EAST PROVIDENCE, R.I., April 1, 2010 — IMSEAL-800, a high-strength epoxy resin, seals visible porosity deep below the surface in castings and other metal parts, completely and permanently filling blowholes, cracks and other defects where welding or brazing would be impractical. Available from Impco Inc., the clear multipurpose sealant is also suitable for laminating, potting and encapsulating. Without the need for reinforcing materials, it fills all interconnected passageways, producing a leak-proof seal. The sealed area is pressure-tight and can be drilled, tapped, machined and otherwise processed without worry. Economical and easy to use, it is supplied in a premeasured easy-mix packet. The epoxy and activator are mixed before the packet is opened, and the packaging itself can be used as the applicator. Once mixed, the low-viscosity (750 centipoise) modified epoxy has a pot life of ±45 min at room temperature. It cures at room temperature or can be accelerated by heat. Once cured, it withstands pressure, impact and a broad range of chemicals and temperatures. Resistant to most fuels, oils, alcohols, glycols, solvents, salts, mild acids, Freon, and most other common liquids and gases, the cured epoxy resin typically withstands constant service temperatures from -18 to 177 °C. It has a Rockwell hardness of 97, a tensile strength of 9000 lb/sq in. (psi), a compressive strength of 35,000 psi and a compressive yield of 16,500 psi (typical maximums). Three other formulations are available by special order: aluminum-filled IMSEAL-801, brass-filled IMSEAL-802 and iron-filled IMSEAL-803.