EternaBond - AlumiBond Aluminum Foil Backed Tape 21mm, A-Seal

EternaBond AlumiBond is a heavy-duty aluminum-backed repair tape designed for sealing and waterproofing roof seams, tears, and punctures. Using MicroSealant adhesive technology, it forms an air- and vapor-tight barrier that bonds to a wide range of substrates. The aluminum backing adds durability, UV protection, and paintability while maintaining flexibility across extreme temperature ranges.

Key features:

• 4 mil aluminum foil backing with MicroSealant adhesive layer
• Creates an air-tight, moisture-tight, and UV-stable seal
• Bonds to metal, wood, concrete, masonry, rubber, and thermoplastics
• Remains flexible from −70 °F (−57 °C) to +200 °F (+93 °C)
• Paintable aluminum surface for matching finishes

• SKUs: AS-2-50C (2″ × 50′), AS-4-50C (4″ × 50′), AS-6-50C (6″ × 50′)
• Application temperature: Above −10 °F (−23 °C)
• Total thickness: 20 mils (0.51 mm)
• Adhesion: >17 lbs/in width (to unprimed aluminum)
• Flexibility: Excellent
• Tensile strength: >1000 psi
• Weathering: Excellent resistance to wind, rain erosion, and ultraviolet rays
• Sizes available: 2″, 4″, 6″ × 50′ rolls
• Shelf life: Up to 5 years
• Color: Silver aluminum finish
• Compatible surfaces: carbon steel, aluminum, galvanized steel, wood, brick, concrete, masonry, rubber, and thermoplastics
• Typical uses: metal roofs, ducts, seams, panels, and RV or trailer repairs
• 2"x50' - 12/Case
• 4"x50' - 6/Case
• 6"x50' - 4/Case

• Clean and dry the surface to remove dust, oil, and contaminants.
• If installing below 40 °F or on porous surfaces, use EternaPrime primer.
• Cut the tape to the desired length and remove the release liner.
• Position the tape over the repair and press firmly while unrolling.
• Roll firmly with a steel roller to ensure full adhesion and edge contact.

Q: What roll sizes are available for EternaBond AlumiBond?
A: 2″ × 50′, 4″ × 50′, and 6″ × 50′ rolls under SKUs AS-2-50C, AS-4-50C, and AS-6-50C.

Q: What is the recommended application temperature?
A: Apply above −10 °F (−23 °C) with clean, dry surfaces for optimal adhesion.

Q: Does this tape require a primer or additional sealant?
A: No primer is typically required, though EternaPrime may be used in cold or dusty conditions. No extra sealant is needed.

Q: What is the shelf life of AlumiBond?
A: Shelf life is up to 5 years when stored in the original container at room temperature.