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Crawlspace-DIY Vapor Barrier Tape, 12 Mil Easy-to-Use Polyethylene Moisture Vapor Barrier Seam Tape for Crawl Space, Repairs, Underlayment, Waterproof, 4″ x 180′
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Crawlspace-DIY Vapor Barrier Tape, 12 Mil Easy-to-Use Polyethylene Moisture Vapor Barrier Seam Tape for Crawl Space, Repairs, Underlayment, Waterproof, 4″ x 180′

$24.99

Key Features

Heavy-Duty 12 Mil Polyethylene Construction
Designed for durability in crawl space and moisture control environments where long-lasting seam protection matters.

Strong Adhesive for Secure Sealing
Creates a dependable bond for sealing vapor barrier seams, patching tears, and reinforcing overlap joints.

Ideal for Crawl Space Encapsulation
Perfect for crawl space vapor barriers, basement moisture barriers, underlayment applications, and general moisture control projects.

Easy DIY Installation
Simple peel-and-apply application makes repairs and seam sealing fast for homeowners and contractors alike.

Large Coverage Roll
4 inches wide x 180 feet long for extensive seam sealing, vapor barrier repairs, and encapsulation installations.

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Eligible for return, refund or replacement
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Description

CrawlSpace-DIY Vapor Barrier Tape – 4″ x 180′

Seal seams, patch tears, and create a stronger moisture barrier with CrawlSpace-DIY Vapor Barrier Tape. Designed for crawl space encapsulation and vapor barrier repairs, this 12 mil polyethylene seam tape delivers a durable, long-lasting seal to help block moisture intrusion in crawl spaces, basements, under concrete slabs, and other moisture-prone areas.

Built for easy installation, this high-performance crawl space vapor barrier tape features a strong adhesive backing that bonds securely to compatible vapor barriers, making it ideal for sealing overlaps, repairing punctures, and reinforcing seams during encapsulation projects. Whether you’re a contractor or tackling a DIY crawl space encapsulation project, this tape helps create a cleaner, tighter moisture barrier system.

With a generous 4-inch width and 180-foot roll length, you get ample coverage for large encapsulation jobs, repairs, and underlayment seam sealing.

Key Features

Heavy-Duty 12 Mil Polyethylene Construction
Designed for durability in crawl space and moisture control environments where long-lasting seam protection matters.

Strong Adhesive for Secure Sealing
Creates a dependable bond for sealing vapor barrier seams, patching tears, and reinforcing overlap joints.

Ideal for Crawl Space Encapsulation
Perfect for crawl space vapor barriers, basement moisture barriers, underlayment applications, and general moisture control projects.

Easy DIY Installation
Simple peel-and-apply application makes repairs and seam sealing fast for homeowners and contractors alike.

Large Coverage Roll
4 inches wide x 180 feet long for extensive seam sealing, vapor barrier repairs, and encapsulation installations.


Ideal Applications

  • Crawl space encapsulation
  • Vapor barrier seam sealing
  • Vapor barrier repairs
  • Basement moisture barriers
  • Under slab moisture barrier projects
  • Poly sheeting seam reinforcement
  • Underlayment seam sealing

Additional information

Weight 3 lbs
Dimensions 7 × 7 × 5 in

4 reviews for Crawlspace-DIY Vapor Barrier Tape, 12 Mil Easy-to-Use Polyethylene Moisture Vapor Barrier Seam Tape for Crawl Space, Repairs, Underlayment, Waterproof, 4″ x 180′

  1. Faye Jaime (verified owner)

    Very strong sticky tape. Works great. Buy more then you think because once it sticks to itself it’s nearly impossible to separate. And having good scissors makes a world of difference, but have paint thinner or some kind of goo remover on hand as your scissors will bind after a bit of cutting.

  2. Julie layton (verified owner)

    Love this tape, it is super heavy duty, after I had taped all my seams my crawl got full of water twice and this tape held up all the way…..

  3. Mark Wirgau

    This is the best Tape I have ever used !!

  4. wendy.ruder

    This isn’t just any tape. The quality is immediately noticeable – it’s a premium polyethylene-backed tape with a strong, aggressive adhesive that bonds seamlessly to plastic sheeting. The 4-inch width effortlessly covers overlaps, for precise, mess-free application in tight spaces, creating waterproof joints that lock out moisture and air infiltration.
    Aesthetically, the white hue matched my plastic sheeting perfectly, creating seamless, professional-looking bonds that elevate the whole setup from DIY to polished. While it is too soon to speak about its durability, you can tell it’s built to last a long time.
    This tape paired perfectly with the butyl tape from the same seller – two indispensable essentials that brought my DIY crawl space encapsulation project to a seamless finish.

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    Frequently Bought Together

    Crawlspace-DIY Vapor Barrier Tape, 12 Mil Easy-to-Use Polyethylene Moisture Vapor Barrier Seam Tape for Crawl Space, Repairs, Underlayment, Waterproof, 4" x 180' + whitecap premium 12MIL + AprilAire E050 Pro Dehumidifier Bundle - 50 Pint Crawl Space Dehumidifier - Compact Dehumidifier for Crawl Spaces, Basements, Attics, Garages up to 1,600 sq. ft - 5 Year Warranty
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