Inorganic adhesives sulfur cements

Liquid sulfur (melting point 388°C) can really be considered an inorganic hot-melt adhesive. This material should not be exposed to temperatures higher than 93°C because of a marked change in the coefficient of expansion at 96°C as a result of a phase change. The addition of carbon black and polysulfides improves its physical properties. Tensile strength values of about 4.0 MPa have been reported, which decreased to 3.0 MPa after 2 years of exposure to water at 70°C. The principal use of sulfur cements... 

Tphe relatively low cost, high availability, and excellent physical prop-- erties of sulfur have justified considering it as a construction material. Its excellent bonding or adhesive qualities as well as chemical compatibility with many types of inorganic materials make it competitive for many applications which currently use cement or plaster binders. Its water repellancy makes it even more attractive for construction applications. 

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