RCM Ultra Fiber Flex Waterproofing System Exterior Liquid Crack Filler  (20 L)

**RCM Ultra Fiber Flex Low Sheen Waterproofing Coating** **Maximum Durability. Ultimate Versatility.** RCM Ultra Fiber Flex sets the industry standard for high-performance waterproofing—delivering robust protection wherever you need it. Engineered with advanced fiber-reinforced technology, this multi-purpose waterproofing coating forms an ultra-flexible, seamless barrier to stop leaks, bridge cracks, and encapsulate corroded surfaces. The pure acrylic co-polymer binder ensures lasting adhesion and strength, while the modern low sheen finish offers a clean, professional look for both new projects and restorations. Perfect for concrete, masonry, metal, roofs, and especially for Torch-On membrane rehabilitation. **Key Benefits:** - **Fiber-Reinforced Strength:** Superior flexibility and crack-bridging for long-term protection - **Multi-Surface Versatility:** Use on concrete, masonry, metal, roofs, balconies, parapets, joints, and more - **UV & Chemical Resistant:** Proven to withstand harsh weather, 5+ years UVA/UVB exposure, acid and alkaline spills - **Eco-Friendly & Safe:** Low VOC, solvent-free, non-toxic—safe for water harvesting and sustainable builds - **Professional Finish:** Smooth, low sheen appearance retains its look for years - **Easy Application:** One-part formula applies effortlessly by brush, roller, or spray; compatible with geotextile membranes - **Zero Compromise on Safety:** Low odour, non-flammable, and safe for applicators **Ideal Applications:** - Flat and pitched roofs - Walls, parapets, balconies - Torch-On membrane refurbishment - Flashings, joints, and metal structures - Encapsulation of corroded surfaces - Any site requiring reinforced, long-lasting waterproofing **Technical Highlights:** - **Finish:** Low sheen, homogeneous emulsion - **Binder:** Pure acrylic co-polymeric - **Color Options:** Multiple tones—see catalogue - **Thickness:** 1000 microns wet film for optimal protection - **Binder Solids:** 65% for enhanced durability - **VOC:** Low VOC - **UV Resistance:** Passed 5+ years Xenon QUV testing - **Chemical Resistance:** Excellent against acid and alkaline spills - **Mixing:** Single component—stir well, do not dilute - **Cleanup:** Warm, soapy water - **Application Tools:** Compatible with RCM Paint Brush, roller, or spray **How to Use:** 1. Prepare surface (clean, dry, stable, remove debris/old coatings). 2. Stir product thoroughly. 3. Apply by brush, roller, or spray to recommended thickness. 4. For reinforced systems, use with or without geotextile membranes as required. 5. Allow each coat to dry before recoating. **Recommended Accessories:** - [RCM Paint Brush](https://www.securadeal.co.za/products/rcm-paint-brush) - [RCM Waterproofing Tape](https://www.securadeal.co.za/products/eco-rubber-waterproofing-tape) - [RCM Waterproofing Membrane](https://www.securadeal.co.za/products/eco-rubber-waterproofing-membrane) **Sustainability & Safety:** - Safe for potable water collection - Low odour; user-friendly - Non-toxic, non-flammable formulation - Store in a cool, ventilated area out of direct sunlight **What’s in the Box:** 1 x RCM Ultra Fiber Flex Waterproofing System **For full technical details:** [Download Technical Data Sheet](https://cdn.shopify.com/s/files/1/0420/3570/8056/files/UltraFiberFlexTDS.pdf?v=1750165839) **View Colour Options:** [Colour Chart](https://cdn.shopify.com/s/files/1/0420/3570/8056/files/RCM_UltraFiberFlex_Colours.png?v=1750848261)