What would cause a concrete sealer to delaminate?
There is no quick and easy answer, since most sealer failures can be caused by multiple factors. However, one thing common to most sealer delamination failure is due to concrete that is too smooth or nonporous. This is especially true in the case of thin cementitious overlays. The sealer (or overlay) needs to bite or penetrate into the substrate for proper adhesion. Slick bare concrete surfaces or surfaces that have been previously sealed with film forming sealers should be stripped or prepared with a light acid wash prior to sealing.
Other factors that can inhibit a sealer from proper bonding: Over-application of the sealer, which creates high surface tension and surface buildup. Heavy applications are not better. Penetrating sealers must be applied in a nice “thin” coat to allow proper penetration.
To much moisture present in the pores of the concrete, which greatly reduces adhesion and can cause many other problems. Make sure your surface is “bone dry”. (No rain or water from the sprinkler system). The surface is too cold or hot. The ideal concrete temperature range for most sealer applications is 40+ to 90 degrees F.
To ensure your concrete drive, patio, sidewalk or other is sealed properly give Aqua Pro Cleaning Solutions a call and we will provide you a quote today!
