Multi Purpose Sealant with Good UV Resistance
3M Polyurethane Sealant 540 is a single component, moisture curing, polyurethane sealant used to bond a wide variety of materials, including plastics, fiberglass reinforced plastic (FRP), sheet molding compound (SMC), aluminum, steel, coated metal and wood. It exhibits high tensile strength, good UV resistance, low Shore A hardness and low modulus to maintain its functionality in a wide range of extreme service environments. Available in cartridge, sausage pack, pail and drum volumes to meet your application needs.
Recommended Applications
- Vertical and horizontal panel bonding and joint sealing
- Aluminum curtain walls and storefronts
- Transportation manufacturing (bus, rail, truck, trailer)
- Replacement of mechanical fasteners in many situations
Paintable after Skin Forms for Improved Appearance
3M Polyurethane Sealant 540 offers an alternative to mechanical fasteners and can replace rivets in some applications. It will bond dissimilar substrates and a wide selection of materials. This will perform in temperatures ranging from 40?F/ 40?C to 194?F/90?C. Once skin forms (60 90 minutes), the sealant can be painted to improve the final finish.
Understanding Polyurethane Sealants
Polyurethane sealants provide strong, flexible durable elastomeric bonds that seal against the elements. These sealants excel in challenging industrial, transportation and construction applications. Polyurethane sealants are available in a wide variety of Shore A hardness, open time and colors to meet many application needs. Choose a 3M Manual or Pneumatic Applicator for dispensing 3M adhesives sealant cartridges and 400ml/600ml sausage packs.
Bringing Better Ideas to the Surface through Science and Innovation
In our 3M Industrial Adhesives and Tapes Division, we apply the science of adhesion to deliver innovative solutions that improve the design and manufacturing processes of companies around the world. In the end, our technologies help customers like you deliver competitive products to the market faster and more efficiently.

Standard Abrasives 701100, A/O Tapered Cone Point, D-40 120, 7010310892, 100 per case
3M 07461, Scotch-Brite Roloc Coating Removal Disc, 07461, CR-DH, TR, 3 in, 7100258410, 25 per case
3M 45020, Diamond Grade DG3 Reflective Digital Sheeting 4081UDS, Fluorescent Yellow, 30 in x 50 yd, 1 Roll/Case, 7100282390
3M 18424, Scotch-Brite Coating Removal Disc, CR-DH, SiC Extra Coarse, 4-1/2 in x NH, 7000046011
3M 18470, Scotch-Brite Roloc Coating Removal Disc, CR-DR, SiC Extra Coarse, TR, 4 in, 7100021755, 40 per case
3M 18483, Scotch-Brite Coating Removal Disc, 5 in x NH S XCS Bulk, 7000046033
Dynabrade 14000 Dynafile Abrasive Belt Tool
3M 18364, Scotch-Brite Roloc Coating Removal Disc, CR-DR, SiC Extra Coarse, 18364, 2 in x NH, 7000046010, 60 per case
3M 18355, Scotch-Brite Coating Removal Disc, CR-DH, SiC Extra Coarse, 5 in x NH, 7000120845
3M 18485, Scotch-Brite Coating Removal Disc, 7 in x NH S XCS Bulk, 7000120884
Air Turbine Tools 201SV - 3mm Straight Hand Tool Series with Brake, 90,000 RPM, 32173
3M 06839, Booth Coating, 1 Galllon, 7000028421
3M 49056, Polyurethane Adhesive Sealant 560, White, 310 mL Cartridge, 7000000945, 12/case 
