Backer Board

The integrity of your tile is only as good as its foundation. The new KBRS K-Board is the most cutting-edge backer board on the market. It’s a strong, lightweight, waterproof, and vapor-resistant tile base for wet areas. K-Board is an XPS foam panel manufactured with a waterproof proprietary blend of synthetic polymer mortar and an alkali-resistant fiber mesh. This gives it a highly rigid structure and exceptional bonding strength.


Using K-Board to build walls over stud framing in wet areas is an efficient alternative to using gypsum board. While cement backer boards are moisture-resistant – unlike K-Board – they are not waterproof. So, additional measures must be taken to protect wall cavities from water and vapor penetration.

Easy to Handle

Stop worrying about working with your backer board. You’ll enjoy itch-free handling with K-Board. Plus, it’s lightweight, making it easy to carry multiple boards from the truck, up the stairs, then easily screw into place with no bowing or bending.

KBRS Backer Board Technology

With its special properties, the KBRS Backer Board has a wide variety of applications. Use it as a carrier element, as an adhesive surface, for moisture protection, as a design feature, for composite sealing and more.

  • alkali-resistant glass fiber mesh
  • polymeric cement mortar
  • XPS Foam
  • 4" X 4" X 61"
    RTT - HC - 61
  • 4" X 4" X 61" KBRS HardCurb®
    Anchors Glass Doors, Block & More!
    Just Add Tile

Install Guide
Product Specifications found on the "Document Library" page

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