Metal roofs are widely used for factories, warehouses, workshops, carports, extensions and commercial buildings because they are lightweight, fast to install and suitable for large roof areas. However, after long-term exposure to rain, heat, UV and roof movement, leakage often appears around seams, screw holes, overlaps, cracks and rusted areas.
For building owners and roofing contractors, the key is not only to cover the leaking point, but to create a reinforced waterproofing layer that can protect high-risk roof details and withstand outdoor exposure. CKS SpiderWeb 906X + Fabric Seal 201 is designed as a practical metal roof leakage repair and seam protection solution. The system combines a fiber-reinforced exposed waterproof coating with a polyester reinforcement fabric to strengthen vulnerable areas before forming the protective coating layer.
Metal roof leakage is usually related to detail failure rather than a single large opening. Common leakage points include:
· Roof seams and overlaps where sheets connect or move under thermal expansion and contraction.
· Screw holes and fasteners where washers age, loosen or lose sealing performance over time.
· Small cracks, pinholes or rusted areas caused by weathering, corrosion or mechanical damage.
· Poorly sealed joints around penetrations, flashings, gutters and roof edges.
· Old repair patches that are no longer flexible or no longer bonded to the metal surface.
A durable repair should therefore focus on surface preparation, targeted reinforcement and continuous waterproof coating, especially at seams, screw holes and other movement-prone details.
The SpiderWeb 906X + Fabric Seal 201 system is designed for exposed metal roof waterproofing projects where the main leakage risks are cracks, screw holes and seams. SpiderWeb 906X provides the main waterproof coating layer, while Fabric Seal 201 works as the reinforcement layer at critical roof details.
SpiderWeb 906X：Main waterproofing coating for exposed metal roof areas.
Fiber-reinforced, single-component, water-based, weather-resistant and UV-resistant; helps improve tensile strength, crack resistance and flexibility.
Fabric Seal 201：Reinforcement layer for cracks, screw holes and roof seams.
Polyester reinforcement fabric with high and uniform strength; easily wetted by waterproof coatings; helps strengthen the coating layer and extend service life.
System Combination：SpiderWeb 906X embeds Fabric Seal 201 at high-risk leakage points, then forms a continuous protective coating layer.
Improves seam protection, reduces risk of re-leakage at moving joints, and provides an exposed waterproofing solution for metal roofs.
CKS SpiderWeb 906X is a fiber-reinforced, single-component, water-based eco-friendly waterproof coating. It is formulated with premium acrylic emulsion, anti-crack fibers and functional additives. The product is suitable for exterior exposed roof waterproofing areas, including metal roofs and concrete roofs.
Key features:
· Ready to use and easy to apply.
· Integral micro-fibre reinforcement helps enhance tensile strength, crack resistance and bonding performance.
· Suitable for exposed areas and light trafficable roof surfaces.
· Good weather resistance and UV resistance, helping extend the service life of waterproof materials.
· Good tensile strength, high elasticity and excellent low-temperature flexibility.
· Reflective insulation properties that support exposed roof applications.
CKS Fabric Seal 201 is made from high-quality polyester raw materials using fine spinning and spunbond filament processes. It is designed to be compatible with most waterproof coatings and to enhance the strength of the coating layer at critical details.
Key features:
· High and uniform strength in both warp and weft directions.
· Bonds tightly with coatings and helps form a smooth construction surface.
· Good flexibility, high strength, corrosion resistance and resistance to acids and alkalis.
· Easily wetted and penetrated by various waterproof coatings, making construction more convenient.
· Widely used as a reinforcement layer in coating-based waterproofing systems.
· Metal roof leakage repair for factories, warehouses, workshops, commercial buildings and residential extensions.
· Seam and overlap protection on exposed metal roofing sheets.
· Screw hole and fastener point reinforcement.
· Crack repair and local reinforcement before full-surface coating.
· Exposed roof waterproofing where weather resistance and UV resistance are required.
The following procedure is recommended for metal roof leakage repair and seam protection:
1. Substrate preparation: Clean the roof surface and sand off rust. Remove dust, loose particles, oil, old failed patches and unstable coating layers. The substrate should be clean, sound and suitable for coating application.
2. Detail reinforcement: Apply one coat of SpiderWeb 906X and embed Fabric Seal 201 at cracks, screw holes and seams while the coating is still wet. Ensure the fabric is fully wetted, flat and tightly bonded to the surface.
3. Protective coating layer: Apply one additional coat of SpiderWeb 906X over the reinforced areas to form a continuous waterproofing layer. Pay extra attention to edges, overlaps and fastener rows.
Seams and screw holes are high-risk leakage points because they are exposed to movement, vibration, wind uplift, thermal expansion and repeated rainwater impact. A coating-only repair may not provide enough strength at these details. By embedding Fabric Seal 201 into SpiderWeb 906X, the waterproofing layer gains additional reinforcement where the roof needs it most. This helps improve resistance to tearing, cracking and local stress around joints and fasteners.
· Targeted leakage repair for cracks, screw holes and seams.
· Fiber-reinforced waterproof coating plus polyester fabric reinforcement.
· Suitable for exposed metal roof areas.
· Water-based and single-component coating for easier application.
· Good flexibility and crack resistance for roof movement areas.
· Weather-resistant and UV-resistant protection for outdoor exposure.
· Practical system for contractors, repair teams and channel customers.
Q: Can SpiderWeb 906X be used on metal roofs?
A: Yes. SpiderWeb 906X is suitable for exposed roof waterproofing projects such as metal roofs and concrete roofs.
Q: Why is Fabric Seal 201 used together with SpiderWeb 906X?
A: Fabric Seal 201 works as a reinforcement layer. It strengthens the coating layer at cracks, screw holes and seams, helping improve the overall durability of the repair area.
Q: Can this system be used for screw hole leakage?
A: Yes. The system is designed for detail reinforcement at screw holes, cracks and seams. Apply SpiderWeb 906X and embed Fabric Seal 201 at the leaking screw hole area, then cover it with another coat of SpiderWeb 906X.
Q: Is the system suitable for exposed roof areas?
A: Yes. SpiderWeb 906X is designed for exposed areas and has good weather resistance and UV resistance.
Q: Is substrate preparation necessary before application?
A: Yes. The metal roof surface should be cleaned and rust should be sanded off before application. Loose rust, dust, oil and unstable old coatings may affect bonding performance.
Q: Can it be applied over severely rusted or damaged metal sheets?
A: For severe corrosion, structural damage or large openings, the damaged metal sheet should be repaired or replaced before waterproofing. The coating system should be applied on a sound substrate.
Need a metal roof leakage repair solution for seams, screw holes or cracks? Contact CKS to learn more about SpiderWeb 906X + Fabric Seal 201 and choose the right waterproofing system for your roof condition.
