... viscosity, high reactivity, manufactures high mechanical strength, versatility, suitable for hand lay-up method of ordinary fiberglass.SL-191D moderate ... other requirements of the high FRP.SL-157 series pre for thixotropic resin, toughness, high strength, thixotropic good, does not flow ... contain dichloroethane and toluene (benzene, toluene, xylene), etc. Solvent dilution. unsaturated polyester resin