VEVOR Double Reflective Insulation Roll, Foam Core Radiant Barrier, 3.2 mm 48 in x 50 ft, Double-Sided Aluminum Foil EPE Foam Heat Reflective Shield, Thermal Insulation Roll for Window RV Roof

Completely waterproof and moisture-resistant, ideal for superior moisture protection. Can be used with moisture barriers; this material primarily provides thermal insulation. Apply adhesive directly to the back of the material for bonding. If this response does not resolve your current issue, please contact us again for assistance.

The value of r is 0.0829 (m2 · K)/W.

The glue might give off chemical you don't want

The R value of EPE1-15 insulation material is about 0.3-0.441W/(m·K)

The thermal resistance is approximately between 0.2-0.5m²・K/W.