Everbuild Sikaflex Silicone Sealant 300ml – Grey

Everbuild Sikaflex Silicone Sealant in Grey is a professional-grade, one-component neutral cure silicone sealant developed for long-lasting internal and external sealing applications. Its versatile grey finish complements concrete, render, slate, aluminium and other modern construction materials, making it a popular choice for commercial and domestic projects.

The neutral cure formulation is safe to use on sensitive materials such as natural stone, marble and mirrors, where traditional acetoxy silicones may cause staining or corrosion. Once cured, the sealant forms a permanently flexible, waterproof joint with excellent resistance to UV exposure, weathering and everyday cleaning products.

Available from Hart Wholesale, this high-performance silicone is ideal for professional builders, installers, fabricators and DIY users looking for a durable, colour-matched seal.

Key Features

• Professional neutral cure silicone
• Grey colour for modern construction finishes
• Suitable for internal and external applications
• Excellent adhesion to most common building materials
• Waterproof and weatherproof
• UV resistant
• Permanently flexible
• Non-corrosive formulation
• Suitable for sensitive substrates
• Low odour during curing
• Easy application using a standard cartridge gun
• 300ml cartridge

Ideal Applications

• Window frame sealing
• Door frame sealing
• Expansion joints
• Perimeter sealing
• Curtain walling
• Concrete joints
• Render joints
• Slate detailing
• Roofline sealing
• Kitchen installations
• Bathroom installations
• Conservatories
• General construction
• Glazing applications

Suitable Materials

• Concrete
• Render
• Slate
• Glass
• Aluminium
• Stainless Steel
• UPVC
• PVC
• Ceramic
• Natural Stone
• Marble
• Mirrors
• Painted Surfaces
• Most non-porous building materials

Technical Specification

Professional Grey Neutral Cure Silicone Sealant

Everbuild Sikaflex Silicone Sealant provides a durable, flexible seal that performs in demanding construction environments. Its neutral cure technology makes it suitable for use on natural stone, marble and mirrors while delivering long-term weather resistance for glazing, perimeter sealing and expansion joints.

The grey colour is particularly suited to modern buildings where it blends neatly with concrete, render, slate and aluminium frames for a clean, professional finish.

Frequently Asked Questions

Is Everbuild Sikaflex Silicone suitable for natural stone?
Yes. The neutral cure formulation is suitable for use on natural stone, marble and other sensitive substrates where acetoxy silicones are not recommended.

Can this silicone be used outside?
Yes. It is suitable for both internal and external applications and provides excellent UV and weather resistance.

What colour does the grey silicone match?
Grey blends well with concrete, render, slate, aluminium, metal frames and many modern building materials.

Is the seal waterproof?
Yes. Once cured it forms a waterproof, permanently flexible seal suitable for construction and glazing applications.