... 2.size are made by your requriment Fiberglass woven roving 1eat the unsaturated poyester resin or expoxide resin well ... numbers of untwisted continuous filaments. Due to higher fiber content, woven roving's lamination has excellent tensile strength and impact- ... as boat, vehicle components, pressure tank, house, etc. Woven roving is the primary strength material used in fiberglass boatbuilding. 18 ...