Surecrete XS-327 Polyurethane Concrete Countertop Sealer
XS-327 is a water-based 2-component polyurethane sealer designed for application over concrete surfaces like concrete countertops, cement-based terrazzo, and fiber reinforced concrete. XS-327 surpasses the abrasion resistance of most solvent-based sealers while providing the safety of a non-flammable, low VOC water-based concrete sealer.
- Gather all of the tools and supplies needed to complete the process.
- XS-327 Sealer, mixing containers, drill motor, mixing paddle, roller, and short-nap mohair roller covers.
- Combine 3 parts “A” with 2 parts “B” in a plastic mixing container.
- Don’t mix up more than you can use in 1 hour .
- Thoroughly mix part “A” and “B” for THREE minutes with an electric drill motor fitted with a 1 gallon paint mixer.
- Use a paint mixer that is designed for small containers of paint. Larger mixers can introduce too much air to the mixture.
- Dilute sealer mixture for prime coat according to the following proportions. One part sealer mixture and seven parts water.
- Mix thoroughly for another three minutes before applying to the concrete surface.
- Deluge the entire concrete surface with the XS-327 sealer dilution. Keep the entire surface saturated for 5 minutes. So customers prefer to using a spray bottle for this first application to avoid uneven penetration of sealer which can result in visible "pour lines" in the finished surface.
- If the surface begins to dry-out or becomes sticky, add more sealer dilution to the keep the surface saturated.
- While applying the sealer, foam will be produced by the action of the high-density foam roller.
- DO NOT BE ALARMED, the foam is normal and a good indication that you have enough sealer on the surface.
- Push all the foam off the concrete surface using heavy pressure on the roller.
- Roll all excess sealer out of the roller onto a clean paper towel.
- You may need to do this periodically to keep the roller from becoming too saturated with sealer.
- Continue rolling the entire concrete surface until almost dry.
- This can take several minutes but is important for achieving a smooth even finish.
- Repeat steps five to nine with a sealer dilution of two parts water and one part sealer.
- Lightly sand the surface, between coats, with a 200 grit sand paper if the previous coat was placed more than 24 hours ago.
- Continue rolling until all the sealer has been worked into the surface or absorbed by the roller.
- If small bubbles are still appearing in the finish like you see here, continue rolling until the surface is smooth and almost dry.