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Ift:p <br />i" ■ ' <br />'r <br />I- <br />L- <br />% <br />i. <br />r <br />I s'f- <br />i ? '• E>c' <br />! " <br />• ^ ' <br />I . <br />y' <br />I- <br />w% <br />k <br />I <br />C <br />#S’i <br />W’’ife® • <br />_ _. , . _r;r.aT-afnrr" will get near or below freezing. Anotherencasenient and totfieraturM wui 9 ^ ^ formulation of <br />intorestin9 <^*"“<=^^2 tafconliderable shrinkage when exposed to water, polyurethane, without CFC s, naa ua^er to enter voids within the <br />This action ^Id a ,l»rof“CScyInruJel^d'arryinrSiUty. The <br />shaped encasements. <br />oolvstvrene is asmufactured by enly one can>any with MtnisiOT <br />7“ or 10^’ ^gi Tand 20" or 24" wide. The inatsrial is blue, a^ 1 ®re 7 or iU , .«:a,w m-4-1* uater afasorDtlOd <br />that <br />has a <br />SSsI’ty^of i«t“Sla:r2 ^te./~:n.."5^h Ce-ry mUe-water absorption. * <br />S ^ “eilj eroded by the normal deteriorating elmnents. <br />S?fr^ti« bj freeWt^ is tlr less than in polyurethane but not <br />quite as good as expanded polystyrene. <br />ihm pro^rly designed should last in the 30 to 40 year range. <br />-3-