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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Polysulfides have been replaced by urethanes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.