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 15032 Contact Arm Assembly, 1/4" Dia. x 3/8" W, Crowned Steel Wheel, Run at 45 PSI Maximum
Dynabrade 79195 3-1/2" W x 15-1/2" L 36 Grit DynaCut Premium Ceramic Belt, 10/pack
Dynabrade 50010 Collet, 3/8"-24 Female Thread, 1/4" Capacity, 3-Piece Collet
3M 54285, Particulate Respirator 8271, P95, 7000002047, 80 EA/Case
Dynabrade 92245 - 4" (102 mm) Dia. x 3/4" (19 mm) W Bent Coarse Wire Wheel
Dynabrade 77775 5" Dia. x 7/8" Center Hole, 120 Grit, Type 27, Ceramic DynaCut Flap Disc, 10/pack
Dynabrade 59380 Rotor/Vane Set
Dynabrade 40733 Gear Housing Assembly
Dynabrade 57400 2-3/4" (70 mm) W x 8" L Dynaline Sander, Non-Vacuum
Dynabrade 48500 2" Dia. 7 Degree Offset Disc Sander, Rear Exhaust, .4 HP, 25,000 RPM
Dynabrade 78739 5/16" x 5/8"- B53 DynaFire A/O Vitrified Mounted Point, 5/pack
Dynabrade 51812 .1 hp Straight-Line Pencil Grinder, Rear Exhaust, 1000,000 RPM, 3/32" Collet
Dynabrade 78724 3/8" x 3/4"-B52 Dynacut A/O Mounted Point, Vitrified, 5/pack
Dynabrade 92102 3" W x 10-11/16" L 80 Grit A/Z DynaCut Belt, 10/pack
Dynabrade 13400 Dynisher Finishing Tool, Rear Exhaust, 3,400 RPM
Dynabrade 93166 4" Dia. X 1/4" Dia. Shank, 80 Grit, A/O, Spindle-Mount Sanding Star
Dynabrade 79810 DynaBolt AO 4" x .045" x 5/8" T1/41 Right Angle, Box of 10 Discs
Dynabrade 90226 1/4" W x 18" L 320 Grit A/O DynaCut Belt, 50/pack
Dynabrade 82489 6" Dia. x 100 Grit A/O Vacuum PSA Filmbac DynaCut Disc, 100/Pack
Dynabrade 90245 1/2" W x 18" L 220 Grit A/O DynaCut Belt, 50/pack
Dynabrade 78457 3/4" Dia. x 3/8", 3-48 Female Center Thread, 120 Grit A/O, 8 Ply, J-DynaCut Cross Pad, 100/pack
Dynabrade 01020 O-Ring
Dynabrade 56106 5" Dia. Non-Vacuum Disc Pad, Vinyl-Face
Dynabrade 79004 1/8" W x 12" L 80 Grit A/Z DynaCut Belt, 50/pack
Dynabrade 01198 Drop-In Motor for Dynafile
Dynabrade 02041 Grease Plate
Dynabrade 79075 3/8" W x 13" L 80 Grit A/Z DynaCut Belt, 50/pack
Dynabrade 95675 1/4" Male Plug with 1/4" NPT Male Thread
Dynabrade 01025 O-Ring
Dynabrade 93534 3" Mandrel for Sanding Stars, 3-48 Male Thread
Dynabrade 13531 Dynastraight 6" (152 mm) Extension Finishing Tool, 1 HP, Rear Exhaust, 1,800 RPM, 5/8"-11 Arbor
Dynabrade X62VHS 6" Dia. Vacuum Dynorbital Extreme Random Orbital Sander, Hook Pad W/ Speed Regulator
Dynabrade 13501 Dynastraight Finishing Tool, 1 HP, Rear Exhaust, 1,800 RPM, 5/8" (16 mm) or 1" (25 mm) Dia. Arbor
Dynabrade 56195 5" Dia. Non-Vacuum Disc Pad, Hook-Face, Short Nap
Dynabrade 11231 Contact Arm Ass'y, 3/4" Dia. x 1/2" W, Rubber Wheel, with 1/2" W Platen
Dynabrade 90368 3/4" W x 34" L 80 Grit A/O DynaCut Belt, 50/pack 
