Resiblock
Indian Sandstone Sealer Colour Enhancer
Complete Usage Guide

1. 1
   Confirm surface and jointing sand are thoroughly dry and clean

   Surface must be clean and free from oil, algae, dust and lime bloom. To check: scrape jointing sand to a depth of 5–10mm — if the sand is dry, so is the paving. Ensure sand is 2–3mm below the surface to avoid pick-up by the application roller.

2. 2
   Check weather — no rain within 8 hours

   Do not apply if rain is forecast within 8 hours, or in temperatures below 3°C or above 30°C. For temperatures outside this range, contact Resiblock's application department for special procedures.

3. 3
   Sweep paving thoroughly

   Ensure paving is thoroughly swept. Where applicable, ensure no jointing sand remains in the chamfers of the pavers.

4. 4
   Apply with a Resiblock application roller

   Apply to the surface using a Resiblock application roller. Remove any build-up in depressions with a clean roller or builder's sponge. Apply at 4–6 m² per litre (or 2–3 m² per litre where sand-filled joints are present).

5. 5
   Restrict access during cure

   No foot traffic for 3 hours after application. Do not allow full vehicle traffic for 24 hours — full chemical cure must take place before the surface is subjected to full traffic use.

6. 6
   Clean all tools immediately with RESICLEAN

   All uncured sealant and tools must be cleaned immediately using RESICLEAN only. Do not use other solvents. Wash with water and detergent afterwards.

Application rates vary depending on porosity but will be in the order of 4–6 m² per litre. Where the paving has a sand-filled joint (nominal 5mm), material usage should be increased to 2–3 m² per litre. Coverage rates apply to Indian Sandstone, Sandstone, Yorkstone and Limestone — contact Resiblock's Technical Department for other stone types.

In the container the product appears as a low viscosity prepolymer urethane with a hydrocarbon odour. Application will alter the appearance of the pavers by darkening the surface, enhancing the inherent colours — similar to the effect found after rainfall.

The surface must be clean and free from oil, algae, dust and lime bloom. Substrate must be dry — application to damp or wet surfaces can result in poor adhesion and discolouration. Jointing sand containing moisture can prevent bonding. Do not use if rainfall is forecast within 8 hours of project completion. For mortared joints, instructions relating to sand-filled joints can be disregarded. If pavers or joints have been previously treated with any other stabiliser or sealer, contact Resiblock's Technical Department prior to application.

On new work, a thorough sweep with a stiff broom is usually sufficient. If the surface has become partially weathered or contaminated, the area must be thoroughly pressure washed. Application to poorly prepared paving — particularly regarding dampness — can result in inadequate joint penetration, poor adhesion, or in exceptional circumstances discolouration and disbonding.

Ideally, at installation joints should only be half-filled with kiln-dried sand. The remaining sand may be added once the paving has dried, allowing final filling and compaction on the same day as sealing, ensuring the sand is completely dry for optimum absorption.

Thoroughly clean using a pressure cleaner to remove all algae, lichen, weeds, grass, food and drink stains, and surface grime. Allow at least 2 weeks between cleaning and application to allow the area to dry out fully and to check for lime-bloom reappearance.

Once thoroughly dry, re-fill joints using kiln-dried sand. Sweep in using a soft broom and completely remove all surplus sand.

• Resiblock application roller
• Clean roller or builder's sponge (for removing build-up in depressions)
• RESICLEAN for tool cleaning

1. 1
   Apply with a Resiblock application roller

   Apply to the surface using a Resiblock application roller at a rate of 4–6 m² per litre depending on porosity, or 2–3 m² per litre where sand-filled joints are present. Do not dilute the product.

2. 2
   Remove any build-up in depressions

   Remove any build-up of product in depressions or low-lying areas using a clean roller or builder's sponge. Excess product pooling in depressions may cause a white/milky residue as solvents are released during cure.

Efflorescence can appear as white powdery patches before application, or creamish patches after. Steps to reduce the risk:

1. Apply after a dry spell of at least 48 hours and verify the entire paved area is dry by checking the sand joints.
2. Allow 8 weeks after paving installation before applying. Allow at least 2 weeks after washing/pressure cleaning of old installations.
3. If lime bloom appears before sealing, clean with Resiblock E.R. (efflorescence remover).
4. If in doubt, contact the Resiblock technical department before proceeding.

Resiblock Indian Sandstone Sealer Colour Enhancer cures rapidly on exposure to atmospheric moisture. Clean all equipment immediately using RESICLEAN only. Do not use other solvents as unknown synergistic reactions may occur. Wash with water and detergent afterwards.

Typical values. Infiltration data — University of Newcastle / British Aerospace Military Aircraft Ltd.