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 92736 2" W x 150' L 60 Micron A/O Microfinishing Film DynaCut Roll
Dynabrade 40378 Rubber Drive Wheel, Mini Dynafile II
Dynabrade 54705 Rotor/Vane Set
Dynabrade 52213 .5 hp 7 Degree Offset Die Grinder, Front Exhaust, Short Shank, 24,000 RPM, 1/4" Collet
Dynabrade 15101 Tension Arm (for Mini Dynafile II)
Dynabrade 92742 2" W x 150' L 9 Micron A/O Lapping Film DynaCut Roll
Dynabrade 67200 Utility Arm, 2" Dia. x 1", 70 Duro Serrated Urethane
Dynabrade 11026 1/2" W x 7" L DynaPad Hard Platen Pad 5-Pkg.
Dynabrade 55242 Vane Set (4pk)
Dynabrade 11017 Spacer
Dynabrade 13509 Dynastraight Finishing Tool, Rear Exhaust, 6,000 RPM, 5/8" (16 mm) or 1" (25 mm) Dia. Arbor
Dynabrade 92744 2" W x 50' L 60 Micron Diamond Microfinishing Film DynaCut Roll
Dynabrade 92778 4" W x 50' L 30 Micron Diamond Microfinishing Film DynaCut Roll
Dynabrade 78728 1/8" x 3/8"-B97 Dynacut A/O Mounted Point, Vitrified, 5/pack
Dynabrade 97406 Roll Pin
Dynabrade 18570 Vane Set (4pk)
Dynabrade 11399 Type 27 Wheel Mounting Adapter Kit
Dynabrade 93688 Spindle
Dynabrade 57127 3" (76 mm) Dia. Right Angle Depressed Center Wheel Grinder, Steel Housing, .55 HP, 15,000 RPM, 3/8"-24 Spindle
Dynabrade 92745 2" W x 50' L 40 Micron Diamond Microfinishing Film DynaCut Roll
Dynabrade 58442 6" Dia. Two-Hand Gear-Driven Sander, Non-Vacuum, Non-Vacuum, .45 HP, 900 RPM, PSA
Dynabrade 78727 3/16" x 1/2"-W154 Dynacut A/O Mounted Point, Vitrified, 5/pack
3M 08025, Adhesive Sealant 740 UV, Black, 600 mL Sausage Pack, 7100057385, 12/Case 
