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 55404 Vanes, 4/Set, Vaned Pencil Grinder
Dynabrade 90211 1/8" W x 18" L 60 Grit A/O DynaCut Belt, 50/pack
Dynabrade 51347 3" (51 mm) Dia. Locking-Type Disc Pad, Medium Density, 3/8"-24 Thread
Dynabrade 90272 3-1/2" W x 15-1/2" L 60 Grit A/Z DynaCut Belt, 10/ Pack
Dynabrade 79145 1/4" W x 24" L 60 Grit DynaCut Premium Ceramic Belt, 50/pack
Dynabrade 51458 6"-8" (152 mm-203 mm) Dia. Right Angle Two-Hand Rotary Buffer
Dynabrade 13502 Dynastraight Finishing Tool, 1 HP, Rear Exhaust, 3,400 RPM, 1/2" (13 mm) Dia. Arbor
Dynabrade 82489 6" Dia. x 100 Grit A/O Vacuum PSA Filmbac DynaCut Disc, 100/Pack
Dynabrade 90297 1/2" W x 18" L Coarse NWN DynaBrite Premium Belts, 10/pack
Dynabrade 92116 1/2" W x 12" L 320 Grit A/O DynaCut Belt, 50/pack
Dynabrade 90254 3/4" W x 18" L 180 Grit Ceramic DynaCut Belt, 50/pack
Dynabrade 78710 5/16" x 5/8"-B53 Dynacut A/O Mounted Point, 5/pack
Dynabrade 55204 Vane Set (4pk)
Dynabrade 45209 Sleeve for 48201, 25,000 RPM
Dynabrade 59380 Rotor/Vane Set
Dynabrade 59020S - 5" Non-Vac Dynorbital Spirit Random Orbital Sander
Dynabrade 11078 Contact Wheel Ass'y, 5/8" Dia. x 3/8" W x 3/8" I.D., Crown Face, 70 Duro Rubber
Dynabrade 56323 3-7/8" x 5-5/8" Vacuum Dynabug II Disc Pad, Hook-Face, Short Nap
Dynabrade 90292 1/2" W x 18" L Medium NWN DynaBrite Premium Belts, 10/pack
Dynabrade 11011 Idler Arm Assembly
Dynabrade 96425 Screws For Vacuum Shroud (57737)
Dynabrade 18426 Vane Set (4pk) 
