Master Bond Polymer Adhesive EP21TPHTQ is a two component thermally conducitve, electrically insulative polysulfide/epoxy based adhesive/ sealant formulated to cure at room temperature or more rapidly at elevated temperatures, with a 100 to 100 mix ratio (A/B) by weight. It readily develops a high bonding strength of more than 1000 psi at room temperature which unlike that of many other epoxy adhesives, is relatively insensitive to mixing ratio or substrate cleaning procedures. It produces durable high strength and tough, flexible bonds and seals which are remarkably resistant to thermal cycling and chemicals including water, oil, fuels and most organic solvents, over the exceptionally wide temperature range of -60°F to 325°F. Adhesion to metals, glass, ceramics, wood, vulcanized rubbers and many plastics is excellent. The hardened adhesive/sealant is an outsiding electrical insulator. Color of part A gray, part B amber. Master Bond EP21TPHTQ adhesive/sealant is widely used in the electronic, electrical, computer, construction, metalworking, appliance, automotive and chemical industries. EP21TPHTQ and related systems have been successfully used as fuel tank sealants for years!

The cured compound fully meets the requirements for polysulfide/epoxy type adhesive/sealants. It is also available as a flowable liquid of moderate viscosity; EP21TPHTQ (viscosity 50,000 cps), or lower viscosity version.