PPG Aerospace? PR-1776M B-1/2 Brown PRC Standard Spec Low Weight Fuel Tank Sealant - 2.5 oz 655-SemKit - Visit and view our entire SkyGeek, Shop Supplies, Aerospace Sealants, Fuel Tank Sealants, PPG Aerospace? PR-1776M Class B-1/2 Low Weight Fuel Tank Sealant, section at SkyGeek!