Rectorseal Rectorseal 21 Blackjack Pipe Thread Sealant; 1/2 Pint...
Rectorseal Rectorseal 21 Blackjack Pipe Thread Sealant; 1/2 Pint..., RectorSeal No. 21 pipe thread sealant is a black, soft-set, multi-purpose sealant created for applications where a black sealant is preferred. Recommended for use on threaded galvanized steel, iron, brass, copper, aluminum, stainless steel, fiberglass reinforced polyethylene and PVC pipe. Conforms to AMS-S-7916 and TT-S-1732.