3M™ 540 Polyurethane Adhesive Sealant

The 3M™ 540 Polyurethane Adhesive Sealants are available in white, grey and black and come in two different forms – cartridges and encased sachet (sausage) format. 3M™ 540 is one of the best choices when it comes to sealing and we recommend it as a must-have in every tool kit.

This 3M™ Polyurethane sealant has low tensile strength, meaning it will break when stretched significantly or for a longer period of time. The adhesive skin forms within 45 to 60 minutes creating the first layer of the seal and making the sealant safe to paint on. The rate at which this 3M™ sealant cures (seals completely) will depend on the thickness of the layers, as a guide please note that the rate of cure is 3.5mm per 24 hours.

The 540 Polyurethane Adhesive will perform best when used in its typical applications. We recommend that this type of adhesive sealant is used in seam filling such as when filling drywall or whilst working with plastics. 3M™ 540 is also an excellent gap filler, which forms a high-strength bond between most solid materials in building and industrial environments. This adhesive sealant is perfect if you are looking to work with materials that will have varying degrees of thermal expansion.

The 3M™ 540 Adhesive Sealant is not isocyanate-free, please ensure proper safety gear is worn at all times when handling this product.

This sealant can be purchased in a pack of 12 or in single cartridges (please note, a minimum of two must be bought). When purchasing the 3M™ 540 Polyurethane Adhesive Sealant Sachets a minimum of 12 is required at checkout.