Dictionary of Moisture Protection & Restoration

available in one-component packaging, do not require priming, and are paintable. Do not use butyls for high-movement, water- immersed or traffic joints. Latex: Acrylic emulsions or polyvinyl acetate derivatives. These are typically used for interior applications when a fast cure time is desired for painting. They can be coated sometimes in less than one hour. These materials have very low movement capability, high shrinkage rates and only fair adhesion properties. Latex materials should not be used for any exterior application. Polysulfides: Produced from synthetic polymers of polysulfide rubbers. They are manufactured in one and two- component packaging with a wide range of colors. Polysulfides are acceptable for a wide range of applications. They require primers on all substrates and the required primers vary from substrate to substrate. Polysulfides have been replaced by urethanes and silicones, which have better recovery ability and joint movement capability. Polysulfides should not be used for joints that have bituminous residue or contamination, unless such residue can be completely removed. (This is very difficult to achieve.) They should not be used for joints of substrates containing asphalt or oil-based products.

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