Use Great Stuff Pro Gaps & Cracks 24 oz. Insulating Foam Sealant to insulate and seal cracks & openings up to 3 in. This will help prevent unwanted drafts, moisture and insects. It is designed to be applied with a foam gun. Creates a long-lasting, water-resistant and fireblock seal around plumbing and electrical, in basements, attics, and more.. Compatible Install Surface: Existing Insulation. Cure Time (hours): 1. Dry to Touch (min.): 8. Install Temperature (F): 70. Insulation Features: Fire Block Rated,Paintable,Stainable. Insulation R-Value: R2. Insulation R-Value per Inch: R3.7. Insulation Type: Spray Can. Number of Pieces: 1. Product Weight (lb.): 2.3 lb. Product Weight (oz.): 24 oz. Returnable: 90-Day. Cover Area Per Bag (sq. ft.): 14 sq ft. Coverage Area (sq. ft.): 14 sq ft. Product Height (in.): 10.75 in. Product Width (in.): 2.75 in. Insulation R-Value per Inch: R3.7. Insulation Features: Fire Block Rated. Insulation Type: Spray Can. Insulation Features: Paintable. Compatible Install Surface: Existing Insulation. Insulation Features: Stainable