When an acrylic sealer turns white, it is a sign that the sealer has delaminated, or lost its bond, with the surface. There are a few very specific scenarios that can cause an acrylic to turn white.
The first and most common reason acrylic sealers turn white is when the acrylic sealer is introduced to water or moisture during the curing process. To avoid acrylic sealers from turning white it is important to apply the sealer to a completely dry surface, and keep the surface dry for at least 24 hours after applying.
A second reason an acrylic sealers turns white is when the sealer was applied in the early morning or middle of the day when air and surface temperatures are above the suggested application temperature range. If the carrying agent evaporates before the sealer can fully cure, the sealer will delaminate. To avoid acrylic sealers from turning white from premature evaporation, apply the acrylic sealer in the late afternoon or early evening when air and surface temperatures are declining, and when the surface is no longer in direct sunlight. It is also important to follow the temperature guidelines provided with the sealer.
A third reason an acrylic sealer turns white is when the acrylic sealer was applied over an incompatible product. The best way to avoid acrylic sealers from turning white due to a compatibility issue is to ensure the acrylic sealer is applied to an unsealed surface or is compatible with the sealer that is currently down.
A fourth reason an acrylic sealer turns white is when the surface itself, or a surface contaminant, prevented the sealer from being able to properly penetrate and bond. The best way to avoid acrylic sealers turning white from an inability to penetrate is to make the sure the surface is properly cleaned and prepped before application.
If a solvent based acrylic sealer has turned white from moisture or premature evaporation, simply wait 24 hours and roll over the white area with Xylene to re-emulsify the sealer and allow it to properly cure. If a solvent based acrylic sealer has turned white due to an incompatibility or penetration issue, the sealer will have to be removed and reapplied to a properly prepped surface.
If a water based acrylic sealer has turned white for any reason, it will have to removed and reapplied to a properly prepped surface. If you have any questions, please reach out to a Foundation Armor technician!