Roof Coat
Sissons Roofcoat is recommended for the protection and decoration of all unglazed, cementitous roof tiles, such as asbestos, cement cladding or other cement-composite roofing, where conditions demand better performance than that offered by conventional emulsion paints. This weather resistant paint dries to an exceedingly tough, lightfast ad durable film, yet remains sufficiently flexible to withstand the effects of climatic and temperature variations It is also highly resistant to alkali attack and algae or fungal growth.
Surface
Surface preparation should be properly carried out before application. All loose, flaking, chalking or friable materials should be removed. Make good any defects and ensure that the substrate is clean and free from contaminants, such as oil, grease, grime and fungal growth.
For new surfaces, ensure that the substrate is sufficiently dry (below 16% moisture) prior to paint application.
For redecoration, ensure that the previous coating is in good condition, otherwise remove via water-jet and/or scraping then treat as per new surface.
Unglazed tiles /Cement cladding /Cement composite (New / Redecoration)
| Primer | 1 coat of Sissons Ecolux Ecoprime or Sissons Alkali Resisting D’Primer |
| Finish | 2 coats of Sissons Roofcoat |
Problematic Surface
| Primer | 1- 2 coats of Sissons Powerkote Primer Solvent-Based |
| Finish | 2 coats of Sissons Roofcoat |
If the substrate colour is uneven, or in the case of re-decoration there is a radical change in colour, an additional coat of finishing may be required
Coverage
| Theoretical Coverage | Up to 14.2 square meters per litre per coat |
|
Expected Practical Coverage Based on 25% Loss Factor |
Up to 10.7 square meters per litre per coat |
Actual spreading rate will vary due to factors such as method and condition of application e.g. surface profile or roughness.
Application Techniques
Brush, Roller, Conventional and Airless Spray
Thinning
| Brush / Roller | Ready for use as supplied. However, a dilution of 5 -10% water by volume is allowed when necessary to assist application of the first coat. |
| Conventional Spray | Dilute with up to 25% of water by volume depending on the surface and desired finish. |
| Airless Spray | Ready for use as supplied. |
Drying Time
| Touch Dry | ½ hour |
| Hard Dry | 1½ hours |
| Recoating Time | After 2 hours |
Cleaning Up
Clean all equipment with clean water immediately after use.
