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 54470 Rotor Pinion
Dynabrade 11078 Contact Wheel Ass'y, 5/8" Dia. x 3/8" W x 3/8" I.D., Crown Face, 70 Duro Rubber
Dynabrade 59179 6" Dia. Dynorbital-Spirit Random Orbital Sander, Non-Vacuum, 3/16" Orbit
Dynabrade 92102 3" W x 10-11/16" L 80 Grit A/Z DynaCut Belt, 10/pack
Dynabrade 93533 7" Mandrel for Sanding Stars w/ Flexible Tip, 3-48 Male Thread
Dynabrade 78690 D9 Cartridge Roll Mandrel 1/8" Pilot Dia. x 1" Pilot Length, 1/4" Shank Dia. x 1-1/4" Shank Length
Dynabrade 78168 1-1/4" Dia. x 220 Grit S/C Non-Vacuum PSA DynaCut Disc 25/pack
Dynabrade 21874 ND1030-B, Nut, #8 Machine
Dynabrade 57927 6" Dia. Dynabug "Model T" Orbital Sander, Non-Vacuum, 20,000 RPM, 3/32" Orbit, Hook-Face
Dynabrade 13502 Dynastraight Finishing Tool, 1 HP, Rear Exhaust, 3,400 RPM, 1/2" (13 mm) Dia. Arbor
Dynabrade 56106 5" Dia. Non-Vacuum Disc Pad, Vinyl-Face
Dynabrade 01185 Vane Set (4pk)
3M 47182, Polyurethane Adhesive Sealant 550FC Fast Cure, Gray, 600 mL Sausage Pack, 7100197990, 12/Case 
