MA-25S® is a medium density, room temperature curing, ablator/insulator, which has been used extensively for thermal protection on
aircraft and space launch vehicles. On the Space Shuttle, short duration exposure to temperatures exceeding 1200°F may be encountered. In aircraft engine applications, continuous use temperatures range between 300-600°F. The MA-25S® material has been FAA
certified for fire proof protection of fan thrust reversers per FAR Part 25.1181a and FAA Advisory Circular AC 20-135.
The material is a filled elastomeric silicone which is available in either a sprayable or trowelable form. The sprayable material (Type I)
can be applied using standard spray equipment for large area primary applications. The trowelable/moldable material (Type II) can be
used for small area applications or as a repair material for damage to the sprayable insulation. MA-25S® can also be obtained in precured sheet form for secondary bonding applications.
Type II (trowelable): 1 gallon kits
Prior Uses:
- MA-25S® has been flight qualified through extensive testing for
the following systems:
• X-15 flight research vehicle - Thermal insulation for Mach 8 flight
• Titan IIIC universal payload fairing - Ascent heat protection
• CF6 fan reversers of PR-10, 767, 757, 747, 737, MD-11, L-1011,
A-300, A-310 and A-330 aircraft. The material is used as flame
resistant insulation and firewall protection for engine nacelles and
engine components.
• Space Shuttle External Tank - Ascent heat protection at shock
interference locations.
• KC-135 engine retrofit - Firewall protection
• High performance missiles - Thermal protection
