How to Apply Cool Deck Coating | Surface Prep & Paint Steps

The coating reflects sunlight instead of absorbing it, solving the problem of burning bare feet and heat radiating into the house. Proper application—surface preparation and coat order—determines whether the job lasts five seasons or peels in five weeks. One wrong step, such as applying over a prior sealer or rushing dry times, causes system failure. Here is the correct sequence.

Can You Apply COOL! Over an Existing Sealer or Epoxy?

No—this is where most DIY attempts fail. The official technical data sheet states that any prior water-repelling membrane (previous clear sealers, epoxies, urethanes, or similar coatings) must be completely removed via chemical stripping, grinding, or sandblasting. After removal, clean the surface with Triple Crown Cleaner or another approved product using a pump garden sprayer, then pressure wash and dry fully. COOL! will not bond to a sealed surface; this step is not optional.

Tools, Materials, and Application Order

The system uses three products in sequence: COOL! base coats, then SealBack Clear Sealer. Use a ¾-inch nap roller for COOL! material and a ½-inch nap roller for SealBack coats, plus brushes for edges and detail areas. A drill mixer is required; hand-stirring cannot achieve the consistent blend specified.

The Full Step-by-Step Process

Work in dry conditions when the concrete is clean and fully dry from pressure washing. Application is best between 50 and 85 degrees Fahrenheit, ideally when temperatures are dropping rather than rising to ensure even curing.

1. Apply the first COOL! coat using a ¾-inch nap roller. Roll in one direction, then back-roll for even coverage. Let dry at least one hour.
2. Apply the second COOL! coat with the same roller, later the same day or the next morning before temperatures get too hot. Let dry at least one hour and up to two hours before moving to the sealer.
3. Apply the first SealBack thin coat using a ½-inch nap roller. Aim for a thin, even coat—do not flood the surface. Let dry one hour.
4. Apply the second SealBack thin coat with the same technique. This final layer locks in color and provides the protective wear surface. Let cure fully before heavy foot traffic or furniture placement.

After each SealBack coat, the surface should look uniformly glossy with no puddles or thin patches. If a section looks matte or streaky, a light pass with the nearly-dry roller before it dries can even it out. For product selection, our tested roundup of the best cool deck paint options reviews top formulations for durability and color retention. Encore Coatings’ documentation also notes the system works for deeply stamped concrete finishes, and for high-traffic or furniture-heavy areas, the sealant layer adds meaningful extra wear resistance.

Most Common Mistakes That Ruin the Finish

• Applying over a damp surface. Concrete must be bone-dry; trapped moisture causes blistering within weeks.
• Skipping removal of prior sealers or urethanes. The number-one failure point: if the old surface beads water, COOL! will not bond.
• Applying when the surface is too hot. Above 85°F, the material dries too fast and may crack or peel. Work in morning or on overcast days.
• Rushing coat intervals. The one-hour minimum between COOL! coats and between SealBack coats is required for proper film formation.

Protect adjacent surfaces—siding, coping, landscaping—with drop cloths before starting. The material is not formulated for removal from porous surfaces once dry.