Roofers No 1
High-performance roofing systems you can trust, built for durability, reliability, and ease of installation.)
Roofers No 1 is a specialist brand designed for roofing contractors and builders who demand reliable, high-quality products that perform in real-world conditions.
Developed by industry experts, the range delivers practical, installer-friendly solutions that make everyday roofing tasks simpler and more efficient — from small repairs and detailing to complete system applications.
Built with durability, ease of use, and all-weather reliability at its core, Roofers No 1 is trusted by tradespeople who need products they can rely on, day in and day out. Whether sealing complex roof details or repairing a persistent leak, Roofers No 1 is the name professionals reach for first.
Roofer’s No 1 Polyflex MS, Roof Membrane
Polyflex MS Roof Membrane is a next-generation liquid waterproofing system based on advanced MS Polymer technology, developed for professional roofing applications. Engineered using innovative Japanese technology, it creates a seamless, durable, and highly flexible waterproof barrier suitable for large horizontal and vertical surfaces.
This single-component, ready-to-use membrane is easily applied by roller or brush and self-levels to form a continuous, joint-free finish. Once cured, it provides excellent UV resistance and long-term weather durability, maintaining flexibility and strong adhesion even in extreme temperatures and exposed environments.
Its solvent-free and isocyanate-free formulation produces very low VOC emissions and is almost odourless, improving both on-site safety and application comfort. The membrane is capable of bridging cracks of up to 3 mm while accommodating normal structural movement, delivering reliable and long-lasting waterproof protection for roofs, balconies, and terraces.
Roofer’s No 1 Polyflex MS, Detail Membrane
Polyflex MS Detail Membrane is a high-performance, single-component waterproofing membrane based on advanced MS Polymer technology, developed for roofing details, repairs, and complex waterproofing areas. Using innovative Japanese technology, it provides outstanding flexibility, adhesion, and durability across a wide range of substrates and environmental conditions.
Designed for use on both horizontal and vertical surfaces, Polyflex MS Detail Membrane is ideal for sealing and waterproofing critical roof details such as upstands, penetrations, joints, cracks, and transitions. It forms a seamless, fully bonded waterproof layer that integrates easily with wider liquid waterproofing systems.
Its semi-fluid, medium-viscosity formulation allows for quick and easy application by brush or roller, ensuring excellent coverage and precise detailing. Once cured, it creates a durable membrane capable of bridging and repairing cracks of up to 5 mm, while accommodating normal structural movement.
Key benefits include excellent adhesion even on slightly damp substrates, strong UV resistance for external applications, and a solvent- and isocyanate-free formulation with very low VOC emissions and minimal odour. The membrane also remains highly elastic at low temperatures and can be over-painted if required, making it a versatile solution for long-lasting roof detailing and waterproofing repairs.
Roofers No.1 HP50 Sealant
Roofers No.1 HP50 is a premium, high-performance polymer sealant and adhesive engineered for professional roofing and construction applications where durability, flexibility, and reliability are essential.
Developed to perform in demanding environments, HP50 offers excellent adhesion to most common construction substrates without the need for priming, making installation quicker and more efficient. Its advanced polymer formulation provides long-term flexibility and outstanding resistance to weathering and UV exposure, ensuring reliable performance in exposed conditions.
Designed to skin and cure rapidly, HP50 allows for efficient application while maintaining a strong, durable bond. Once cured, it forms a tough yet elastic seal with excellent cut and tear resistance, remaining permanently flexible to accommodate joint movement and structural expansion.
The non-sag formulation makes HP50 suitable for both vertical and horizontal applications, and it is easy to apply using standard sealant guns. Its low-VOC, odourless composition improves on-site comfort while maintaining professional-grade performance.
HP50 is also fully waterproof, providing a reliable watertight seal that protects against water ingress. It offers excellent resistance to UV exposure, weathering, seawater, diluted acids, and alkalis, making it suitable for a wide range of roofing and construction sealing applications. Once cured, the sealant forms a paintable, non-sticky finish, ensuring a clean and professional result.
