Poly 72 Series Part A is an additive that can be added to the Poly-Fast 72-40 to make it thixotropic for brushing application.
Part D is a liquid thickener for Poly-Fast 72-40 that can be used with extra part A to turn 72-40 from a pourable rubber to a brush-on rubber. Levels of thickening can be varied from that of a thin latex paint to a grease-like putty. One part D added to 100 parts B results in a light cream consistency. For every part of D used, one extra part of A is required. Part D is added to 72-40 part B first.
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