Black Sikaflex-621 PU Bonding & Sealing Adhesive – 300ml Cartridge

Sikaflex-621 Black by Sika is a high-quality, one-component polyurethane (PU) adhesive and sealant designed for reliable bonding and sealing applications. Featuring moisture-curing technology and primerless adhesion to many metals, plastics and paint coatings, it provides a durable, flexible seal for professional use.

Package Contents

• 1 × Black Sikaflex-621 Adhesive & Sealant Cartridge

• Cartridge size: 300ml

• Colour: Black

Applications

Suitable for a wide range of bonding and sealing tasks in:

• Vehicle repair and automotive applications

• Industrial manufacturing

• Appliances and building components

• Interior and exterior applications

• Timber, metals, plastics and painted surfaces, subject to compatibility testing

Key Features & Benefits

• Strong bonding and reliable sealing for a variety of applications

• Primerless adhesion to many metals, plastics and paint coatings

• Paintable after curing

• Low monomeric diisocyanate content: below 0.1%

• Good resistance to weathering and ageing

• Flexible cured material with approximately 35 Shore A hardness

• Elongation at break of approximately 600%

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

• Skin formation time: approximately 45 minutes

Application Information

• Recommended application temperature: +5°C to +40°C

• Carry out an adhesion test on the original substrate before use.

• Intended for experienced professional users. Always follow the manufacturer's technical data sheet and safety instructions.

Please note: Performance may vary depending on the substrate, surface preparation and application conditions. Check material compatibility before use.