Sikaflex 11 FC+ 600ml Polyurethane Adhesive Sealant

Sikaflex 11 FC+ Multipurpose Elastic Adhesive & Joint Sealant

Sikaflex 11 FC+ is a 1-part polyurethane adhesive-sealant designed for bonding and sealing most common construction materials. It offers excellent workability, strong adhesion, and long-lasting elasticity for both internal and external applications.

Key Uses

• As an adhesive to bond construction components and materials such as: Concrete, masonry, cast stone, ceramic, wood, metal, glass
• As a sealant: Vertical joints, horizontal joints

Features & Benefits

• Movement capability ±35%
• Bonds well to approved substrates without pre-treatment
• Good mechanical strength and weathering resistance
• Pick-resistant sealant
• Cured sealant is sandable
• Very low emissions
• CE-marked adhesive-sealant

Product Information

• Technology: i-Cure polyurethane
• Packaging:
  • 300 ml cartridge (12 per box)
  • 600 ml foil pack (20 per box)
• Colours:
  • 300 ml: Concrete Grey, Black, White
  • 600 ml: Concrete Grey, Black, White, Japan Beige
• Density: ~1.35 kg/L

Important Considerations

• Apply at +20°C for best workability
• Avoid application during rapid temperature changes
• Test paint compatibility before overcoating
• Allow full cure before painting
• Colour variations may occur from chemicals, heat or UV exposure
• Use mechanical fixings for overhead or heavy components
• Provide temporary support for very heavy items during curing
• Full-surface bonding is not recommended
• Not suitable for bitumen, natural rubber, EPDM or substrates that leach plasticisers
• Not suitable for PE, PP, PTFE/Teflon or certain plasticised materials
• Not for swimming pools, submerged joints or water-pressure areas
• Not for sanitary joints, glass sealing or trafficked floor joints
• Not for structural bonding or exposed structural glass
• Keep uncured product away from alcohol-containing products

Substrate Preparation

Surfaces must be clean, dry, sound and free from dust, oil, grease, laitance, old sealant or weak material. Use wire brushing, grinding or mechanical cleaning. Repair damaged areas using suitable Sika repair mortars. Remove all dust before applying activators, primers or sealant.

Priming & Pretreatment

For high-performance or critical applications, follow the priming recommendations below:

Non-Porous Substrates

• Aluminium, anodised aluminium, stainless steel, galvanised steel, glazed tiles: Light abrasion → clean → Sika Aktivator-205
• Brass, bronze, copper, titanium-zinc: Light abrasion → clean → Sika Aktivator-205 → Sika Primer-3 N
• Powder-coated metals: Perform adhesion tests
• PVC: Clean → Sika Primer-215

Porous Substrates

• Concrete, aerated concrete, cement renders, mortar, brick: Apply Sika® Primer-3 N (avoid puddling)

Note: Primers and activators promote adhesion and durability but do not replace proper cleaning and preparation. Always refer to relevant technical datasheets for detailed guidance.

Download datasheets for full application information.

How To Videos:

Colour Accuracy Disclaimer: We have taken care to display the most accurate visuals of our products. However, we are not responsible for the colour accuracy of the device you are viewing our swatches on. These variations arise due to different computer monitors and devices (make, model and technology, as well as resolution, contrast and brightness control settings) in much the same way a scan will differ from an original image and a colour photocopy. Furthermore, coatings can exhibit variation in perceived colour depending on gloss level and application method. If you require a very specific colour match, please make your selection via actual swatches and colour boards available at our showroom.

Product Disclaimer: Ensure you read all product, technical and safety data sheets prior to application as liability falls on the applicator. All products must be applied in accordance with manufacturer’s recommended method.