Aircraft Eligible for PMA Sealant

NSL870 B4

Replacement for PRC-DeSoto Sealant Pro Seal P/S 870 B4

Below are the makes and models of aircraft that, per the FAA, NSL870 B4 is eligible for use on in replacement of P/S 870 B4.

Like all of our PMA sealants, NSL870 B4 is a cost-saving alternative product that can be safely used in place of the original part. That’s because PMA manufacturers like us submit to a rigorous review process with the FAA in order to ensure that our parts are airworthy. With that approval, you can know that this PMA part will function the same or better than the OEM part. Find out more about PMA parts with our Introductory Guide to PMA Sealants.

NSL870 B4 is a corrosion inhibitive sealant for use on aircraft integral fuel tanks and pressurized cabins as well as other areas subject to contact with aircraft fuels, lubricants, oils, water and/or weathering. NSL870 B4 has an application time of 4 hours, tack free time of 12-14 hours, and cure time of 72 hours. Finding packaging details on the NSL870 B4 product page.