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 712149, Aluminum Oxide Handy Roll, P100 J-weight, 1-1/2 in x 50 yd, 7010295370
Norton 66261043421 - 2" Dia. Disc, 120 Grit, Blaze, 2 Ply, Flex W/ Quick-Change, 25 Each
Dynabrade 64404 36" W x 60" L (914 mm W x 1,524 mm L) Metal Capture Downdraft Table, 230 V (AC), Side Exhaust
3M 01708, Scotch-Brite SST Deburring Wheel, ST-WL, 8S Fine, 8 in x 2 in x 3 in, 7000144590
Dynabrade 14000 Dynafile Abrasive Belt Tool
ACS CX1250 Diamond Belt, 1/2" X 24" 74u
Dynabrade 64350 26" W x 36" L (660 mm W x 914 mm L) Metal Capture Downdraft Station, 230 V (AC)
3M 62818, Adhesive Sealant 760 UV, Black, 600 mL Sausage Pack, 7000121496, 12/Case
Norton 66261096557 - 3" X 1/2" Blaze Rapid Strip Ceramic Alumina Extra Coarse Grade Non- Woven Abrasive Disc With Quick Change TR III Attachment, 25 Each
Dynabrade 11475 Dynabelter Abrasive Belt Tool, Standard Duty
Dynabrade 95544 Gear Grease, 2.5oz. Tube
Dynabrade 11476 Dynabelter Abrasive Belt Tool, Heavy-Duty
3M 45720, Cubitron II Hookit Cloth Disc 947A, 60+ X-weight, 6 in x NH, D/F 6HL, Die 600HZ, 7100113076
Dynabrade 95848 Dynabrade Gear Oil
Dynabrade 11684 Dynabelter Contact Arm Assembly 4" DIA X 5/8" W., 40 Duro Serrated
Dynabrade 15420 Dynafile III Abrasive Belt Tool
Dynabrade 40320 Dynafile II Abrasive Belt Tool
Dynabrade 53270 7" (180 mm) Dia. Right-Angle Disc Sander
3M 81729, Disc Pad Face Plate Ribbed, 9 in Hard Black, 7000148244 
