General Purpose Silicone is a mid modulus silicone sealant that adheres to most smooth and non-por...General Purpose Silicone is a mid modulus silicone sealant that adheres to most smooth and non-porous materials. It contains an anti-fungal compound to prevent mould growth in areas of high humidity and forms a permanently flexible rubber seal. Perfect for sealing around baths, showers, basins, and other sanitary ware; as an adhesive for fixing PVCu trims, cladding, and panels; sealing around worktops and laminates; sealing to metal, timber, and PVCu window frames, and pointing around window and door frames; for aluminium gutter sealing; and general draught proofing. This sealant cures quickly, has low dirt pick up, and a low viscosity for fast application. It provides a high strength waterproof seal and is suitable for glass to glass and glass to aluminium sealing. It can accommodate movement of +/- 12.5%.
This guide is for DIY enthusiasts and trade professionals seeking a reliable sealant for various household and construction applications. The Everbuild General Purpose Silicone in Grey offers a durable, waterproof seal with anti-fungal properties, ideal for humid environments. A potential caveat is its mid-modulus nature, which may not be suitable for applications requiring extreme flexibility or adhesion to porous surfaces without proper preparation.
All features
Colour
Grey
Model Part Number
GPSGY
Brand
Everbuild
Extended Product Information
FAQs
Can this grey silicone sealant be painted over?
No, Everbuild General Purpose Silicone is not designed to be painted over once cured. It's best to achieve the desired colour finish with the sealant itself or use a paintable sealant for painted surfaces.
What is the shelf life of this product?
Unopened cartridges typically have a shelf life of 12-18 months when stored in cool, dry conditions. Once opened, it is best used within a few weeks for optimal performance.
How long does it take to cure?
The sealant skins over in approximately 15-30 minutes and fully cures within 24-48 hours, depending on bead size, temperature, and humidity. Avoid stressing the seal until fully cured.
Is this suitable for exterior use?
Yes, it is suitable for exterior use, providing a waterproof and weather-resistant seal for applications like window frames and gutter joints.
Can I use this on natural stone?
It is generally not recommended for use on porous natural stone as it can cause staining. Always test on an inconspicuous area or consult the manufacturer's guidelines for specific stone types.
What is the difference between mid-modulus and high-modulus silicone?
Mid-modulus silicones offer a balance of adhesion and flexibility, suitable for general-purpose sealing with moderate movement. High-modulus silicones are more flexible and designed for larger movement joints or specific applications like structural glazing.
How do I remove old silicone sealant?
Carefully cut along the edges of the old sealant with a sharp knife or sealant removal tool. Apply a silicone remover product if necessary to soften stubborn residue, then wipe clean.
Troubleshooting
Sealant not extruding from cartridge
Ensure the inner seal is pierced and the cartridge is correctly loaded into the sealant gun. Check if the nozzle is clear.
Poor adhesion to surface
Verify the surface is clean, dry, and free from dust, grease, or old sealant. For some materials, a primer might be necessary.
Uneven or messy sealant bead
Practice application on a scrap surface. Ensure the nozzle is cut at the correct angle and apply steady pressure to the sealant gun. Smooth the bead immediately after application.
Mould growth persists
While the sealant contains anti-fungal agents, severe persistent mould may indicate inadequate ventilation or excessive moisture. Address the underlying issue and ensure the area is cleaned regularly.
Sealant remains tacky after application
Ensure the product has not passed its expiry date. Application in extremely low temperatures or high humidity can slow curing. Allow sufficient time for full cure in appropriate conditions.
Pros and Cons
Pros
Effective anti-fungal properties for damp areas
Forms a strong, waterproof, and flexible seal
Adheres well to common non-porous building materials
Easy to apply with a standard sealant gun
Resistant to dirt and staining
Accommodates joint movement
Cons
Mid-modulus may not be ideal for very high movement joints
Not recommended for porous surfaces without priming
Requires a sealant gun for application
Cured sealant cannot be painted over
Specific grey colour may not match all décors
Setup, Compatibility & Care Instructions
Setup:
Ensure the surface is clean, dry, and free from dust, grease, and old sealant.
Cut the nozzle at an angle to achieve the desired bead size.
Pierce the inner seal of the cartridge.
Load the cartridge into a standard sealant gun.
Apply a continuous bead of sealant to the joint.
Smooth the bead immediately using a wet finger or smoothing tool.
Remove excess sealant before it cures.
Compatibility:
Adheres to: Most smooth, non-porous surfaces including glass, aluminium, UPVC, laminates, ceramics, and painted surfaces.
Not Recommended For: Porous materials (e.g., unsealed concrete, brickwork) without appropriate priming. Avoid contact with certain plastics and rubbers where migration staining may occur.
Movement: Accommodates joint movement of +/- 12.5%.
Care:
Cleaning: Wipe away any uncured residue with a damp cloth. Cured sealant can be carefully trimmed or removed with a sealant removal tool.
Maintenance: The anti-fungal properties help maintain a clean appearance in damp conditions. Regular cleaning with mild detergent is recommended.