CTEF Blog – About Tile Education and Installer Certification

What Can Prevent a Tile Bond?

A bond breaker is defined in the NTCA Reference Manual as,

“Any material preventing adhesion.”

Examples of these contaminants or impurities include dust, dirt, sealers, coatings, existing adhesives, residue from previous products installed, oil, wax grease, paint, curing compounds, loose particles, drywall dust and even standing water.

According to Bond Breakers | Concrete Slab Bond Breakers, you also need to be concerned about finishing techniques. More specifically,

“Finishing techniques along with the use of some types of concrete additives can also affect the ability of a mortar to form a good bond. Steel or rotary troweled concrete produces a dense, glass-like surface which makes it difficult for a mortar to develop a mechanical or adhesive bond. Concrete additives along with finishing techniques can also produce a very dense concrete surface.”