KOVARA® AB 300 Moisture Barrier Flooring Underlayment

KOVARA® AB 300 membrane is a patent-pending, self-adhered, pre-fabricated moisture barrier designed to protect floor coverings from staining, warping and adhesive deterioration that may result from water vapor emissions and alkaline salts infiltrating through the concrete slab.

KOVARA® AB 300 membranes self-adhere directly to the concrete subfloor with its own specialty designed moisture and alkaline-resistant adhesive suitable in conditions up to 99.50% relative humidity. The unique adhesive bond addresses membrane movement or buckling when heavy rolling loads and heavy foot traffic are expected. The unique adhesive is protected by a split release liner until placement.

• Installation in a fraction of the time of fluid-applied moisture barriers
• Self-adhered to subfloor with a specialty designed adhesive to prevent movement under heavy rolling loads and foot traffic
• Split adhesive release liner allows quick peel-and-stick application
• Reduced labor costs and improved project capacity for contractors
• Reduced downtime and business disruption for building owners
• Does not require an intact under slab vapor barrier (ASTM-E-1745)
• No shot blasting or surface grinding required
• Self-leveling surface preparation only needed for uneven floors
• Backed by 10-year limited replacement warranty (details below)
• Patent pending

Thickness : 41 mils (not including 2 mil release liner)
Roll Size : 5’ x 100’ (500 sq. ft.)
Roll Weight : 90 lb.
Shelf Life : 1 year
Pallet quantity : 12 rolls

KOVARA® AB 300 membranes can be used under any of these approved floor coverings:

• Carpet tile
• VCT - vinyl composition tile
• LVT / LVT - luxury vinyl tile / luxury vinyl plank
• Homogeneous sheet vinyl
• Rubber flooring
• Engineered wood
• Laminate flooring
• Bamboo
• Resilient sports flooring

The following specialty floors require review to verify existing conditions and use to ensure the best installation; please contact your local GCP flooring sales rep or GCP Technical Services for review:

• Heterogeneous sheet vinyl
• Ceramic tile
• Porcelain tile
• Natural Stone
• Broadloom carpet
• Wood court flooring

For each roll of KOVARA® AB 300 membranes, the following additional installation components are required for sealing seams:

• 1-2 rolls of KOVARA® Double-Sided Tape
• KOVARA® MBX Topical Seam Tape is not required for KOVARA® AB 300 installations

Read and understand the product label and Safety Data Sheet (SDS) for each system component. All users should acquaint themselves with this information prior to working with the products and follow the precautionary statements. SDSs can be obtained by contacting GCP toll free at 1-866-333-3SBM (3726).

KOVARA® moisture barriers are backed by a limited 10-year replacement warranty. You can find the entire KOVARA® AB 300 membrane warranty information at gcpat.com, or contact your GCP Applied Technologies sales representative for details. KOVARA® AB 300 is not designed or warranted for use in resisting liquid water pressure, a condition referred to as Hydrostatic Pressure. Therefore, do not use KOVARA® AB 300 where standing water or glistening water is present on the slab.

KOVARA® AB 300 membrane customers benefit from GCP’s Technical Service team, providing field support for successful job completion. Please contact GCP with any questions on the proper use of KOVARA® products on 617-499-2822.

See More

See Less