Light Grey Sikaflex-621 PU Bonding & Sealing Adhesive – 300ml

Sikaflex-621 by Sika is a high-performance, one-component polyurethane (PU) adhesive and sealant designed for reliable bonding and sealing applications. It cures through exposure to atmospheric moisture and provides durable adhesion to a wide range of materials, including metals, plastics and painted surfaces.

Its light grey colour makes it suitable for applications where a neat, professional finish is required. Once fully cured, the product can be painted, making it ideal for vehicle repairs, industrial manufacturing, appliances and building components.

Key Features

• Brand: Sika

• Product: Sikaflex-621

• Colour: Light Grey

• Size: 300ml cartridge

• Type: One-component polyurethane (PU) adhesive and sealant

• Primerless adhesion to many metals, plastics and paint coatings

• Paintable after curing

• Good resistance to weathering and ageing

• Suitable for interior and exterior applications

• Low monomeric diisocyanate content (below 0.1%)

Typical Applications

Suitable for bonding and sealing in vehicle repair, industrial manufacturing, appliances and building components, subject to material compatibility.

Technical Information

• Shore A hardness after curing: approximately 35

• Elongation at break: approximately 600%

• Service temperature range: -50°C to +90°C

• Skin formation time: approximately 45 minutes

Package Includes

• 1 × Light Grey Sikaflex-621 PU Bonding & Sealing Adhesive, 300ml cartridge

Important Information

For professional and experienced users. Apply at temperatures between +5°C and +40°C. Always carry out an adhesion test on the original substrate before use and follow the manufacturer's instructions.