SIS 440 Caulking

No primer is required for this one-part, paste-like neutral cure patented formulation.This neutral cure is non-corrosive to all substrates.

SIS 440 is a proven leader in the marine industry and used by our team on every deck we manufacture. No primer is required for this one-part, paste-like neutral cure patented formulation, which when exposed to moisture in the air, reacts to form a tough, flexible solid rubber.This neutral cure is non-corrosive to all substrates. It provides the durability required in the marine environment and has excellent temperature stability and chemical resistance once cured.