Delcote® Architectural Roof Coating for Asbestos and Fibre Cement Roofs (25 year)
Verified by manufacturer 1 month ago
Architectural roof coating for asbestos and fibre cement roofs.
Application
- Primer-less adhesion to most common substrates.
- Suitable for use on an asbestos and fibre cement roof.
Description
A full roof coatings system, engineered for the roofing environment using inorganic (mineral based) Alkoxy technology to prevent chalking and deterioration, with resistance to weathering from ultraviolet (UV) light, rain, snow and temperature extremes to retain high movement accommodation, flexibility and adhesion without cracking or peeling.
Installed by manufacturer network of approved contractors, all project works are inspected and certified to exacting quality standards – consult manufacturer for details.
Features and benefits:
- Delcote is a 100% silicone based remedial treatment and is suitable for use in areas of industrial pollution and/ or coastal and marine environments.
- Primer-less adhesion to most common substrates.
- Fast cure rate, 15–30-minute skin over time followed by 1–2 hour tack free time.
- High static viscosity ensures material stays where it is sprayed. It will not flow off high spots or vertical areas, and therefore allows for easy build-up of required dry film thickness.
- Long service life with high resistance to UV attack.
- Provides breathable membrane for protection of asbestos and concrete surfaces.
- Does not degrade by chalking.
- Any subsequent soiling of the product can be easily removed by a simple detergent wash.
- No additional structural weight is applied.
- No risk of further penetrations.
- Delcote needs no vapour control. It is a fully breathable membrane which can further seal the roof from air leakage, helping to retain heat.
- No disruption for building users.
System components and installation application:
- Seamsil sealant: Gun-applied around the base of the fixing, forming a complete bridged seal. To be tooled off to a neat edge.
- Seamsil base coat: Whilst the Seamsil sealant is still wet, apply Seamsil base coat by brush to encapsulate and visually obscure the complete fixing detail, taking the coating onto the roof sheet by approximately 25 mm. Allow to cure.
- Delglaze - Where applicable, please refer to Delglaze for coating rooflights. When using Delglaze in conjunction with Delcote, ensure that the Delglaze is applied first, and that rooflights are then masked off in a safe manner to prevent overspray.
- Delcote base and top coats. Utilising spray, roller or brush, apply a first coat of Delcote to prepared, clean and dry, structurally sound surfaces at a wet film thickness of 200 microns and allow to fully cure. Once the base coat is tack free (overnight cure is recommended), apply a second coat in a contrasting shade at a wet film thickness of 154 microns, and allow to fully cure.
Technical characteristics:
- Dry film thickness (complete system): roof sheets – minimum 210 microns.
Seamsil sealant:
- Chemical base: Alkoxy silicone, room temperature vulcanizing.
- Colour: Grey.
- Specific gravity: 1.39.
- Shore A Hardness: 20 (approximately).
- Time to full cure: 10–14 days.
- Movement accommodation: ±50%.
- Elongation at break: 700%.
- Tensile strength: 1.6 N/mm².
- Application temperature: 3–60°C.
- Dew point: Surface to be 2°C above the dew point.
Seamsil base coat:
- Chemical base: Silicone coating in a spirit carrier.
- Specific gravity: 1.22.
- Shore A Hardness: 20 (approximately).
- Dry film thickness: Complete system – 350 microns (minimum).
- Time to full cure: 10–14 days.
- Solids content: By volume – 80%.
- Movement accommodation: ±50%.
- Elongation at break: 750%.
- Tensile strength: 1.6 N/mm².
- Application temperature: 3–60°C.
- Dew point: Surface to be 2°C above the dew point.
Delglaze (where applicable):
- Product type: Single component blend of polyurethane resins.
- Curing system: Aliphatic polyurethane.
- Appearance: Transparent semi-gloss.
- Drying time at 20°C: Touch dry in 4 hours. Hard dry in 12 hours.
- Overcoat time at 20°C: 6 hours (minimum).
- Solids: By weight 80%, by volume 60%.
- Theoretical coverage: 4 m² per kilogram per coat.
- Tensile strength: 1.6 N/mm².
- Application temperature: 3–60°C.
- Dew point: Surface to be 2°C above the dew point.
Delcote:
- Chemical base: Silicone coating in a spirit carrier.
- Specific gravity: 1.25.
- Shore A Hardness: 32 (approximately).
- Tack free: Two hours (approximately).
- Time to full cure: 7–10 days.
- Solids content: By weight – 80%, by volume – 60%.
- Elongation at break: 400%.
- Tensile strength: 1.38 N/mm².
- Application temperature: 3–60°C.
- Dew point: Surface to be 2°C above the dew point.
- Wind speed to be below 24 km/h (when spraying).
