Plastic Seal is a multi-purpose， extremely durable polyurethane sealant. Excellent lead substitute for caulking cast iron soil pipe joints. Works with or without oakum. Single component polyurethane sealant that cures rapidly to a firm yet flexible， waterproof， and weather resistant seal. Odorless sealant is crack-proof， shrink-proof， and will not produce any fumes while curing. Excellent adhesion properties to most common substrates such as plastic， wood， cast iron， masonry， most metals， tile， concrete， glass， aluminum， nitreous china， an porcelain. Air dries. Does not contain any VOC (volatile organic compouond) or TDI (toluene diisocyanate).