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Double-Sided Butyl Sealant Tape – Heavy-Duty Waterproof Mastic Tape for Sealing & Encapsulation

Description:

GS-WT-16, A premium, non-hardening double-sided butyl tape designed to create a permanent, airtight, and watertight seal between two surfaces. Engineered from high-quality synthetic rubber, it remains flexible in extreme cold and won’t melt or sag in high heat. Ideal for vapor barriers, RV window installation, and deck joist sealing, this tape provides superior adhesion to unpainted surfaces like concrete, brick, and metal.

1. Product Stucture

Release Liner: High-quality silicone oil paper or PE film, easy to tear off, preventing the tape from adhering itself before construction.

Pure Butyl Compound: Both sides are made of highly adhesive butyl rubber, without any substrate (non-woven fabric or film), ensuring 100% sealing contact.

2. Product Features

  1. Exceptional Adhesion: Instantly bonds to a wide variety of surfaces including masonry, limestone, bricks, concrete, metal, and plastic—perfect for basement and foundation sealing.
  2. Weather & Temperature Resistance: Maintains a professional seal from -40°C-90°C . It does not harden or crack in winter and will not melt or leak water in intense summer heat.
  3. Crawl Space & Vapor Barrier Optimized: Specifically designed for joining vapor barrier liners and encapsulation films, ensuring a moisture-proof environment in crawl spaces.

3. Parameter GS-WF-16

PropertiesTypical Value
Common Thickness1mm, 1.5mm, 2mm, 3mm
Common Width1/2inch, 1inch, 2inch
Common Length30ft, 50ft, 90ft
Material100% Synthetic Butyl Rubber
ColorBlack, Gray, White

4, Product Application

Vapor Barrier Encapsulation: Joining and sealing wall liners in crawl spaces and basements.

Automotive & RV: Sealing windows, tail lights, and door membranes to prevent leaks.

Deck & Boat Repair: Protecting deck joists from rot and sealing boat hardware.

HVAC & Roofing: Sealing flange joints in ductwork and overlapping metal roof panels.

Vacuum Bagging: Used as a sealant tape (tacky tape) in composite manufacturing.

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