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 59009 5" Dia. Central Vacuum Dynorbital-Spirit Random Orbital Sander, 3/8" Orbit
3M 17596, Repulpable Strong Single Coated Tape R3187, White, 24 mm x 55 m, 7.5mil, 36 rolls per case, 7100028048
3M 30202, Disposable Plastic Wheel Maskers, 12 in - 15 in, 125 per box, 7000125074
Air Turbine Tools 202SV - 1/8" Straight Hand Tool Series with Brake, 40,000 RPM, 32244
Dynabrade 25234 Vane Set (4pk)
Dynabrade 56853 5" Dia. Self-Generated Vacuum Dynorbital Supreme Random Orbital Sander, 3/32" Orbit
3M 45722, Cubitron II Hookit Cloth Disc 947A, 120+ X-weight, 6 in x NH, D/F 6HL, Die 600HZ, 7100113871
3M 26024, PPS Series 2.0 Spray Cup System Kit, Large (28 fl oz, 850mL), 200 Micron Filter, 7100134650
Air Turbine Tools 202DM - 3mm Straight Hand Tool Series with Brake, 40,000 RPM, 32247
Air Turbine Tools 201DM - 3mm Straight Hand Tool Series with Brake, 50,000 RPM, 32157
Dynabrade 15101 Tension Arm (for Mini Dynafile II)
Dynabrade 52376 3" (76 mm) Dia. Straight-Line Type 1 Extension Wheel Grinder, 1 HP, 12,000 RPM, 3/8"-24 Spindle
Dynabrade 11475 Dynabelter Abrasive Belt Tool, Standard Duty
3M 11411, Roloc Disc 361F, 50 YF-weight, TR, 1 in, Die R100N, 7000045095
3M 26125, PPS Series 2.0 Adapter, Type S29, 8 mm Male, 1.25 mm Thread, 7100135955 
