HPS 990

Porosity Sealant (HPS) 990 is the solution to leak proof parts, improving machinability, in addition to increasing the durability and surface quality for painting and plating. HPS 990 is also excellent for sealing leak paths in rigid electronic assemblies. The hardened resins exhibit superior chemical resistance and elevated temperature stability. The microscopic voids, where potential leaks occur in the part are filled by the low viscosity resin during vacuum application. Sealed micropores cure without shrinkage to form tough cross-linked thermoset polymer, permanently sealing the piece. Excess residual adhesive is washed from the part surface during rinsing with water. The parts leave the impregnating process without surface residue and can then be used in production within a few short hours. The resin polymerizes, sealing gaps in any assembly. This protects electrical components against leakage from air, water, coolants and oils. When used in preparation for plating or painting processes, the impregnation process also eliminates absorption of plating materials (like acids) or painting prep solvents that could otherwise later bleed out of pores causing finishes to discolor, bleed, pit or peel. Sealed powdered metal parts exhibit better machinability, enhanced tool life and better dimensional control.