GSA PRO SEAL 500 | GSA® All Purpose Seal Silicone 300ml | General Glazing Translucent Sealant Sealer

GSA Pro Seal 500 is an easy-to-use, one-part 100% oxime, neutral curing adhesive/sealant with anti-fungal properties. Key performance properties include non-slump, excellent adhesion, mildew resistance, and outstanding weatherability.

Packaging: Cartridges 300gm each, Carton - 20 cartridges

Colour: Clear and other for request

Applications:

This silicone is ideal for general glazing and sealing applications where long-term reliability is essential. It boasts superior weathering and UV resistance, remains unaffected by extreme temperatures, and retains its physical properties after years of exposure. It resists mildew in hot and humid environments, making it suitable for sealing kitchens, vanities, bathrooms, shower screens, and other wet areas.

It adheres to glass, ceramics, aluminium, masonry, stone, concrete, most metals, and many plastics, making it perfect for a range of weatherproofing applications.

Limitations
GSA Pro Seal 500 is not recommended for use on sub-merged joints where porous substrates permit water to the bond interface. Not for certain rubber products where bleeding of plasticiser may occur, or horizontal walkways where sealant will be subject to abrasion. Cannot be painted, as the paint will not adhere to the sealant. Not recommended for use on polycarbonate plastic. Suitability for use on other types of plastic including extruded gutter profiles should be tested prior to application.

Application Guide

A thin bead of sealant will tolerate more movement than a thick bead. Joint width and depth should be no less than 4 mm. Maximum joint widths should not exceed 25mm. Joint depths should be half the width, with a maximum depth of 10mm. Polyethylene closed cell foam rod is the recommended backing material to provide the correct depth of the joint. If the joint is too shallow, use a polyethylene tape bond breaker. Do not allow the silicone sealant to contact the back of the joint or any staining materials.

Cut the nozzle at 45 Degree angle to desired bead width, and apply to the substrate with a sealant gun and tool within 5-10 minutes. Uncured sealant can be cleaned up with mineral turpentine. Some surfaces may need a primer. If so, allow the primer to dry before applying sealant. Use approved backing material for joints over 10mm deep. For a neat appearance to the joint, use masking tape. Always remove the masking tape before the sealant has skinned over.

Surface Preparation
Surfaces must be clean, dry and free of dirt, grease, oil, rust and water. Use white spirits or mechanical cleaning with a l int free cloth. Do not use soap or detergent. For plastics, contact CW Brands for a recommended cleaning solvent. When used on remedial work all existing sealant must be removed prior to application of new material.

Storage and shelf life
The shelf life of GSA Pro Seal 500 is 12 months if stored in a cool dry place. The storage temperature should not exceed 25°C as this will decrease shelf life.

Health and Safety
This product emits Methyl Ethyl Ketoxime (MEKO) whilst curing which is hazardous. Use in a well-ventilated area and avoid breathing in vapour. Avoid contact with skin, eyes and mouth. If in the eyes, immediately flush with water for 15 minutes. If irritation persists seek medical attention. Remove contact lenses before using a sealant. Do not handle lenses until all sealant has been removed from fingertips and nails. The residual sealant may remain on fingers for several days and transfer to lenses and cause eye irritation. Avoid contact with skin and clothing. First Aid. Please refer to the Safety Data sheet