Sealant‑adhesive Sika Sikaflex‑11 FC Purform, cartridge 300 ml, basalt grey

Sika Sikaflex‑11 FC Purform is a professional one‑component polyurethane sealant‑adhesive supplied in a 300 ml cartridge in basalt grey. Intended for bonding and elastic joint sealing on a wide range of substrates, the product provides a neutral cure polyurethane formulation that combines long‑term adhesion and flexibility. It is suitable for interior and exterior applications where a solvent‑free, low‑odour sealant is required and where movement accommodation and weather resistance are important.

Advantages

The neutral curing chemistry minimizes the risk of corrosion on sensitive metals and reduces odour during application. Sikaflex‑11 FC Purform adheres to many common construction materials and maintains elasticity over time, helping to accommodate joint movement and thermal expansion. Its cartridge format fits standard caulking guns, enabling controlled application and reduced waste on small to medium‑scale jobs.

Suitable for

• Elastic sealing of expansion and connection joints in building façades and interiors
• Bonding of trim, panels, window sills and other elements where flexible joints are needed
• Glazing perimeter sealing where neutral cure is preferred
• Sealing around door and window frames and service penetrations
• Maintenance and repair work on joints exposed to weather and temperature variations

Key specifications

• Formulation: one‑component polyurethane, neutral cure
• Packaging: 300 ml cartridge suitable for manual or pneumatic caulking guns
• Colour: basalt grey
• Elasticity: permanently elastic after curing to accommodate joint movement
• Application temperature range: suitable for typical construction site conditions (check technical datasheet for exact limits)
• Paintability: paintable after skin formation with compatible coatings (verify compatibility before use)

How to use

Prepare joint surfaces by removing dust, loose material, oil and frost. For porous substrates, use an appropriate primer if recommended by the manufacturer. Cut the cartridge tip and fit a nozzle sized to the joint width, then load into a caulking gun. Apply the sealant continuously into the joint, ensuring good contact with the substrate. Tool the sealant within the product’s skin time to obtain a smooth finish and to ensure proper adhesion. Allow the sealant to cure undisturbed; curing time depends on temperature, humidity and joint dimensions.

Usage recommendations

Use Sika Sikaflex‑11 FC Purform only on materials compatible with neutral polyurethane systems. For critical applications, test adhesion and compatibility beforehand and consult the product’s technical datasheet for detailed information on primers, maximum joint sizes, and full application conditions. Store cartridges in a cool, dry place and follow safety instructions on the packaging.