insulating compounds are intended for embedding, potting or encapsulation of electrical and electronic components in systems where tear resistance is not critical but their use is not limited to such applications. These transparent compounds allow visual circuit and part identification and facilitates part replacement and repairs. The insulating compound shall cure in sections of unlimited thickness, either exposed to air or completely sealed.
Standard

Test Method for Aerospace Firewall Sealant Flame Penetration

2014-05-06
HISTORICAL
AS5127/2B
This SAE Aerospace Standard (AS) describes the procedures for the flammability testing of aircraft firewall sealants in accordance with the requirements of FAR Part 25 Sections 25.865, 25.867, 25.1191, and 25.1193. This test method is intended to determine the capability of sealant materials to control the passage of and effects from fire.
Standard

Test Method for Aerospace Firewall Sealant Flame Penetration

2013-03-20
HISTORICAL
AS5127/2A
This SAE Aerospace Standard (AS) describes the procedures for the flammability testing of aircraft firewall sealants in accordance with the requirements of FAR Part 25 Sections 25.865, 25.867, 25.1191, and 25.1193. This test method is intended to determine the capability of sealant materials to control the passage of and effects from fire.
Standard

Standard Requirements for Aerospace Sealants and Adhesion Promoters

2013-03-20
HISTORICAL
AS5502C
This document establishes standard requirements for aerospace sealants and adhesion promoters, which may be incorporated as part of Aerospace Material Specifications (AMS) for such products. This document provides for commonality of methods and procedures for responsibility for inspection, source inspection, classification of tests, establishment of/and qualification to qualified products lists, approval, reports, resampling and retesting, packaging, and marking.
Standard

Plastic Disposable Cartridge, Plunger, Nozzles and Cartridge Assembly

2012-11-21
CURRENT
AS4491A
This SAE Standard covers empty cartridges, plungers, cartridge assemblies, and nozzles which are used to package, store, and dispense single or multiple component sealants, adhesives, and other similar materials. This document defines the size, shape, composition, and function of the plastic molded cartridges, plungers, and cartridge assemblies. This document is not intended as a detailed manufacturing document.
Standard

Jet Reference Fluid Study for Fuel Tank Sealants

2012-01-17
HISTORICAL
AIR4275A
Standard reference fluids, or test fluids, have long been used to evaluate the effects of hydrocarbon fuels on various materials, such as integral fuel tank sealants. Standard fluids are required because hydrocarbon fuels, such as JP-4, vary widely in composition depending on crude source, refining techniques, and other factors. To ensure reliable and reproducible results when determining the fuel resistance of materials, reference fluids of known composition, using worst case fuel compositions, are used. The current Jet Reference Fluid (JRF) called out in military sealant specifications was developed in the mid-1950s specifically as a JP-4 type test fluid formulation to be used for the accelerated laboratory testing of integral fuel tank sealants. In August 1978, chalking of the polysulfide sealant in integral fuel tanks of some new aircraft at Edwards Air Force Base in California was discovered after only 1 year of service.
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