MIXING RESIN AND TOPCOAT WITH FIBERGLASS CHOPPED STRAND MAT CALCULATE RESIN AND TOP COAT Roof resin and topcoat weight – If buying a twenty kilogram keg or drum you'll be able to expect it to contain about eighteen to nineteen Litres. Pictured is that the average CSM fiberglass chopped stand mat Published 7 Years Ago by zccyfiberglass