Polyurethane Sealant-Adhesive Soudal SF40 600 ml Gray

Soudal SF40 600 ml Gray is a polyurethane-based sealant and adhesive formulated for construction and renovation tasks that require elastic, weather-resistant joints. Supplied in a 600 ml cartridge, this gray sealant bonds to common building substrates and cures to form a durable, flexible seal that resists movement and outdoor exposure. It is intended for use on facades, window and door frames, and general repair where a combination of adhesion and elasticity is needed.

Advantages

Soudal SF40 offers strong initial tack and long-term adhesion to materials like concrete, brick, stone, wood and some coated surfaces, delivering a flexible joint that accommodates thermal and structural movement. Its polyurethane chemistry provides good mechanical strength after curing and improved resistance to weathering compared with non-polyurethane fillers. The gray color blends with many façade and frame finishes and the cartridge format is compatible with standard caulking guns for controlled application.

Suitable for

• Sealing joints around window and door frames
• Bonding and gap-filling on facades and masonry
• General repairs where elastic, weather-resistant seals are required
• Applications that need adhesion to concrete, brick, stone or wood

When it may not be suitable

This polyurethane sealant may not be appropriate for use on certain plastics, polyethylene, polypropylene, or other non-porous substrates without prior surface treatment or a primer. It is not intended for continuous water immersion or for use where paintability is a strict requirement unless compatibility with specific paints is verified. Surfaces heavily contaminated with oil, grease, or loose material must be cleaned prior to application to achieve effective bonding.

Key specifications

• Base: Polyurethane
• Packaging: 600 ml cartridge
• Color: Gray
• Function: Sealant and adhesive with elastic cured state
• Application: Exterior and interior joints, bonding, gap-filling

How to use

Ensure surfaces are clean, dry and free of dust, grease or loose particles. Cut the cartridge tip to the desired bead size, fit a suitable nozzle and apply with a standard caulking gun. Tool the sealant within its skin-formation time to obtain a smooth finish and improved adhesion to joint faces. Allow adequate curing time as recommended by the manufacturer before subjecting the joint to movement or finishing. For porous or heavily absorbent substrates, pre-wetting or a primer may improve adhesion; for non-porous surfaces consult technical guidance.

What to consider before purchase

• Confirm compatibility with the substrates you intend to bond or seal
• Check whether the gray color matches your finish requirements
• Consider environmental exposure and whether the product suits exterior conditions
• Verify the cartridge size and that you have a compatible dispensing gun

Usage recommendations

Apply at recommended temperatures and avoid excessive joint movement during curing. Store cartridges upright in a cool, dry place and follow safety instructions on the packaging. For best results on critical substrates, perform a small test application first or consult the manufacturer's technical datasheet.