Full Product Manual
Construction Guide | 9
APPLICATIONS
Product
Floors Countertops Walls Ceilings Exteriors
1/4" PermaBASE UltraBacker •• •• – – –
• • Recommended – Not Recommended
For installation instructions, see page 18.
PermaBASE
UltraBacker
®
The Best Rigid 1/4” Underlayment
ADVANTAGES
• Features lowest water-absorption rating of <8% (ASTM C473).
• Stays intact when exposed to water; will not rot,
disintegrate or swell.
• Helps inhibit mold growth with the highest possible score on
mold tests (ASTM D3273 and ASTM G21).
• Resists impact and remains dimensionally stable.
• Holds up to toughest conditions.
• Can be applied over new or existing countertops or as flooring
underlayment.
• Pre-manufactured panels save you time.
• Lifetime limited warranty: Interior application.
1. Fiberglass Mesh/Mat
2. EdgeTech
®
Reinforced Edge
3. Cementitious Core
4. Fiberglass Mesh
PermaBASE UltraBacker® Cement Board features a smooth mesh and mat surface that
creates a more rigid and easier to handle product and an improved surface providing
superior tile bond. Made of Portland cement, aggregate and berglass mesh, it provides
an exceptionally hard, durable surface that is ideally suited as an underlayment for
ceramic tile on oors, countertops, tub decks, and outdoor kitchen counters.
1
4
3
2
SIZES AND PACKAGING
Thickness, Width and Length Pieces per Unit
1/4” x 36” x 5’ (7.9 mm x 914 mm x 1,524 mm) 60