General information
Color | Brown Grey Green |
Finish | Coated |
Material | Silicone Guidance for specification option: Inorganic (mineral based) Alkoxy. |
Shape | Formless Guidance for specification option: Liquid applied coating. |
Length | Bespoke |
Width | Bespoke |
Height | Bespoke |
Warranty description | 25 year Guidance for specification option:
|
Uniclass | |
CAWS | H30/10 Fibre cement H30/110 Fibre cement H30/120 Fibre cement |
Specification data - Special coating systems
Preparation | Guidance for specification option: Preparation All preparation activities shall comply fully with the relevant Health & Safety at Work Act, especially with regard to the removal and disposal of asbestos based waste products. The surfaces to be treated should be thoroughly cleaned to remove all old treatments, dirt, grease, dust and surface contaminants. Cleaning of the asbestos surface is to be strictly in accordance with all current regulations. Loose coatings should be removed from the entire surface. Make sure not to miss areas around fixings, bolt penetrations and side laps. An adhesion test should be carried out to any remaining well adhered coatings. Note: Do not at any time clean the surface with soap detergent. This action would leave a residual film and may adversely affect adhesion. Preparation of bolts/fixings Check the integrity of the existing fixings. Suspect fixings should be replaced in accordance with recommended standards. Any plastic caps that are not integral should be removed. Loose fixings should be tightened. Remove any degraded washers or fixing caps. Crop excess thread back to the nut. Remove any sharp edges. Thoroughly clean the existing fixings to remove all loose and flaking rust using a wire brush. Any previously applied coatings or repairs, especially bitumen based compounds should be completely removed. The roof fixing and surrounding substrate must be thoroughly clean and dry before the application of Sharmans products. A mechanically driven leaf blower may be used to achieve this. Thoroughly clean the surface using Isopropyl Alcohol. The surface to be treated must be thoroughly clean and dry before material application. A hot air blower may be used to achieve this. |
Initial coats | Anti-corrosion coatings.Guidance for specification option: To Overlaps, Ridge / Flashing Joints & Tops Of Rooflights Seamsil® Sealant is gun-applied into the gap between the upper and lower roof sheets, as close to the edge of the upper sheet as possible, forming a complete bridged seal. The Seamsil® system may also be used on the vertical lap joints if the roof suffers from water ingress due to incorrect lap formation. Seamsil® Base Coat Seamsil® base coat should be applied at least 25mm above the edge of the roof sheet or either side of the overlap, and where applicable a further 10mm beyond the prepared exposed metal to ensure complete coverage. For neat aesthetics, the coating should be applied in a straight line. To aid this, a pencil line or a straight edge can be used. At Overlaps Whilst the Seamsil® Sealant is still wet, apply Seamsil® Base Coat by brush at a minimum wet film thickness of 220 microns. Work in a smooth upward motion over the sealant, ensuring complete coverage of all exposed and prepared metal. Allow to cure to a tack free state. The finished Seamsil® treatment must form a fillet across the joint that visually obscures the leading edge of the top sheet. At All Other edges Apply Seamsil® Base Coat by brush at a minimum wet film thickness of 220 microns, ensuring complete coverage of all exposed and prepared metal, and encapsulating the sheet edge. Allow to cure to a tack free state. At Fixings Brush apply one liberal coat of Seamsil® Base Coat over and around the roof fixings, ensuring a full encapsulation is achieved, especially at the base. Allow to cure to a tack free state. Delglaze® (where applicable) For rooflights being coated using Delglaze®, please refer to the Delglaze® System Specification and the relevant Product Data Sheets. When using Delglaze® in conjunction with Delcote®, ensure that the Delglaze® treatment is carried out first, and that the rooflights are then suitably covered in a safe manner to prevent overspray. |
Undercoats | Slate Grey.Manufacturer guidanceA contrasting base and top coat should be selected. Consult manufacturer for details. |
Finishing coats | Manufacturer guidanceA contrasting base and top coat should be selected. A wide range of colours are available, consult manufacturer for details. |
Additional coatings to surfaces that will be concealed when component is fixed in place | Manufacturers system recommendations.Guidance for specification option: To Overlaps, Ridge / Flashing Joints & Tops Of Rooflights Seamsil® Sealant is gun-applied into the gap between the upper and lower roof sheets, as close to the edge of the upper sheet as possible, forming a complete bridged seal. The Seamsil® system may also be used on the vertical lap joints if the roof suffers from water ingress due to incorrect lap formation. Seamsil® Base Coat Seamsil® base coat should be applied at least 25mm above the edge of the roof sheet or either side of the overlap, and where applicable a further 10mm beyond the prepared exposed metal to ensure complete coverage. For neat aesthetics, the coating should be applied in a straight line. To aid this, a pencil line or a straight edge can be used. At Overlaps Whilst the Seamsil® Sealant is still wet, apply Seamsil® Base Coat by brush at a minimum wet film thickness of 220 microns. Work in a smooth upward motion over the sealant, ensuring complete coverage of all exposed and prepared metal. Allow to cure to a tack free state. The finished Seamsil® treatment must form a fillet across the joint that visually obscures the leading edge of the top sheet. At All Other edges Apply Seamsil® Base Coat by brush at a minimum wet film thickness of 220 microns, ensuring complete coverage of all exposed and prepared metal, and encapsulating the sheet edge. Allow to cure to a tack free state. At Fixings Brush apply one liberal coat of Seamsil® Base Coat over and around the roof fixings, ensuring a full encapsulation is achieved, especially at the base. Allow to cure to a tack free state. |
Sustainability data
Contains Red List materials | No |
Country of material origin | United Kingdom |
Country of product manufacture | United Kingdom |
Literature
Delcote architectural coating specification (asbestos / fibre cement roof) 25 year
Delcote architectural coating product data sheet
Delcote architectural coating spray application guidelines
Delcote architectural roof coating guarantee options
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