Sikaflex 221 Multipurpose Adhesive Sealant – 300ml

Sikaflex-221 is a moisture-curing, one-component polyurethane adhesive and sealant for permanent elastic sealing and simple bonding applications. It adheres to a wide range of compatible materials, including metals, metal primers, two-component paint coatings, ceramics and selected plastics.

Available in white, light grey or black, it is suitable for professional repair, installation and conversion work where a flexible, durable seal is required. Always test adhesion and material compatibility on the original substrate before application.

Key Features

• Multipurpose polyurethane adhesive and sealant
• Creates permanent elastic seals
• Bonds to a wide range of compatible substrates
• Resistant to ageing
• Can be sanded and painted after curing
• Low-odour and non-corrosive formulation

Specifications

The technical figures above come from Sika’s product data, while the UK retail colour description Light Grey is confirmed by UK suppliers.

Suitable Substrates

Sikaflex-221 may be used on compatible:

• Metals
• Metal primers
• Two-component paint coatings
• Ceramic materials
• Plastics

Compatibility must be tested on the actual substrate, particularly with plastics or materials susceptible to stress cracking.

Application Note

Surfaces must be clean, dry and free from grease, oil and dust. Sikaflex-221 is intended for experienced professional users, and adhesion should be tested on the original materials before use.

What’s Included

• 1 × Sikaflex-221 300ml cartridge in the selected colour