... for hand lay-up method in high-grade fiberglass.SL-191C medium viscosity, high reactivity, manufactures ... versatility, suitable for hand lay-up method of ordinary fiberglass.SL-191D moderate viscosity, high reactivity, high strength ... the high FRP.SL-157 series pre for thixotropic resin, toughness, high strength, thixotropic good, does not ... , xylene), etc. Solvent dilution. unsaturated polyester resin