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 57291 Housing for Model 56830, 12,000 RPM
Dynabrade 57737 Overskirt Shroud for Orbital Sander
Dynabrade 90353 3-1/2" W x 15-1/2" L 60 Grit A/O DynaCut Belt, 10/ pack
Dynabrade 01580 Felt Silencer
Dynabrade 52850 0.1 hp Straight-Line Variable Speed Pencil Grinder, Rear Exhaust, 35-60,000 RPM, 1/8" Collet
Dynabrade 52413 3" Dia. 7 Degree Offset Disc Sander, Rear Exhaust, .7 HP, 15,000 RPM, 3/8"-24 Thread
Dynabrade 91542 5" Dynacut Extreme Orange Premium Film Disc, 320 Grit, Hook & Loop, Vacuum Holes, 50/Box
Dynabrade 93556 2" Dia. x 1/4"-20 Female Center Thread, 320 Grit, A/O, 3-Ply, J-DynaCut Eyelet Star, 50/pack
Dynabrade 13521 Dynastraight Finishing Tool, 1 HP, Rear Exhaust, 1,800 RPM, 5/8"-11 Arbor
Dynabrade 90595 1-1/2" W x 30" L 320 Grit A/O DynaCut Belt, 50/pack
Dynabrade 22090 2-3/4" x 5" Hand Sanding Block
Dynabrade 78007 1/2" W x 12" L Medium Non-Woven DynaBrite Belts, 10/pack
Dynabrade 59179 6" Dia. Dynorbital-Spirit Random Orbital Sander, Non-Vacuum, 3/16" Orbit
Dynabrade 57113 Rotor/Vane Set
Dynabrade 11399 Type 27 Wheel Mounting Adapter Kit
Dynabrade 96238 Dowel Pin
Dynabrade 11219 Contact Arm Ass'y, 1" Dia. x 3/8" W, Radiused Rubber Wheel, with no Platen
Dynabrade 45201 Sleeve for 48325, 25,000 RPM
Dynabrade 07136 Handle Grip
Dynabrade 58514 2-3/4" W x 7-3/4" L Dynabug II Orbital Sander, Non-Vacuum, .11 hp, 8,000 RPM, 3/16" Orbit
Dynabrade 07107 Vane Set (5pk)
Dynabrade 56318 3-1/4" x 5" Vacuum Dynabug II Disc Pad, Hook-Face, Short Nap
Dynabrade 11286 Contact Arm Ass'y, 5/8" Dia. x 3/8" W, Rubber Wheel, with 1/2" W Platen
Dynabrade 53690 Grip
Dynabrade 50771 Shroud-3"
Dynabrade 11518 Rubber Drive Wheel
Dynabrade 93172 4" Dia. X 1/4" Dia. Shank, 320 Grit, A/O, Spindle-Mount Sanding Star
Dynabrade 79027 1/4" W x 18" L 60 Grit A/Z DynaCut Belt, 50/pack
Dynabrade 90673 1/2" W x 30" L 120 Grit A/O DynaCut Belt, 50/pack
Dynabrade 50267 4-1/2" Dia. Disc Backing Pad, 5/8"-11 Thread
Dynabrade 11201 Contact Arm Ass'y, 5/16" Dia. x 3/8" W, Steel Wheel, with 1/2" W Platen
Dynabrade 79824 3" P2500 Grit Dynasoft Finishing Film Non Vac Hook Face Disc, 50 per box
Dynabrade 58418 6" Dia.Two-Hand Dynorbital Random Orbital Sander, Non-Vacuum
Dynabrade 56177 6" Dia. Non-Vacuum Disc Pad, Vinyl-Face
Dynabrade 64671 Replacement Class II Pleated Panel Filter Cartridge
Dynabrade 01024 O-Ring 
