Vapor Barriers for Concrete Contractors

Looking for reliable Vapor Barriers for Concrete Contractors to protect your slabs from moisture damage? At Concrete Tools Direct, we carry trusted Stego® vapor barriers and accessories — including wraps, tapes, mastic, and edge products — all designed for long-lasting, contractor-grade performance. Build a complete barrier system that keeps water out and your structure safe. Fast U.S. shipping and no sales tax (except TX) make it easy to get the protection you need on every jobsite.

8 products

Top-Rated Vapor Barriers for Concrete Contractors

Top Models/Feature Picks
Our experts selected these contractor-approved vapor barriers for their reliability, moisture protection, and ease of installation. Whether you’re working on residential slabs, commercial floors, or industrial projects, these products provide a durable, long-lasting moisture barrier.

Stego Tape - Seal, Bond and Patch | 3.75 x 180 | 12 Pack ($48/roll)

Stego® Tape is the ultimate solution for professionals seeking reliable and efficient vapor barrier seam tape. Designed specifically for sealing, bonding, and patching, this tape excels in applications where a highly conformable and pressure-sensitive material is essential.
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Stego Wrap Vapor Barrier (20 Mil) | 14 x 105

The Stego Wrap 20 mil polyethylene vapor barrier offers superior protection against moisture for commercial, residential, and industrial applications.
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Stego Wrap Class A Concrete Vapor Retarder (10 Mil) | 14 x 210

Stego Wrap Class A 10-Mil Vapor Retarder is the ultimate 10 mil plastic vapor barrier designed to provide superior moisture protection for below-grade applications.
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How to Choose the Right Vapor Barrier for Concrete Contractors

When selecting a vapor barrier, consider your project type, slab size, and moisture protection needs. The right barrier ensures long-lasting performance, protects against water damage, and helps your structure stay safe and durable.

Barrier Material

Choose from polyethylene films, reinforced vapor barriers, or specialty membranes depending on the project’s moisture exposure and durability requirements.

Thickness

Thicker barriers, like 15- or 20-mil, provide extra protection for high-traffic or commercial projects, while 10-mil options are suitable for residential slabs.

Installation Method

Some barriers require tape, mastic, or mechanical fastening for seams and edges. Proper installation ensures full moisture protection and system reliability.

Compatibility

Ensure the vapor barrier works with your slab, insulation, and any embedded systems like radiant heating or plumbing to prevent leaks and damage.

Durability

Look for contractor-grade, tear-resistant products that withstand foot traffic, equipment, and concrete placement during construction.
No matter the scale of your project, the right concrete vapor barrier protects your slab and structure from moisture damage. Explore our full range to find the system that meets your construction and contractor needs.

Frequently Asked Questions

FAQ’s

What are Vapor Barriers and why are they important?

Concrete vapor barriers are materials installed under slabs to prevent moisture from rising into the concrete. They protect floors, coatings, and structures from water damage, mold, and deterioration, ensuring long-lasting performance.

Which thickness of vapor barrier should I use?

For most commercial and residential projects, Stego® Wrap barriers come in 10, 15, and 20-mil thicknesses. Thicker barriers provide enhanced durability for high-traffic or industrial applications.

How do I properly install a concrete vapor barrier?

Start by laying the barrier smooth on the subgrade, overlapping seams as recommended, and sealing joints with Stego® Tape or StegoTack®. Use STEGO® TERM BAR along walls and edges, and secure penetrations with Stego® Mastic.

Can vapor barriers be used with pipes and penetrations?

Yes. Stego® Mastic and Crete Claw® Tape provide a tight, flexible seal around pipes, conduits, and edges to maintain a continuous moisture barrier throughout the slab.