3M 540 Polyurethane Sealant Adhesive 310 ml (various options)

3M™ 540 is a single-component, flexible, moisture-curing polyurethane sealant adhesive designed for professional applications in construction, industry, and transportation. It features a low modulus of elasticity, making it ideal for sealing joints between various materials, ensuring flexibility and durability. It can be used in both vertical and horizontal gaps, and after curing, it is paintable.

Technical specifications

• Capacity: 310 ml
• Color: White, Grey
• Type: Polyurethane, single-component, moisture-curing
• Skinning time: 60–90 minutes
• Paintable: Dry and after curing
• Modulus of elasticity: Low – high flexibility
• Resistance: To weathering, moisture, and UV radiation

Application

• Sealing expansion joints (vertical and horizontal)
• Installation of aluminum curtain walls, windows, doors, and shop fronts
• Applications in the metal, transport, and marine industries
• Joints subject to structural movements or differing thermal expansion of materials
• Internal and external applications

Benefits and properties

✅ Permanently elastic bond – perfectly compensates for material movements
✅ Fast-curing and easy to apply – no mixing or priming required
✅ Paintable – aesthetic finish after curing
✅ Non-staining formula – no discoloration on adjacent materials
✅ High resistance to weathering – durability in challenging conditions
✅ Versatile application – bonds diverse substrates, increasing design flexibility

Application tips

Apply to clean, dry, and degreased surfaces. 3M™ 540 sealant adhesive can be applied using a standard cartridge gun. After application, smooth the surface before skinning begins (up to 90 minutes). Once cured, the sealant can be painted for an aesthetic finish.