Vapor Barrier Tape - 4" × 180' Heavy-Duty Seam Poly Tape

SKU: CSVB-PT-WB

746 in stock

$21.00

Estimated standard delivery between January 06 and January 09. Order within . Upgrade for faster delivery at checkout.

  • Width: 4 inches
  • Length: 180 feet (60 yards)
  • Thickness: 9 mil
  • Type: PVC-style duct tape for crawl space applications
  • Adhesive: Aggressive, moisture-resistant
  • Backing: Heavy-duty cloth with PE coating
  • Color: White
  • Temperature Range: Designed for crawl space conditions
  • Application: Vapor barrier seam sealing, poly patching, stake covering
  • Coverage: Approximately 180 linear feet of seams per roll
  • One roll vapor barrier seam tape, 4" × 180'

We want you to be happy with your product!

Within 30 days of your order, we offer a 100% refund if a product was faulty, defective, or damaged in shipping and replacement is not feasible. While extremely rare, if we make a mistake we will also refund or replace the item.

New, unopened standard products may be returned within 30 days of delivery for a refund.

Restocking fees apply on opened boxes. Customer is responsible for return shipping costs for preferential returns.

Vapor Barrier Tape - 4" × 180' Heavy-Duty Seam Poly Tape

Vapor Barrier Tape - 4" × 180' Heavy-Duty Seam Poly Tape

$21.00

$21.00

Crawl Space Engineered

PVC-style construction with moisture-resistant adhesive maintains bond strength in harsh crawl space humidity and temperature conditions—won't deteriorate like standard tape.

4-inch Coverage

Generous width provides complete coverage across vapor barrier seam overlaps, ensuring leak-free seal with fewer potential failure points than narrow tapes.

9 Mil Heavy-Duty

Professional-grade 9 mil thickness offers excellent conformability and tear resistance while maintaining flexibility for long-term performance in crawl space conditions.

Multiple Applications

Seals poly seams, covers stakes and staples for finished appearance, patches tears, and reinforces high-stress areas around doors and penetrations.

Vapor Barrier Tape - 4" × 180' Heavy-Duty Seam Poly Tape

Permanent Seam Protection

This professional-grade vapor barrier tape is specifically engineered for sealing crawl space polyethylene seams in harsh, high-humidity environments. At 4 inches wide and 9 mils thick, this heavy-duty PVC-style tape creates permanent, moisture-resistant bonds that are essential for proper vapor barrier installation and encapsulation integrity.

Professional Installation Essential

Clean and dry poly surfaces before application for maximum adhesion. Overlap vapor barrier seams by 6-12 inches and apply tape down the center of the overlap. Press firmly to ensure complete contact—use a hand roller for best results. Apply in temperatures above 50°F for optimal adhesive activation.