The best highConcrete Sealed with a High Gloss Sealer gloss concrete sealer for your concrete will depend on whether or not you are sealing interior or exterior concrete, and whether or not you are sealing unsealed concrete or concrete with a coating currently on it.

The three best high gloss concrete sealers for exterior concrete are:

The above high gloss concrete sealers penetrate into the concrete where they create an aggressive bond to the concrete from within the pores. They protect the concrete against staining and deterioration caused by water absroption and surface abrasion, and will help to reduce mold and mildew, and efflorescence. The protective high gloss film left behind is UV resistant, and will provide up to 2-5 years of life before the need to recoat on an exterior application, and 3-7 years of life on an interior application.

High gloss concrete sealers can be applied to unsealed concrete, or concrete previously sealed with a compatable product. If you are sealing concrete that currently has a high gloss sealer on it, it is important to keep in mind that solvent based high gloss sealers need to recoat solvent based high gloss sealers, and water based high gloss sealers need to recoat water based high gloss sealers. 

Applying High Gloss Concrete Sealer

Not all concrete is the same, and not all sealers are the same, which is why not all levels of gloss are the same. You should always follow the instructions give to you by the manufacturer, but here are a few application tips:

  • High gloss concrete sealers should be applied to concrete that is clean and completely dry. Dry being key. If a pressure washer was used, or if it recently rained, concrete should be allowed to dry for at least 24 hours. Once the high gloss concrete sealer is applied, the surface should remain free from water for at least 36-48 hours.
  • Tow coats are always suggest to achieve the highest level of gloss. Water based coats have a very strict recoat window, but solvent based acrylics should space the coats out 24 hours. 
  • Apply the sealer in the late afternoon or early evening so that the concrete has been given sufficient time to cool down from being exposed to the sun. If a high gloss sealer is applied to a hot surface, bubbles and blisters can occur in the coating. It is also important to avoid applying the high gloss sealer in the morning when dew can be present on the surface and within the pores.

Re-Coating Previously Sealed Concrete

It is perfectly fine to seal concrete previously sealed with another type of concrete sealer, so long as the new sealer is compatable with the old sealer.

  • Silicate Concrete Sealer - If your concrete is sealed with a silicate concrete sealer you can reseal the concrete with a water or solvent based acrylic sealer.
  • Silane-Siloxane Concrete Sealer - If your concrete is sealed with a Silane-Siloxane concrete sealer you can reseal the concrete with a solvent based acrylic sealer. The water repellent sealer will bead water based products off the surface, which is why only a solvent based acrylic sealer can be used.
  • Water Based High Gloss Acrylic Concrete Sealer: Water based acrylic sealers should be recoated with a water based acrylic sealer to avoid coating failure. 
  • Solvent Based High Gloss Acrylic Concrete Sealer: Solvent based acrylic sealers should be recoated with a solvent based acrylic sealer to avoid coating failure.