Sealant Sika Sikaflex-11FC 300 ml black (SIK 2845)

Sika Sikaflex-11FC 300 ml black is a multi-purpose polyurethane sealant designed for elastic sealing and bonding in construction and vehicle maintenance. Supplied in a 300 ml cartridge, this black sealant cures to form a durable, flexible joint capable of withstanding normal movement and exposure common to building façades, window and door frames, body panels and trim. The product is formulated to provide adhesion to a wide range of substrates when used on properly prepared surfaces.

Advantages

The sealant offers elastic, long-lasting joints with good adhesion to many common materials when surfaces are clean and primed as required. It cures to a tough, resilient rubber-like consistency that helps absorb movement and vibration while maintaining a weather-resistant barrier. The cartridge format is compatible with standard caulking guns for controlled application, and the black colour allows for discreet finishes on dark surfaces and trims.

Suitable for

• Sealing expansion and connection joints in building façades and interior finishes
• Bonding and sealing trim, mouldings and panels on vehicles and caravans
• Sealing gaps around window and door frames where elasticity and weather resistance are required
• Repairing seams and overlaps on bodywork and metal assemblies

Key specifications

• Base: polyurethane
• Volume: 300 ml cartridge
• Colour: black
• Cure behaviour: moisture-curing to an elastic rubber-like material
• Application method: manual or pneumatic caulking gun
• Typical joint movement capability: designed for joints with normal expected movement (consult technical datasheet for exact percentages)

How to use

Prepare substrates by ensuring surfaces are clean, dry and free from dust, grease and loose particles. For non-porous or critical surfaces, follow the manufacturer's priming recommendations to improve adhesion. Cut the cartridge nozzle to the desired bead size and apply with a suitable caulking gun, maintaining steady pressure for an even bead. Tool the sealant within its skin time to achieve the required finish and joint profile. Allow the sealant to cure fully under normal ambient conditions before exposing the joint to heavy traffic or mechanical stress.

Usage recommendations

Store unopened cartridges in a cool, dry place away from direct sunlight. Do not use the sealant below recommended surface and ambient temperatures. For best adhesion and durability, test compatibility on unfamiliar substrates and follow surface preparation and priming instructions given by the manufacturer.