For a detailed answer, see our blog post here on this topic.
Most concrete sealers when properly installed and cured will be completely chemically compatible with Seal Bond 95 and Seal Bond 220 Adhesives. The real question is how will the system (which is comprised of the actual concrete floor, sealer, adhesive and specific pedestal) perform relative to the engineering specification of a particular project. If sufficient force is applied (Overturning Moment Test) will the adhesive be stronger than the coating to the concrete and pull the sealer off the floor? Since there are literally hundreds of sealers on the market the only answer is to test the actual components for each job (yes, concrete varies). In many cases, adhesion of the Seal Bond Pedestal Adhesive can be improved by scuffing the floor sealer. This activity will modify the surface of the sealer and promote anchoring of the adhesive.
Common concrete sealers used in Access Flooring can be divided into two categories. The first category is topical sealers, which form a continuous membrane on top of the concrete. An example of a topical sealer is a two-part epoxy coating, such as our MA-200 High Build Epoxy Color Coat. The second category is penetrating sealers that penetrate the pores of concrete the concrete substrate rather than forming a membrane on the concrete surface. When Seal Bond Adhesive is applied over a penetrating sealer it can bond to the surface of the concrete directly (preferred) rather than to the membrane which is present with a topical sealer. Silicone concrete sealers should always be tested, prior to installation.
When using Seal Bond 95 or Seal Bond 220 we always recommend performing a field test to determine the final performance of the access flooring system.