Cromar® offers a complete portfolio of professional roofing and waterproofing products designed to deliver reliability, longevity, and ease of application.
From advanced liquid-applied membranes to traditional felts, breathable roof underlays, pitched roof accessories and GRP systems, Cromar® provides high performance solutions trusted by contractors, builders, and merchants across the UK.
Whether working on flat or pitched roofs, Cromar® products are engineered to perform in demanding environments - delivering durability, weather resistance, and industry proven results.
Cromar® flat roof solutions cover everything from emergency repairs to full system installations, including liquid waterproofing membranes, GRP systems, bituminous coatings, primers, adhesives, felts, and specialist accessories. Each product is developed to deliver dependable performance in challenging weather conditions and across varied substrates.
Hydrosil® Liquid Roof System
Hydrosil® is Cromar’s professional-grade silicone roofing solution, engineered to restore, protect, and extend the life of roof surfaces withlong-lasting waterproofing performance.
The range includes a moisture‑curing Silicone Roof Coating, a high‑strength Seam Sealer & Detailer, and a heavy‑duty Reinforcement Roll - all designed to work together as a complete, high‑performance system.
Hydrosil® delivers a seamless, durable, UV‑resistant and weatherproof finish that protects against long‑term degradation and water ingress - making it the smart choice for roof refurbishment, leak‑prevention, and preventative maintenance.
Acrypol+
Acrypol+ is Cromar’s high‑performance, fast‑curing waterproofing solution for roofs. Formulated with advanced acrylic technology, it adheres strongly to both porous and non‑porous surfaces, making it ideal for repairs, maintenance and refurbishment acrossflat roof types.
Designed as a ready‑to‑use, brush‑on coating, Acrypol+ creates a seamless, flexible, waterproof membrane that can be applied in wet or dry conditions, saving time on site and reducing downtime.
Paired with Acrypol+ Scrim, a flexible polyester mesh for extra reinforcement, the system effectively bridges cracks, splits and voids in roofs and gutters - delivering long‑lasting waterproofing performance.
Metal‑Kote
Metal‑Kote is a specialised protective roof coating designed for metal sheeted roofs, industrial units, and
agricultural buildings. Formulated to combat corrosion and long-term exposure to the elements, Metal‑Kote forms a durable, weatherproof film that prolongsthe life of metal cladding and reduces maintenance requirements.
It's strong adhesion ensures reliable performance even on aged or weathered metal surfaces, offering an effective solution for restoring appearance while delivering dependable waterproofing and protection.
RubberCoat®
RubberCoat® is a highly flexible liquid rubber waterproofing system engineered to provide a seamless, durable membrane. Its exceptional elasticity allows it to accommodate movement and thermal expansion, making itsuitable for a wide range of roof types, gutters, and complex detailing.
RubberCoat® cures to form a smooth, fully waterproof finish that resists cracking, UV exposure, and environmental stresses. Its ease of application and versatile use cases make it a go‑to product for both complete roof refurbishments and targeted problem‑area repairs.
PROGRP® Glass Fibre Roofing System
PROGRP® is a professional-grade glassfibre roofing system designed to deliver outstanding durability, structural strength, and long-term weatherproofing. Ideal for new constructions, refurbishments, and complex roofshapes,
PROGRP® provides a robust, seamless finish that is resistant to impact, fire, and environmental exposure. Its Broof(T4)* certified system offers industry-leading fire performance, while the range includes everything from reinforcements and catalysts to specialist tools.
The system’s consistency and longevity make it a preferred choice for installers seeking high-performance, low-maintenance roofing solutions.
*BRoof(T4) on OSB.
Contractor G25 System
The Contractor G25 system offers a cost-effective GRP roofing solution without compromising on performance. Designed specifically for contractors requiring fast, efficient installation, G25 delivers strongadhesion, excellent waterproofing, and a clean, professional finish.
Ideal for new builds, the G25 range includes resins and topcoats tailored for ease of use, supporting installers with a reliable system suitable for a wide variety of flat roofing applications.
Flexiglass® Flexible Glass Fibre Roofing System
Cromar® Acrypol Flexiglass is a high‑performance GRP (Glass‑Reinforced Polyester) roofing system designed to deliver long‑lasting, seamless waterproofing for modern flat roofing applications. Engineered using advanced polyester resin technology and reinforced fibreglass matting, the system offers outstanding flexibility, fastcure times, and a fully bonded, durable finish.
Suitable for both refurbishment projects and new roof construction, Acrypol Flexiglass adheres to a wide range of substrates - including felt, asphalt, concrete, cement-bonded particle board and OSB3 TG board, making it a versatile and reliable solution.
Its strength, speed of installation, and proven durability make it an ideal choice for contractors seeking consistent, long‑term performance.
Its Broof(T4)* certified system offers industry-leading fire performance, while the range includes everything from reinforcements and catalysts to specialist tools. - may need editing. BRoof(t4) on cement bonded particle board.
Bitumen Range
Cromar®’s bitumen collection encompasses a complete range of paints, primers, adhesives, and waterproofing compounds developed fortraditional flat roofing, repairs, and maintenance work.
These products are engineered to provide dependable waterproofing, strong adhesion, and excellent compatibility with felt, concrete, metal, and masonry surfaces.
