Polyethylene Sheet Material Polyethylene Shape Sheet Grade Standard Length 4 ft Width 4 ft Thickness 3/4 in Backing Type Plain Cell Type Closed Cell Adhesive Type Plain Backing Number of Adhesive Sides 0 Color Black Density 4 lb/cu ft Maximum Temperature 225 Degrees F Minimum Temperature -40 Degrees F Tensile Strength 85 psi Texture Smooth Firmness @ 25 Percent Deflection 14 psi Material Skin None Flexibility Poor Standards FMVSS 302 Chemical Resistance Good