Seamsil 300 Gutter Joint System

A gutter joint repair system using Seamsil sealant and base coat.

Features and benefits:

• Weather and ultraviolet (UV) resistant.
• Proven corrosion resistance.
• Encapsulates the damaged area to restrict further deterioration.
• Water repellent seal.
• Primer-less adhesion.
• Remains tough and flexible, and is designed to withstand normal surface movement, ensuring continued optimum performance even in aggressive environments.
• Dry film thickness (complete system): Minimum 350 microns.
• Long life protection in elasticity and encapsulation.
• Silicone systems do not degrade by chalking and do not have self-cleaning properties.

System components and installation application:

• Sharman's Barrier Primer: Bitumen and other volatile materials must be removed. Any remaining residue must be primed with Sharman's Barrier Primer.
• Seamsil sealant (at overlaps): Seamsil® Sealant is gun-applied into the joint of the gutter and around the base of the bolts/fixings forming a complete bridged seal.
• Seamsil base and top coats: Whilst the Seamsil® Sealant is still wet, apply Seamsil® Base Coat by brush at a minimum wet film thickness of 220 microns. Allow to cure to a tack free state. Seamsil® Base Coat should be applied at least 25 mm either side of the gutter joint, ensuring complete coverage of the joint and bolts/fixings.

Seamsil base and top coats:

• Chemical base: Silicone coating in a spirit carrier.
• Specific gravity: 1.22.
• Shore A Hardness: 20 (approximately).
• Dry film thickness: Complete system – 350 microns (minimum).
• Time to full cure: 10–14 days.
• Solids content: By volume – 80%.
• Movement accommodation: ±50%.
• Elongation at break: 750%.
• Tensile strength: 1.6 N/mm².
• Application temperature: 3–60°C.
• Dew point: Surface to be 2°C above the dew point.

Seamsil sealant:

• Chemical base: Alkoxy silicone, room temperature vulcanizing.
• Colour: Grey.
• Specific gravity 1.39.
• Shore A Hardness: 20 (approximately).
• Time to full cure: 10–14 days.
• Movement accommodation: ±50%.
• Elongation at break: 700%.
• Tensile strength: 1.6 N/mm².
• Application temperature: 3–60°C.
• Dew point: Surface to be 2°C above the dew point.