Roofers No.1 Roof & Gutter Sealant
Roofer’s No.1 Roof & Gutter Sealant is a premium, high-performance polymer sealant engineered for professional roofing and construction applications where durability, flexibility, and long-term reliability are essential.
Developed to perform in exposed and demanding environments, Roof & Gutter Sealant delivers excellent adhesion to most common construction substrates without the need for priming, helping to streamline installation and improve efficiency on site. Its advanced polymer formulation ensures long-term flexibility and outstanding resistance to UV exposure and weathering, providing dependable performance in external conditions.
Designed to skin and cure rapidly, Roof & Gutter Sealant enables efficient application while maintaining a strong, durable bond. Once cured, it forms a tough yet elastic seal with excellent cut and tear resistance, remaining permanently flexible to accommodate joint movement and structural expansion without cracking or failure.
The non-sag formulation makes it ideal for both vertical and horizontal applications, allowing for easy and precise application using standard sealant guns. Its low-VOC, odourless composition enhances on-site comfort while maintaining professional-grade performance.
Roof & Gutter Sealant is fully waterproof, delivering a reliable watertight seal that protects against water ingress. It offers excellent resistance to UV exposure, weathering, seawater, diluted acids, and alkalis, making it suitable for a wide range of roofing and construction sealing tasks. Once cured, it provides a smooth, non-sticky, paintable finish for a clean and professional result.
Roofer’s No 1 PU Foam Adhesive Kit
PU Foam Adhesive Kit is a complete, ready-to-use solution designed for the efficient bonding of roof insulation panels in professional roofing applications. The kit combines a high-performance PU Foam Adhesive with a dedicated application gun and foam cleaner, providing everything required for fast, clean, and reliable installation on site.
The PU Foam Adhesive is a polyurethane-based aerosol adhesive developed for the durable and economical bonding of roof insulation materials. It delivers strong adhesive performance while also acting as an effective thermal insulator, helping to reduce heat loss and improve the overall efficiency of the roofing system.
Designed for versatility, the adhesive can be used on both even and uneven surfaces, filling cavities of up to 10 mm (1 cm) beneath insulation boards to ensure full contact and secure bonding. It is suitable for vertical applications and provides strong resistance to wind uplift, supporting the long-term stability of the insulation system.
The solvent-free formulation ensures compatibility with most common insulation boards and allows for precise, controlled application using the adjustable foam gun. Compared with traditional mechanical fixing methods, the system helps reduce material usage, speed up installation, and improve site efficiency.
With its fast-curing formulation, roofing membranes can be installed shortly after the insulation has been bonded, helping to reduce installation time by up to 30% and keeping roofing projects moving efficiently.
Roofer’s No 1 EPDM Shed Roof Kit
The Roofer’s No.1 Shed Kit is a complete, easy-to-install solution for creating a durable, watertight shed roof. Designed specifically for flat and low-pitch roofs, this all-in-one kit includes everything required to achieve a professional EPDM rubber roofing finish with minimal effort.
Ideal for both DIY users and professional installers, the kit provides a long-lasting, maintenance-free roofing system using a premium EPDM rubber membrane. Known for its flexibility and strength, EPDM offers excellent waterproofing performance and adapts easily to a range of shed and outbuilding applications.
The system is quick and simple to install, requiring only basic tools, making it a practical choice for homeowners and tradespeople alike. Once installed, the membrane delivers outstanding resistance to UV exposure, ozone, frost, and extreme temperature changes, ensuring reliable protection in all weather conditions.
In addition to its performance benefits, the EPDM membrane creates a clean, modern finish that enhances the overall appearance of any shed or garden building. With a life expectancy of over 70 years, it provides a cost-effective, long-term alternative to traditional felt roofing systems.
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