GacoFlex Roof Waterproofing Liquid Tape

Why Choose GacoFlex Roof Waterproofing Liquid Tape?

Designed to work in conjunction with Gaco Silicone products, this advanced liquid tape eliminates the need for traditional rubber or mesh seam tapes, simplifying application while delivering exceptional performance. The product is LiquidRoofTape™ GRF1625 — a high-build 100% silicone liquid seam tape reinforced with microfibres.

Key Benefits of GacoFlex Liquid Tape:

• Versatile Seam Sealing: Effectively seals cracks, voids, and depressions, ensuring a watertight finish.
• Reinforcement: Strengthens joints, seams, penetrations, and transitions, ensuring durability and reliability.
• Encapsulation: Completely encapsulates fasteners, protrusions, and other vulnerable areas to protect against leaks.
• Wear Resistance: Exhibits durability under light foot traffic, ideal for maintenance and minor usage.
• Distinguishable Colour: Supplied in Light Gray, a colour deliberately chosen so it stays visible under a silicone topcoat and the applicator can see what has been detailed.

Compatible Roof Types

GacoFlex Liquid Tape is ideal for repairs and seam sealing on:

• Flat Roofs: Asphalt felt, EPDM rubber, and GRP fibreglass.
• Pitched Roofs: Metal, cement-fibre, and asbestos roofing systems.
• Transitions and Penetrations: Perfect for sealing around roof edges, vents, pipes, and other penetrations.

Coverage — quoted in linear metres of seam, not square metres of roof

• Seam sealing: 11.7 linear metres per 3.8 litre tin — that is 3.06 linear metres per litre — applied as a 102 mm (4 in) wide path at approximately 3.2 mm (1/8 in) thick. Change the path width or the applied thickness and the figure changes with it, so always quote the geometry alongside the number.
• Fasteners: approximately 350 fasteners per 3.8 litre tin, based on 51 mm (2 in) patches at 3.2 mm thick.
• Area (m²) rate: Gaco publishes none for LiquidRoofTape, and we do not offer one. At the manufacturer’s own 3.2 mm applied thickness the material rate would be roughly 3.2 litres per m². If you are estimating a large fill area rather than a seam, call us on 01208 832 602 before ordering.

Source: PDS — LiquidRoofTape™ GRF1625 Liquid Roof Seam Tape, 04/2024 (unchanged from the January 2016 issue).

How to Apply

1. Prepare the Surface: Ensure the area is clean, dry, and free of dust, debris, or loose material.
2. Apply GacoFlex Liquid Tape: Use a brush, spatula, or trowel to apply the product directly to the seam, joint, or crack. Do not thin the product.
3. Overlap: Make sure the liquid tape overlaps all applied areas by at least 51 mm (2 in) in all directions, at approximately 3.2 mm (1/8 in) thick.
4. Smooth and Reinforce: Work the liquid into the surface to ensure complete coverage and encapsulation.
5. Combine with Silicone Topcoats: Apply a compatible Gaco Silicone topcoat for additional protection and a uniform finish after curing.

Important limitations from the manufacturer

• LiquidRoofTape is suitable as a standalone patch only when used in conjunction with GacoRoof Silicone Roof Coating.
• Only silicone coatings should be applied over LiquidRoofTape. Do not overcoat it with a polyurethane sealant or coating.
• A primer is not normally required. Do not thin the product.

Technical data

• Colour: Light Gray (GRF1625)
• Solids: 80% ±1% by weight; 68% ±1% by volume
• VOC: ≤250 g/L
• Flash point: 39 °C (103 °F)
• Tensile strength: 230 psi (1.59 MPa) · Elongation: 87% (ASTM D412)
• Tear resistance: 30 pli (ASTM D624 Die C)
• Hardness: 55 Shore A (ASTM D2240)
• Storage: 2 years below 24 °C (75 °F)

Reliable, Long-Lasting Protection

Whether you’re sealing seams on asphalt, felt flat roofs, repairing cracks on EPDM rubber, or reinforcing transitions on metal pitched roofs, GacoFlex Liquid Tape offers versatility and performance within a Gaco silicone roof system. Its formula resists water, UV and weathering.

Start Sealing with GacoFlex Liquid Tape!

Simplify your roofing repairs and seam sealing projects with GacoFlex Liquid Roof Tape. Call 01208 832 602 for expert advice, product availability, and guidance on achieving long-lasting, professional results.