ProductDescription3M™PolyesterFilmTape850cangenerallybeusedforsplicingandapplicati***wherechemicalresistanceand/orcleanremovalisnecessary.Thesilverbackingisatransparentpolyesterwithathinlayerofaluminumandthegoldisapigmentedpolyesterwithathinlayerofaluminum.ProductC***tructionBackingAdhesiveColorStandardRollLengthPolyesterAcrylic(transparentTransparent,Red,Black,72yds.(66m)orpigmented)White,Silver,Gold)