Whether used for sealing, priming, bonding felts, or providing protective surface coatings, Cromar® bitumen products deliver time-tested reliability for both professional roofing projects and general construction maintenance.
Flat Roof Trims
Cromar®’s extensive trim portfolio is designed to deliver the precise detailing required for flat roof edges, upstands, junctions, outlets, and perimeter terminations. Manufactured for durability and compatibility with the PROGRP and Flexiglass® systems, these trims ensure secure water management, structural definition, and a professional aesthetic finish.
The range includes raised edge trims, drip trims, simulated lead flashings, expansion joints, parapet outlets, internal and external corners, fillet trims, ridge closures, and specialised detailing components for complex roof geometries.
By simplifying junction work and ensuring watertight detail areas, Cromar® trims help installers deliver robust, reliable roofing systems while maintaining strong edge definition and refined presentation across all flat roof types.
Flat Roof Accessories & Tools
Cromar® offers a comprehensive range of specialist accessories and tools designed to support the installation, detailing, and maintenance of flat roofing systems. These components ensure contractors can achieve a high‑quality, professional finish across liquid, PROGRP,Flexiglass, and bituminous systems.
From precision application tools such as paint brushes, laminating rollers, and resin applicators, to practical mixing buckets, dispensing bottles, and tubs - each item is engineered for ease of use, durability, and reliability on site.
Whether a contractor is completing a small repair or installing a full roofing system, Cromar’s accessory and tool range provides everything needed to streamline application, reduce waste, and support installation standards.
Cromar’s felts and membrane range brings together decades of roofing expertise to offer a dependable portfolio of membranes designed for classic flat and pitched roof construction. Built to withstand harsh UK weather conditions, these felts provide robust waterproofing, strong tear resistance, and reliable performance across a wide variety of roofing applications - from sheds and garages to commercial and domestic roofing systems.
The range includes both bitumen-based felts for traditional installation methods and non-breather membranes designed for applications requiring
nonpermeable membrane performance. Manufactured for consistency, durability, and ease of handling, Cromar® felts and membranes deliver long lasting protection and support compliant installation across new build and refurbishment projects.
Bitumen Felts
Cromar® Bitumen Felts provide a proven, time-tested solution for waterproofing and roof covering. These felts are engineered using high quality bituminous compounds to ensure excellent bonding, strength, and resistance toweather exposure.
Suitable for both torch-on and pour-and-roll applications, the range includes underlays, capsheets, shed felts, SBS and APP modified felts, and specialist membranes for various roof types.
Their flexibility and durability allow installers to achieve a robust layered waterproofing system that resists cracking, blistering, and water penetration. Whether used for full roofing systems or individual repairs, Cromar® bitumen felts remain a trusted choice for reliable, cost effective roofing performance.
Non‑Breather Felts
Cromar® Non-Breather Felts are designed as impermeable membranes that prevent water penetration while providing a tough secondary barrier in pitched roofing systems. Unlike breathable membranes, these felts do not allow moisture vapour to pass through, making them suitable for traditional cold roof constructions or applications where ventilation is provided separately.
Engineered for strength, stability, and ease of installation, Cromar’s non-breather felts help protect roof structures from wind driven rain, dust, and debris, ensuring a reliable line of defence beneath slate or tile coverings. Their consistent weight, durability, and dependable waterproof performance make them an essential component for traditional roofing methods.
Cromar® pitched roof solutions are engineered for modern roofing standards, covering breathable membranes, roof coverings, dry fix systems, lead replacements, and a comprehensive range of pitched roof accessories. Designed to support ventilation, weatherproofing, and long-termroof durability.
CromaSlate® Roof Covering System
CromaSlate® offers a modern, lightweight alternative to natural slate, combining the aesthetic appeal of traditional roofing with the installation benefits of advanced synthetic materials. Engineered for durability, CromaSlate® tiles are resistant to cracking, fading, and weathering, making them ideal for a wide range of pitched roof applications.
The system includes complementary verge, ridge, and hip components to deliver a complete, cohesive finish.
Designed with contractors in mind, CromaSlate® ensures easier installation, consistent quality, and long-term visual performance.
Leadax® - Lead Replacement Solutions
Leadax® is the first lead alternative in the world with the same properties as traditional lead. Since its launch in 2018 Leadax® has grown to be one of the most popular lead alternatives on the market. With numerousbenefits over Lead, and other lead replacements, it is the obvious choice.
Leadax® Original is the first lead substitute in the world that looks like lead, dresses like lead & is as malleable & pliable as lead. Leadax® has the same unique properties as Lead, without having to compromise on quality, flexibility or price. Leadax® is applied in exactly the same way as Lead & is equivalent to code 5.
Pitched Roof Accessories
Cromar® supplies a full suite of pitched roof accessories designed to support ventilation, secure roof coverings, and ensure long-term weather resistance. From dry ridge and verge systems to flashing tapes, valley troughs, vents, comb fillers, and underlay support trays, the range coversevery detail required for a fully compliant pitched roofing system.
Each component is manufactured for durability, ease of installation, and compatibility with modern roofing methods, helping contractors deliver consistent, high-quality results on all roof types.