Technology of Polysulfide Sealants

Polysulfides, in the liquid polymer form, have been used in sealants since the early fifties. Compounders have been able to devise many uses for these highly versatile reactive liquid polysulfides. Systems based liquid polysulfides have properties of solvent resistance, predictable cure, and excellent adhesion to many substrates. Polysulfide polymers are easily formulated to provide properties and application qualities that allow the compounds to be used as sealants, adhesives and coatings. In addition, compounds based on polysulfides have shown lasting durability in exposure to many environments. They are the oldest, high-performance building sealants used in the world. A property of polysulfide polymers of interest to compounders and end-users alike is their ability to stress-relax, thereby maintaining adhesion to substrates and minimizing stresses. The long lasting performance of polysulfide compounds is attributed to the physical and chemical properties of the polymer. Today, compounds based on liquid polysulfide polymers are used as sealants