3M Aerospace AC-240 Class B-2 Fuel Tank & Fuselage Sealant
3M Aerospace AC-240 Class B-2 fuel tank and fuselage sealant from SkyGeek is specially tailored to seal aircraft fuel tanks and fuselages. This polysulfide-based material is made up of two components. When mixed, the material has a low-sag consistency, which can be applied to vertical surfaces using a spatula or extrusion gun. Once the substance has been applied, it cures quickly and forms a fuel- and chemical-resistant seal. The cured sealant maintains a flexible and strong bond with many metal substrates.
Read the Technical Data Sheet.
Use InstructionsTwo-Part Sealant Cartridges:
The shelf life of AC-240 Class B is 9 months from date of packaging, when stored at temperatures below 80 degrees F in its original container.
Mixed AC-240 Class b 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-240 Class B 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.