SmartSHIELD -20mm 48" X25ft Reflective Insulation Roll, Foam Core Radiant Barrier, Thermal Foil Insulation Panel - 0.8 Inch Thickness, R-23

Highly efficient - reflects 95% of radiant energy, an ideal radiant barrier. R-value up to 23 (with one layer), up to 29 (with two layers). Standard ASTM D-638. Vapor barrier - prevents condensation, unaffected by humidity and moisture. Meets or exceeds all ASTM C1313 standards - Class A fire rating (E84 with E2599 mounting). Corrosion resistance per D3310 is provided by a proprietary clear layer applied to the engineered foil surface. Industrial / commercial grade - 20mm - 0.8 inch thickness - foam core reflective insulation is tear & puncture resistant, yet can be easily cut with a utility knife. Both sides reflect 95% of the radiant heat. Pays for itself by lowering heating expenses in winter and cooling costs in summer. Non-toxic - will not cause irritation to skin, eyes, or throat. Non-allergenic