Professional Roofing & Waterproofing Products

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  Flash Harry Thermoflex 4mm Torch-On Waterproofing Membrane (1m x 10m)

  R1 649,00 Original price was: R1 649,00.R1 200,00Current price is: R1 200,00.

  The Flash Harry Thermoflex 4mm Waterproofing Membrane (1m x 10m) is a preformed, APP-modified bitumen membrane designed for professional torch-on waterproofing systems. It creates a strong, impermeable barrier that protects buildings and concrete structures against water penetration and long-term moisture damage.

  Thermoflex is suitable for concrete roof decks, balconies beneath screeds or tiles, retaining walls, basements, water-retaining structures, planters and flower boxes. Its reinforced construction provides good dimensional stability, strength and resistance to normal movement within properly prepared substrates.

  The 4mm membrane is supplied in rolls measuring 1 metre wide by 10 metres long. The manufacturer’s technical information describes the 4mm grade as weighing approximately 4.8kg per square metre, which gives an estimated membrane weight of about 48kg before packaging. Retail listings may show a packaged weight of approximately 52kg.

  For the best installation, Thermoflex should be applied over the manufacturer’s compatible solvent-based primer. Flash Harry states that the primer should be allowed approximately three hours to dry before the membrane is installed. Where the membrane remains exposed to sunlight, the manufacturer recommends protecting it with a suitable bituminous aluminium coating rather than an ordinary acrylic roof paint.

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  Sika Index Waterproofing Membrane Black 4mm (1000mm x 10m)

  R1 500,00 Original price was: R1 500,00.R1 200,00Current price is: R1 200,00.

  The Sika Index Waterproofing Membrane Black 4mm (1000mm x 10m) is a premium torch-on waterproofing membrane engineered to deliver long-lasting protection against water penetration in demanding construction environments. Manufactured by Sika, one of the world’s leading construction chemical companies, this membrane combines excellent waterproof performance with superior mechanical strength and flexibility.

  Designed for professional waterproofing systems, the membrane is suitable for flat concrete roofs, roof slabs, balconies, terraces, retaining walls, foundations and underground structures. Its reinforced construction provides excellent puncture resistance, tear resistance and dimensional stability while maintaining flexibility to accommodate normal building movement.

  The 4mm membrane forms a seamless waterproof barrier when professionally installed using the torch-on method. Its outstanding adhesion, watertight performance and durability make it suitable for both new construction projects and refurbishment of existing waterproofing systems.

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  a.b.e Torch-On Waterproofing Membrane Black 4mm (1000mm x 10m)

  R1 300,00 Original price was: R1 300,00.R800,00Current price is: R800,00.

  The a.b.e Torch-On Waterproofing Membrane Black 4mm (1000mm x 10m) is a premium bituminous waterproofing membrane designed to provide long-lasting protection against water penetration on flat roofs, concrete slabs, balconies, retaining walls, foundations and other exposed surfaces.

  Manufactured using high-quality modified bitumen and reinforced for superior strength, this membrane delivers outstanding durability, flexibility and weather resistance. When professionally installed using the torch-on application method, it forms a seamless waterproof barrier capable of withstanding South Africa’s harsh climate, including heavy rainfall, UV exposure and fluctuating temperatures.

  Its excellent elongation properties allow the membrane to accommodate normal structural movement while maintaining a watertight seal. The robust 4mm thickness offers enhanced puncture resistance, tear resistance and long-term performance, making it an ideal solution for both new construction and waterproofing repairs.

  At RAB Group, we recommend this membrane for residential, commercial and industrial waterproofing projects where reliability, longevity and professional results are essential.