I-SWD250 Spray Rigid Polyurethane Foam yathuthukiswa yi-SWD Urethane Co. USA ngeminyaka yawo-1970.Kusetshenziswe kabanzi ekwakheni ukwahlukanisa ukushisa odongeni e-US futhi kugunyazwe njenge-Energy Star yi-USEPA.Igwebu le-SWD250 polyurethane liwumthombo oqinile wegwebu le-microporous elinenani eliphansi lokumunca, ukumelana okuhle kokungena, ngaphezu kwama-95% wokuqukethwe kweseli evaliwe.Kusetshenziswa ngobuchwepheshe be-spray obuqondile, akukho mithungo phakathi kwezendlalelo zegwebu okwakhiwa ungqimba oluphelele lwe-impermeable ku-substrate.Idala isendlalelo sokuvikela esigwema ukumuncwa kwamanzi futhi ixazulule kahle izindonga zesakhiwo izinkinga ezivuza amanzi kanye nezinkinga zokuvikela ukushisa.