Langley PR-25 Roofing System
Verified by manufacturer 18 days ago
A PMMA resin-based cold-applied liquid waterproofing system.
Application
- Suitable for use where a flame-free application is required and existing systems are to be overlaid.
- Can be used in conjunction with most common types of waterproofing, including asphalt and bituminous membranes.
Description
A two-component, resin-based, high-performance, polymethylmethacrylate (PMMA) cold applied liquid waterproofing system with a catalytic action ensuring a fast, controlled curing. Designed to be mixed on-site.
Features and benefits:
- Robust.
- Seamless and flexible.
- Includes reinforcement with polyester fleece.
- Permanently elastic.
- UV stable.
- Not temperature dependent.
- Quick to install, wet-on-wet application.
- The catalytic action ensures fast curing, even at low temperatures.
- Life expectancy in excess of 25 years.
- Availability of full range of supporting products.
Components:
- Spray-On-Primer (0.2–0.5 kg/m²).
- PMMA WP Base Coat (1.5 kg/m²).
- PMMA Fleece (0.11 kg/m²).
- PMMA WP Top Coat, RAL: 7043 Dark Grey (1.5 kg/m²).
- PMMA Sealer Coat, RAL: 7043 Dark Grey (0.5-0.6 kg/m²).
- Paratene Carrier Sheet (0.6 kg/m²).
- Parafoam Ultra Insulation (4.16 kg/m² to achieve thickness of 130mm).
- Paratene Air and Vapour control Layer (AVCL) (0.6 kg/m²).
General information
Color | Grey Guidance for specification option: Dark. Other Guidance for specification option: Available in any RAL colour. |
Material | Resin Polyester Guidance for specification option: Fleece. Other Guidance for specification option: Insulation: Polyisocyanurate (PIR) foam. |
Shape | Formless |
Warranty description | 25 year Guidance for specification option: Independently insured guarantee for materials, design, workmanship and consequential loss (only valid when installed by approved contractors). |
Uniclass | |
CAWS | J31/10 Warm deck roof coating J31/110 Cold deck roof coating J31/120 Warm deck roof coating J31/5 Cold deck roof coating |
Specification data - Liquid-applied cold roof covering systems
Preparation | |
Horizontal work | Spray-On-Primer. Guidance for specification option: 0.2–0.5 kg/m². |
Skirtings and vertical work | Spray-On-Primer. Guidance for specification option: 0.2–0.5 kg/m². |
Carrier membrane | |
Type | Paratene Air and Vapour control Layer (AVCL). Guidance for specification option: 0.60 kg/ m². |
Liquid-applied waterproofing | |
Type | PMMA WP Base Coat. Guidance for specification option: 1.5 kg/m². PMMA WP Top Coat Guidance for specification option: 1.5 kg/m². |
Reinforcement | PMMA Fleece. Guidance for specification option: 0.11 kg/m². |
Surface protection | PMMA Sealer Coat. Guidance for specification option: 0.5–0 -0.6 kg/m². |
Weight | 9.17–9.57 kg/m². Manufacturer guidanceTotal system weight based on 130 mm insulation thickness. |
Colour | Dark Grey. Other. Guidance for specification option: Available in any RAL colour. |
Fire performance | Broof (t4). Guidance for specification option: To BS EN 13501-5:2016. |
Curing time | 30 minutes. Guidance for specification option: For each coat. |
Insulation | Parafoam Ultra Insulation. Guidance for specification option: 4.16 kg/m² (to achieve thickness of 130 mm). |
Sustainability data
Material | Resin Polyester Guidance for specification option: Fleece. Other Guidance for specification option: Insulation: Polyisocyanurate (PIR) foam. |
Expected Life | 25 year |
Literature
PR-25 Roofing System Data Sheet
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