S-50 PUTTY SEALANT is an asbestos-free multi-purpose pliable thumb grade sealant specifically formulated for use in the construction, telecommunication, and electrical industries. S-50 is excellent for use around conduit, junction boxes, pedestals, meters, wire service entries, and for sealing around cables. S-50 is not a fire stop material. Compounded from synthetic polymers to produce superior tack and sealing properties, S-50 Putty Sealant provides resistance to penetration by water, air, and dust. S-50 has excellent adhesion to a variety of substrates including metal, concrete, wood stucco, fiberglass, and most plastics.