Silicone adhesives and sealants offer unmatched versatility across the most demanding bonding and sealing applications. Formulated from polydimethylsiloxane (PDMS) polymers, these solutions provide outstanding adhesion to metals, glass, and plastics combined with exceptional resistance to extreme temperatures (-60°C to +200°C), UV radiation, moisture, and harsh chemicals.
Silicone sealant technologies encompass acetoxy cure, neutral (oxime/alkoxy) cure, and addition-cure (platinum-catalysed) systems — each optimised for specific application requirements. Neutral cure silicones are particularly favoured for sensitive electronic and solar applications where corrosive by-products must be avoided. From PV module assembly to automotive under-hood sealing, silicone provides reliable long-term performance where other adhesive chemistries fall short.
Ensure surfaces are clean, dry, and free from frost, dust, grease, old sealant, and other contaminants that could impair adhesion.
Clean non-porous surfaces (metals, glass, plastics) by wiping with a suitable solvent (isopropanol or xylene) on a lint-free cloth before application.
Apply sealant using a pneumatic or manual caulking gun. For solar and electronics applications, use precision dispensing equipment for consistent bead profiles.
Tool the sealant within the specified tooling time (typically 5–15 minutes depending on product) using a spatula or tool dipped in soapy water.
Allow full cure before exposing the bond to stress or service conditions — neutral cure silicones typically cure at 2–3 mm per 24 hours at 23°C/50% RH.
When using any solvent for surface preparation, always ensure adequate ventilation. Avoid heat, sparks, and open flames near solvents.
Silicone potting and encapsulation compounds protect sensitive electronic components and assemblies from environmental hazards including moisture, dust, chemicals, and mechanical shocks. These solutions are vital in extending the life of electronic devices, providing electrical insulation, and preventing short circuits. Applications span automotive ECUs, aerospace avionics, medical devices, solar PV junction boxes, and industrial power supplies.
Purpose-engineered neutral cure silicone sealants for photovoltaic module assembly provide non-corrosive bonding to aluminium frames, glass panels, junction boxes, and TPT/TPE back sheet materials. With high modulus for mechanical stability, excellent UV resistance for 25+ year outdoor exposure, and flame retardant performance to UL 94 HB, these sealants ensure long-term reliability and safety of solar installations.
Acetoxy (acid) cure silicones release acetic acid during curing and are faster curing but can corrode metals like copper and aluminium. Neutral (oxime/alkoxy) cure silicones release non-corrosive by-products, making them essential for solar panels, electronics, and metal-intensive assemblies where corrosion must be avoided.
Standard silicone adhesives and sealants maintain their properties from -60°C to +200°C continuously, with some specialty formulations rated for intermittent exposure up to +300°C. This makes them ideal for automotive under-hood, solar, and aerospace applications.
While standard silicone sealants are primarily designed for sealing and flexible bonding, high-modulus silicone adhesives can provide structural bonding capability. For high-stress structural applications, we may recommend polyurethane or modified silane adhesives as alternatives — contact us for application-specific guidance.
Silicone sealants form a surface skin within 5–20 minutes and cure at approximately 2–3 mm depth per 24 hours at standard conditions (23°C, 50% RH). Full cure of a typical 10 mm joint takes approximately 3–5 days. Curing speed increases with higher temperature and humidity.
Absolutely. Neutral cure silicone sealants are the industry standard for solar PV module assembly due to their exceptional UV resistance, non-corrosive cure chemistry, wide operating temperature range, and proven 25+ year outdoor durability. They bond reliably to glass, aluminium frames, and junction box materials.
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