2-Sided Butyl Tape

Americover® 2-Sided Butyl Tape — Reinforced Double-Sided Sealing Tape

Built for vapor barriers, plastic sheeting, and demanding construction seals. Americover’s 2-Sided Butyl Tape is a heavy-duty, double-coated butyl sealing tape engineered to deliver aggressive, long-lasting adhesion on both smooth and textured surfaces. With a reinforced cloth carrier and high-tack butyl rubber adhesive on both sides, this tape creates an airtight, watertight bond that holds up under jobsite conditions — without the rubberband effect that plagues non-reinforced butyl tapes.

💡 Best fit: Crawl space vapor barrier seams, plastic sheeting overlaps, containment seals, and any application where a permanent, airtight bond between two substrates is non-negotiable.

Features and Benefits

Reinforced Cloth Carrier — No Rubberband Effect

Most butyl tapes stretch and recoil during application, which creates uneven seams and gaps. However, the reinforced cloth backing in Americover’s 2-Sided Butyl Tape eliminates that rebound, so the tape lays flat, holds its shape, and bonds where you put it. As a result, your seam lasts instead of failing inspection.

Aggressive Double-Sided Butyl Adhesive

Butyl rubber on both sides delivers high-tack bonding to polyethylene, steel, concrete, wood, and most construction substrates. Furthermore, adhesion to PE measures 256 oz/in per ASTM D903, which gives you a permanent seal on vapor barriers, crawl space liners, and reinforced plastic sheeting.

Quick-Release PET Liner

The 2-mil release-coated PET film peels cleanly without tearing or leaving residue. Consequently, crews work faster, with less waste and less frustration on long seam runs.

All-Temperature Performance

Application range of 30°F to 180°F and operating range of -30°F to 200°F means the tape stays flexible in cold weather and stable in summer heat. Therefore, crews can install year-round in most climates.

Hand-Tearable, Tool-Free Installation

Tear by hand on the jobsite — no knife, no scissors. This speeds up installation in tight crawl spaces, on ladders, and in containment areas where pulling out tools slows the work down.

Made in USA

Americover manufactures this tape in the United States to consistent quality standards. In addition, BABA-compliant options are available for government and infrastructure projects on request.

🌱 Ideal for: general contractors, vapor barrier installers, crawl space encapsulation crews, abatement and remediation contractors, and HVAC professionals sealing ductwork and penetrations.

Why Reinforced Butyl Tape Matters

Standard butyl tapes use a thin film carrier or no carrier at all. As a result, they stretch under tension, snap back when released, and create inconsistent seams that fail moisture and air-tightness testing. A reinforced cloth carrier, however, changes the geometry of the install — the tape stays where it lands, holds dimensional stability through temperature swings, and resists tearing when crews pull the liner.
For vapor barrier seams under slab, in crawl spaces, or across plastic sheeting overlaps, that dimensional stability is the difference between a seam that passes a blower door test and one that needs a redo.

💰 Save time and rework. One pass with reinforced 2-sided butyl tape replaces caulk-and-overlap methods that take longer and fail sooner. As a result, crews see fewer callbacks and faster inspections.

Common Applications

• Crawl space vapor barrier seam sealing and overlap bonding
• Under-slab vapor barrier and radon mitigation membrane seams
• Bonding plastic sheeting, reinforced poly, and laminated substrates
• Containment sheeting seals for abatement and remediation work
• Sealing penetrations, pipes, and column boots in vapor barrier systems
• Noise and vibration damping in HVAC and mechanical assemblies
• Air sealing — eliminating air infiltration at seams and transitions
• Waterproofing and weatherproofing for envelope and below-grade work
• Sealing ductwork seams and joints in mechanical installations

🌑 Need a vapor barrier to seal? Pair this tape with a heavy-duty vapor barrier from our resource page to build a complete moisture control system for crawl spaces, slabs, or encapsulation projects.

Technical Specifications

Frequently Asked Questions

What is 2-sided butyl tape used for?

Contractors use 2-sided butyl tape to create permanent, airtight, watertight bonds between two substrates — most commonly for sealing vapor barrier seams, joining plastic sheeting overlaps, sealing penetrations in containment systems, and damping noise or vibration in mechanical assemblies. Additionally, the double-sided butyl adhesive bonds aggressively to polyethylene, steel, concrete, and most construction surfaces.

How is reinforced butyl tape different from regular butyl tape?

Reinforced butyl tape has a cloth carrier embedded between the two adhesive layers. As a result, it eliminates the rubberband effect — the stretch-and-recoil behavior of non-reinforced butyl tapes that creates uneven seams and gaps. Furthermore, reinforced tape stays dimensionally stable during installation and over time, which produces seams that pass air-tightness and moisture testing.

What temperature does butyl tape need to be applied at?

Americover’s 2-Sided Butyl Tape has an application temperature range of 30°F to 180°F (-1°C to 82°C). For best adhesion, apply at 50–60°F or warmer. Moreover, in colder conditions, crews can warm surfaces and tape with an industrial hot-air blower to bring them into the optimal range. Once installed, the tape operates from -30°F to 200°F.

💡 Pro tip: Surfaces must be clean, dry, and dust-free. Therefore, wipe down with a dry rag before applying — even a thin layer of dust dramatically reduces adhesion. In humid or cold conditions, warm the substrate before bonding.

Will this butyl tape bond to polyethylene vapor barriers?

Yes. ASTM D903 testing rates adhesion to polyethylene at 256 oz/in on the air side, which ranks among the strongest bonds available for poly-to-poly seam sealing. As a result, this tape works well for crawl space vapor barriers, under-slab moisture barriers, and reinforced plastic sheeting overlaps.

How long does butyl tape last?

Shelf life runs 36 months from the date of manufacture when stored at 60–80°F and 40–60% relative humidity. Once installed in a properly prepared seam, butyl tape provides long-term adhesion for the service life of the vapor barrier or sheeting system. However, real-world longevity depends on substrate condition, surface preparation, and exposure.

Is this butyl tape made in the USA?

Yes. Americover manufactures this 2-Sided Butyl Tape in the United States. In addition, BABA-compliant options are available for federally funded infrastructure projects — contact your account manager at 800-747-6095 or sales@americover.com to confirm requirements for your project.

Can I order custom sizes or volume quantities?

Standard rolls measure 1.5″ x 108′. For volume pricing, custom widths, or project-specific quantities, contact Americover at 800-747-6095 or sales@americover.com. Furthermore, every customer gets a dedicated account manager who can match the right product to your project.