Concrete sealers will prevent Rust Bullet Concrete coatings from achieving good adhesion to the surface. In most cases, the surface will need to be ground to remove this sealer and create a profile for adhesion. This can be done mechanically or by hand and a basic adhesion test should be performed prior to application.
Removing a concrete sealer by grinding involves several steps and requires the right tools and materials. Here’s a general guide:
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Preparation:
- Clean the concrete surface thoroughly to remove any debris, dirt, or grease.
- Ensure the area is well-ventilated and wear protective gear (gloves, mask, goggles).
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Tools:
- Use a concrete grinder or a floor polisher with a diamond grinding wheel.
- Ensure the grinder has dust collection capabilities to minimize dust spread.
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Grinding Process:
- Start with a coarse diamond grinding wheel (16-30 grit) to break through the sealer layer.
- Make multiple passes over the concrete surface, ensuring even coverage.
- Gradually move to finer grit wheels to smooth the surface and remove any remaining sealer residue.
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Cleanup:
- Vacuum the area to remove dust and debris.
- Optionally, rinse the surface with water and allow it to dry completely.
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Inspection:
- Check for any remaining sealer spots and repeat grinding if necessary.
Note: The amount of grinding needed depends on the thickness of the sealer and the concrete’s condition. It can be a labor-intensive process, so take breaks and ensure the equipment is used correctly to avoid damage to the concrete.