DRYLOK, produced by United Gilsonite Laboratories, is a concrete and masonry waterproofing product that you apply directly to concrete and brick with brushes, rollers or paint guns. Recommended for waterproofing and sealing retaining walls, fish ponds, basements and foundations, uses also extend to decorative concrete paint projects in low-traffic areas. The steps required for painting over DRYLOK products depends on whether you are placing the new paint on freshly painted DRYLOCK, or on top of old DRYLOK product.
Apply the DRYLOK product according to the manufacturer's instructions.
Allow the DRYLOK paint to dry 3 hours between coats to allow the first layer to bond to the underlying surface.
Apply the new paint to the DRYLOK coated surface between 3 and 5 hours after the DRYLOK has been applied, or after 2 weeks to allow for a full cure.
Brush on additional coats of new paint according to the new paint manufacturer instructions.
Scour the concrete or masonry surface with a wire brush to remove loose paint, paint particles and broken masonry.
Wipe off the surface of the DRYLOK paint with a household ammonia solution to remove any greasy residue, oils from hands or dirt. Wash the surface with a wet rag to remove any ammonia residue and allow to dry.
Apply the new paint according to manufacturer instructions for application. Several thin layers of paint, with manufacturer recommended drying times between applications, will be more resilient than a single thick layer of paint.
Allow the paint to dry and inspect areas for partial coverage. Reapply new paint as necessary.