What is EASYSeal BCS - ultimate guide

What is EASYSeal BCS - ultimate guide

EASYSeal BCS is a water-based polymer sealer and sand binder for concrete block paving. It stabilises jointing sand by binding it to the blocks and forms a protective surface film to help prevent sand washout, reduce weed growth, and resist water, oil, and general staining. The product is non-solvent, safe to use, and can be applied to dry or slightly damp surfaces (never wet or with standing water). Typical coverage is up to around 40 m² per 5 litres for a single coat, depending on porosity. Expect a matt to satin finish rather than a high-gloss wet look.

Pre-application planning and preparation

Timing and weather in the UK

• Choose a dry spell with no rain forecast for at least 24 hours after application.
• Do not apply if frost is expected, surface temperature is below 5 °C, or conditions are excessively hot.
• Avoid direct midday sun to prevent premature drying.
• For newly laid paving, allow weeks or even months for efflorescence and moisture to stabilise before sealing.
• Clean the surface at least a week in advance to monitor for efflorescence or re-emerging stains.

Cleaning and preparation

• Sweep away loose dirt, dust, and leaves.
• Wash thoroughly with a pressure washer or suitable cleaner, taking care not to blast jointing sand out of place.
• Treat any efflorescence and wait until no more appears.
• Rinse well to remove all detergent or cleaner residues.
• Allow the surface to dry fully.
• Top up joint sand where needed, brushing in kiln-dried sand and compacting into the joints.
• Mask and protect nearby walls, plants, windows, and edges from splashes or overspray.

Test patch

• Apply the sealer to a small, inconspicuous area first.
• Leave 24–48 hours to confirm finish, sheen, and any colour change before proceeding.

Application method

What you need

• EASYSeal BCS (used neat, no dilution).
• Stirring stick or shaker to mix thoroughly.
• Roller, brush, or low-pressure sprayer.
• Clean, lint-free cloths for wiping excess.
• Gloves, protective eyewear, and suitable clothing.
• Water and mild detergent for tool cleaning.

First coat

• Start at one corner and work back so you do not step on treated areas.
• Apply evenly at around 1 litre per 3 m².
• Work diagonally across joints to encourage penetration into the sand.
• Avoid puddling and wipe up any excess immediately.

Second coat

• Wait until the first coat is touch-dry, typically a few hours depending on conditions.
• Apply the second coat at right angles to the first for even coverage.
• Use a lighter rate of about 1 litre per 4–6 m².
• Apply within 3–24 hours of the first coat.
• Very porous surfaces may need a third coat.

Curing

• Protect from rain and moisture for at least 24 hours.
• Avoid foot traffic until cured, typically around 8 hours.
• Do not allow vehicle traffic for about 72 hours or until fully hardened.

Aftercare and maintenance

• Clean with mild, neutral detergents and avoid harsh chemicals.
• Use soft brushes or low-pressure washing to keep surfaces tidy.
• Remove oil or grease spills quickly before they penetrate.
• Inspect high-traffic areas regularly and re-apply locally if needed.
• Keep a small amount of leftover sealer from the same batch for spot repairs.

Troubleshooting

• Patchy finish: Usually uneven application or absorption. Apply consistently and mop up excess.
• Whitening or milky patches: Often from applying too thickly or over damp surfaces. Allow proper drying between coats.
• Peeling: Typically due to poor preparation or contamination. Ensure the surface is clean and dry before application.
• Weak performance: Can result from thin coverage or wear. Apply an additional coat or re-seal worn areas.

Best practices for UK use

• Apply in small sections to maintain control.
• Use a cross-rolling or cross-spraying technique for even coverage.
• Start early or work in shade during summer to avoid overly fast drying.
• On sloped driveways, work from the top down to reduce run-off.
• Clean tools immediately with warm, soapy water.
• Keep some product from the same batch for future repairs.

Quick checklist

1. Pick a dry 24-hour weather window and avoid frost or heat.
2. Clean thoroughly, treat stains and efflorescence.
3. Re-sand and compact joints if needed.
4. Apply a test patch.
5. Stir the product well and use neat.
6. Apply first coat evenly at ~1 L per 3 m².
7. Let dry, then apply second coat crosswise at ~1 L per 4–6 m².
8. Protect from rain, avoid foot traffic for 8 hours, no vehicles for 72 hours.
9. Maintain gently and re-seal worn spots as required.

Conclusion

EASYSeal BCS is a reliable, low-odour choice for protecting and stabilising block paving without the overly glossy look of solvent-based sealers. By cleaning and preparing properly, applying two even coats, and allowing full curing, you can achieve long-lasting results with excellent stain and sand resistance. Regular gentle maintenance and spot reapplications will keep your paving looking fresh, protected, and easy to maintain year after year.

Coverage rates and cure times are approximate and depend on temperature, porosity, and application method. Always read the manufacturer’s instructions and complete a test patch before full application.