Vasavibala Resins [P] Ltd supplies Low Flammability and Low Smoke Resin for RTM Purpose. Vasavibala Resins [P] Ltd is the manufacturer of unsaturated Polyester Resins. The Very Low Flammability and Low Smoke Resin for RTM Purpose is Orthophthalic - FRR type chemical. It appears in off-white opaque liquid form. It features Density @ 25 deg C, ISO 6746 / B: 1. 40 - 1. 50; Viscosity @ 25 deg C, cps ISO 6746 / C: 700-800; Acid value, mg / KOH / gm ISO 6746 / D: 13-17; Volatile content, percent ISO 6746 / E: 23 - 25; HDT deg C ISO 62: 70 and Water absorption, mg ISO 62: 50.