Fixtech Black Fix8 Structural Silicone 300ml Cartridge

Fixtech Fix8 Black: High-Modulus Structural Silicone for Demanding Bonding and Glazing

Architectural-Grade, Neutral-Cure Sealant with 20-Year Weather Resistance

The Fixtech Fix8 Black Structural Silicone is a single-component, high-modulus, neutral-cure sealant engineered for professional structural bonding and glazing applications. Its advanced formulation delivers reliable, primerless adhesion to a wide range of substrates including metal, aluminium, Corian®, most plastics, and fibreglass, making it a versatile choice for architectural, automotive, and marine projects.

Unlike many conventional sealants, Fix8 Black offers a movement capability of 25%, allowing it to absorb dynamic stresses without compromising the bond. This permanently elastic sealant maintains flexibility over its service life, reducing the risk of adhesive failure in joints subject to thermal expansion, vibration, or structural movement.

Engineered for Harsh Australian Conditions

Fix8 Black is formulated to withstand prolonged UV exposure, salt mist, and extreme weather, providing up to 20 years of durable weather resistance. Its neutral cure system (pH 7) ensures compatibility with sensitive substrates and eliminates the corrosion risks associated with acidic sealants. The sealant is also free of isocyanates, solvents, and acids, promoting a safer application environment.

With a tensile and shear strength exceeding 1.0 MPa (ISO8339), this structural silicone delivers the mechanical integrity required for load-bearing joints in glass curtain walls, window frame installation, and roof sealing. Its excellent filling capacity accommodates joint widths from 5 mm to 30 mm, simplifying complex sealing tasks.

Key Benefits

• Primerless adhesion to most common building materials (excluding Teflon, PE, PP)
• 25% movement capability for joints subject to dynamic loads
• Exceptional UV and weather resistance for long-term outdoor performance
• Neutral cure and colour-fast – no corrosive by-products
• Permanently elastic – adapts to structural movement without cracking
• Marine-grade durability – suitable for above-waterline applications in coastal environments
• Wide joint filling range (5–30 mm width) for versatile use

Versatile Applications Across Industries

Fix8 Black is trusted by professionals for a range of demanding tasks:

• Glazing: Structural bonding of glass panels in curtain walls and window systems
• Automotive and Transportation: Sealing and bonding coachwork, mounting components, and attaching flexible solar panels to vehicle roofs
• Marine: Above-waterline sealing and bonding on boats and marine structures
• General Construction: Weatherproofing roof penetrations, expansion joints, and metal-to-metal connections

For optimal results, ensure joint surfaces are clean, dry, and free of contaminants. While Fix8 Black bonds to most substrates without primer, a compatibility test is recommended for critical applications or unusual materials. Note that this sealant is not suitable for overpainting and may exhibit slight discolouration over time in specific environments.

Technical Confidence for Professionals

Fix8 Black cures at a rate of approximately 3 mm per 24 hours, forming a tack-free surface within 3 hours under standard conditions (23°C, 50% R.H.). Its paste consistency allows for precise application via manual or pneumatic caulking gun, and tooling can be performed with a mild soapy solution before skin formation. The recommended joint design is a width-to-depth ratio of 2:1 to maximise movement accommodation.

Upgrade Your Bonding Reliability

Choose Fixtech Fix8 Black Structural Silicone for your next architectural, automotive, or marine project and experience the confidence of a high-strength, weather-resistant bond. Add the 300 ml cartridge to your order today and ensure your installation stands up to Australia's toughest conditions.