3M Aerospace AC-236 Class A-1/2 Fuel Tank & Fuselage Sealant
Effectively seal, bond and protect aircraft fuselages and fuel tanks with 3M Aerospace AC-236 Class A-1/2 fuel tank and fuselage sealant from SkyGeek. Use a brush to apply this two-component, liquid polysulfide polymer sealant to your aircraft. Once cured, AC-236 is resistant to aviation gasoline, jet fuel, petroleum products and other chemicals that are commonly used in the aerospace industry. This sealant maintains its performance, flexibility and bond strength on many metal substrates. Some of these include aluminum, stainless steel and steel. It withstands extreme temperatures as well as weathering and stress.
Approvals, References and Specifications
Use InstructionsTwo-Part Sealant Cartridges:
The shelf life of AC-236 Class A is 9 months from date of packaging, when stored at temperatures below 80 degrees F in its original container.
Mixed AC-236 Class A may be stored under refrigeration as follows: 15 days at -10 degrees F, 30 days at -40 degrees F.
It is important to remember that freezing, storing and thawing procedures reduce application life. Also, frozen storage will reduce application life by varying amounts depending on the storage temperature and length of storage time. All aspects of storage, freezing and thawing should be planned carefully and it is not recommended to mix and freeze with less than half an hour application time.
Health and Safety Precautions
AC-236 Class A sealant is safe to use and apply when recommended precautions are followed. Before using this product, read and understand the Material Safety Data Sheet (MSDS), which provides information on health, physical and environmental hazards, handling precautions and first aid recommendations. An MSDS is available on request. Avoid overexposure. Obtain medical care in case of extreme overexposure.
SpecificationsAMS-S-8802 - Qualified
LES 1039 BU - Qualified
BS 4657 - Qualified
BS 25146 - Qualified
Typical Physical Application Properties
Application Life and Cure Time
(At 75 degrees F, 50% relative humidity)
*Application Life refers to the length of time that mixed compound remains at a consistency suitable for application with roller or brush. Application life is always measured at a standard temperature of 75 degrees F with a relative humidity level of 50%. In general, for every 20 degrees F rise in temperature, the application life is halved; and for every 20 degree drop, it is doubled. High humidity levels during the mixing process will shorten application life.
**Tack-free Time is the length of time after which a mixed sealant will no longer tightly adhere to L-LP-690 standard low density polyethylene film.
***Cure time is defined as the length of time it takes AC-236 Class A sealant to reach 30A hardness. It depends on three factors: remaining application life, temperature and relative humidity. To a certain extent, the temperature/humidity factors for application life also apply to curing. To accelerate the curing process, apply heat up to (but not more than) 120 degrees F.
Typical Physical and Performance Properties of Cured Compound After 14 Days at 77 degrees F / 50% Relative Humidity (when tested per AMS-S-8802)
Typical Values of AC-236 Class A to AMS-S-8802
**Specification requirement - 20 lbs. / 100%, wire mesh