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 43488 Shaft, Extension Die Grinder, 3"
Dynabrade 80459 HEPA13 Filter
3M 10299, Scotch Vinyl Color Coding Electrical Tape 35, 1/2 in x 20 ft, Brown, 7000132638
Dynabrade 57365 Shaft Balancer
Dynabrade 78705 1-1/2" x 8-32 Female Center Thread, Medium, Dynabrite Surface Conditioning Eyelet Star, 50/pack
Dynabrade X61VHS 6" Dia. Central-Vacuum Dynorbital Extreme Random Orbital Sander with Speed Regulator
Dynabrade 91552 5" Dynacut Extreme Orange Premium Film Disc, 400 Grit, Hook & Loop, Non-Vacuum, 50/Box
Dynabrade 59117 3" Dia. Central Vacuum HiVac Dynorbital-Spirit Random Orbital Sander, 3/16" Orbit
Dynabrade Dynacut 94021, 10-piece, Alloy Specific Burr Kit (for Nickel & Titanium), 1/8" Shank
Dynabrade Nitro Series NZ1 NitroZip, Eraser Tool
Dynabrade 11078 Contact Wheel Ass'y, 5/8" Dia. x 3/8" W x 3/8" I.D., Crown Face, 70 Duro Rubber
Dynabrade 91166 1/2" W x 13" L 80 Grit A/O DynaCut Belt, 50/pack
Dynabrade 96529 Tune-Up Kit for .7 hp Motor, Front and Rear Exhaust
Dynabrade 57113 Rotor/Vane Set
Dynabrade 50107 2" Dia. Disc Backup Pad, 1/4"-20 Thread, PSA
Dynabrade 92246 4" Dia. x 3/4" W Bent Medium Wire Wheel
3M 92572, Temflex Vinyl Electrical Tape 165, Gray, 3/4 in x 60 ft (19 mm x 18 m), 6 mil, 7100169192
Dynabrade 91629 1-1/2" W x 24" L 320 Grit A/O DynaCut Belt, 10/pack
3M 08027, Marine Grade Silicone Sealant, White, 304 mL Cartridge, 7000120476, 12/Case 
