Installation Instructions

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Installation Detail

Surface Preparation

Surface must be structurally sound, clean, dry and free

from dirt, oil sealers or any contaminants that would

prevent a good bond. CeraZorb must acclimatize in

their sealed packaging for 48 hours at a temperature

of 65 degrees.

Concrete Slab
Inspect concrete sub floor for any open cracks and
fill with a high grade patch.  Remove any excess
concrete lumps or residue that may interfere with the
installation of CeraZorb. The concrete slab should be
fully cured, dry, smooth, flat, and accept water
penetration. Concrete must be free of efflorescence
and not subject to hydrostatic pressure. A good quality
concrete waterproof sealer may be required if moisture
in the slab is above 10%.  

Gypsum Substrates
Gypsum substrates must have a PSI greater than 2000
and must be first primed or sealed per manufacturer’s

Wood Substrates
The sub floor should be permanently dry, smooth,
flat, and clean free from dirt, grease, wax, paint,
oil or anything that would hinder a good bond.
Plywood sub flooring should be of a good grade. 
Variations in floor level over 1/8” within a 3 foot
span should be leveled before installing underlayment. 
Any nails or other protrusions should be pounded flat

or removed. Sub floor should have L360 for deflection.


Product Information


Bonding Material

CeraZorb is bonded to the sub floor with Impacta T-700

bond coat adhesive. Use a 1/8" x 1/8" x 1/16" V-Notched

trowel. Apply only enough adhesive as can be covered by

a 4' x 4' sheet.  Clean up any extra before the adhesive

skins over.  Impacta T-700 and the sub floor must be at 65-degree Fahrenheit.

Install CeraZorb
Set the CeraZorb into the adhesive while it is still wet. 
Do not allow adhesive to skin over.  Lift a corner periodically to see if the adhesive is transferring 100%.  If adhesive is not transferring, apply additional adhesive.  Flat trowel the CeraZorb to smooth out air pockets.  Continue to install CeraZorb sheets making sure to install with edges butted tight to each other, do not overlap seams.  After first row is completed, roll the mat with a 35 lb roller. Install second row with staggered seams to the first row and repeat steps above.  It is recommended to wait 8-12 hours before installing tile on top of CeraZorb. 

Installation of Tile, Stone or Marble
Before installation of the flooring, install CeraZorb perimeter isolation strips with PSA backer or cut 1" wide by 4' lengths off the sheet.  Fasten the perimeter strips to the wall of the entire sub floor use T-700 or mastic if cutting strips.  Make sure to follow applicable ANSI A.108/A.118/A.136 for proper installation of ceramic tile. When applying tiles to CeraZorb always use a polymer-modified mortar meeting ANSI A118.4 or A118.11 standard.  It is recommended to key-in/burn-in a thin layer of thin set into the surface of CeraZorb as a first step to tiling. 

After finished floor is installed and grouted, trim the excess perimeter isolation strip flush with the floor.  Prior to installation of cove or base molding seal isolation foam with either Sound Seal acoustic caulk or any waterproof acrylic caulk.  Adhere the base or cove to the wall.  The base board must not touch the floor to  avoid sound/vibration to flank through the walls.

SKU # Description  
97150580305 25 sheets CeraZorb 4' x 4', 400 sq ft per box

97150580405  Perimeter isolation strips, 1 ˝” x 4’ with Peel & Stick backer – 25 strips per box 100 linear feet)

97150580370  4 gal bucket Impacta T-700 bond coat adhesive    (90-108 sq ft per gallon coverage