Liquid Flat Roof Coating Systems

Upgrade your flat roof with our high-performance liquid waterproofing systems. Designed for ease of application and long-lasting protection, these cold-applied coatings create seamless, flexible membranes that resist standing water, UV damage and cracking. Whether you're renovating a domestic extension, refurbishing a garage or sealing a new build, our range offers durable solutions trusted by professionals across the UK.

Liquid Roofing Solutions for Any Project

From Arboflex PU systems to specialist primers and trims, this collection includes everything you need for a complete installation. Liquid waterproofing is a popular choice for both trade and DIY customers due to its versatility, fast curing times and exceptional adhesion to most substrates. Suitable for felt, concrete, asphalt, timber, metal and more, our flat roof coatings provide a reliable, weatherproof finish.

Seamless Application and Long-Term Protection

Unlike traditional felt or sheet membranes, liquid coatings can be applied around complex details, rooflights and upstands without seams or joints. This significantly reduces the risk of leaks over time. Many systems also offer root resistance and chemical protection, making them suitable for green roofs and commercial applications. Look out for single-component PU coatings that require no mixing and simplify the installation process.

Compatible Products for Complete Systems

Alongside our waterproof coatings, we stock a full range of compatible flat roof trims, reinforcement fleeces, jointing tapes, primers and cleaners to ensure you get the right finish first time. If you're working with Arboflex, all accessories are available to match, including internal and external corners, termination bars and upstand trims.

Related Flat Roofing Categories

• EPDM Rubber Roofing
• Torch-On Felt Roofing
• GRP Roofing Systems
• Shed & Garden Roofing

Why Choose Trusted Building Supplies?

• Trade-trusted waterproofing solutions
• Fast UK delivery available
• Competitive pricing across all roofing systems
• Expert support available if you need help choosing the right product
• Only quality brands and proven products

Whether you’re tackling a full flat roof refurbishment or a small repair, our liquid waterproofing systems offer a reliable, cost-effective solution. Browse the full range below or get in touch if you need technical advice or help with quantities.