Perlite Pipe Covering Insulation is a pre-formed, high-temperature, non-wicking pipe and block insulation. It is composed of expanded perlite that is uniformly reinforced with a high-strength fiber for use on systems operating up to 1200°F (649°C). SMC Industries' has the largest variety of molded perlite fitting covers on the market. With various insulation thickness and pipe dimension options available, we ensure a secure fit and maximum thermal efficiency specific to your project needs.