NickthelibrarianNo. The material is silicone impregnated (good for tear strength) but then also has an additional PEU coating on the inside that has the advantages of (1) making the floor non-slippery and (2) allow it to be seam taped. So the tent can be seam sealed on the outside with silicone like other UL tents but it doesn't need it because it's factory seam taped on the inside.