Dupont XPS 250 Blue Board All Sizes checklist Estimated Lead Time 12 14 Working Days Weight 87 checklist Estimated Lead Time 3 5 Working Days Weight 87 To adhere to the substrate with CAV GRIP allow it to dry until it does not transfer to finger when touched Blue Board's closed cell structure and lack of voids resist moisture penetration thus increasing its thermal efficiency and protecting underlying materials from water damage Rmax 4ft x 8ft Polyiso Rigid Foam Insulation Board Thermasheath 3: The Rmax Polyiso Rigid Foam Insulation Board Thermasheath 3 offers excellent thermal insulation and is ideal for both commercial and residential projects