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.

Dynabrade 58034 1-1/4" Dia. Right Angle Mini-Orbital Sander, 4K RPM, .4Hp, Rear Exhaust
Dynabrade 15420 Dynafile III Abrasive Belt Tool
Dynabrade 91167 1/2" W x 13" L 120 Grit A/O DynaCut Belt, 50/pack
Dynabrade 53533 Cone or Plug Grinder (Triple Extension)
Norton 66261014792 - 2" Medium Grade Aluminum Oxide Bear-Tex Speed-Lok High Strength Maroon TR Non-Woven Abrasive Disc 160 Each
3M 13372, Scotch-Brite Star, 3 in A CRS LS, 7000120967
Dynabrade 13509 Dynastraight Finishing Tool, Rear Exhaust, 6,000 RPM, 5/8" (16 mm) or 1" (25 mm) Dia. Arbor
Standard Abrasives 713296, Aluminum Oxide Handy Roll, P320 J-weight, 2 in x 50 yd, 7100034517
Norton 66261043421 - 2" Dia. Disc, 120 Grit, Blaze, 2 Ply, Flex W/ Quick-Change, 25 Each
Dynabrade 58515 2-3/4" W x 7-3/4" L Dynabug II Orbital Sander, Central Vacuum, .11 hp, 8,000 RPM, 3/16" Orbit
Dynabrade 11475 Dynabelter Abrasive Belt Tool, Standard Duty
Dynabrade 53270 7" (180 mm) Dia. Right-Angle Disc Sander
Dynabrade 40320 Dynafile II Abrasive Belt Tool
3M 05027, Utility Cloth Roll 211K, 150 J-weight, 1-1/2 in x 50 yd, Full-flex, 7100031693
Standard Abrasives 713276, Aluminum Oxide Handy Roll, P180 J-weight, 2 in x 50 yd, 7100037246
Dynabrade 14010 Dynafile Abrasive Belt Tool Versatility Kit
Dynabrade 14360 Pneumatic Pipe Belt Finisher
Standard Abrasives 863110, A/O Unitized Wheel, 631, 2 in x 1/4 in x 1/4 in, 7000144629
3M 08367, Urethane Seam Sealer, Black, 310 mL Cartridge, 7000119968, 12 per case 
