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 78710 5/16" x 5/8"-B53 Dynacut A/O Mounted Point, 5/pack
Dynabrade 95600 Tune-Up Kit for .5 hp Motor
Dynabrade 92939 - Hub Ass'y
Dynabrade 50971 Lock Ring
Dynabrade 14230 Rubber Drive Wheel
Dynabrade 64671 Replacement Class II Pleated Panel Filter Cartridge
Dynabrade 61420 Raptor Vac Electric Portable Vacuum System
Dynabrade 79028 1/4" W x 18" L 80 Grit A/Z DynaCut Belt, 50/pack
Dynabrade 89242 3-1/2" W x 15-1/2" L Medium NWN DynaBrite Premium Belt
Dynabrade 92100 3" W x 10-11/16" L 40 Grit A/Z DynaCut Belt, 10/pack
Dynabrade 79817 3" 120 Grit Dynacut Extreme Orange Film Non Vac Hook Face Disc, 50 per box
Dynabrade 93608 3/4" Dia. x 3/8", 3-48 Female Center Thread, 240 Grit A/O, 8 Ply, J-DynaCut Cross Pad, 100/pack
Dynabrade 62347 Interface Ring
Dynabrade 56354 2-2/3" x 6-7/8" Non-Vacuum Dynabug II Disc Pad, Vinyl-Face
Dynabrade 63986 - 3" 50 Dur. Contact Wheel Kit SuperFinisher
Dynabrade 92191 2" W x 30" L 60 Grit A/Z DynaCut Belt, 10/pack
Dynabrade 78305 1-1/2" Dia. x 1" W x 1/4" Shank, 80 Grit, A/O DynaCut Flap Wheel, 10/pack
Dynabrade 64863 Variable Speed Versatility Grinder, Slack-Action, 3 hp, 460 V (AC), 3 Phase, 50/60 Hz, 2,000-8,000 SFPM, 1/4"-2" W x 72" L (6-51 mm x 122 cm) Belts
Dynabrade 15006 Mini-Dynafile II Abrasive Belt Tool Versatility Kit
Dynabrade 57244 Lever
Dynabrade 64674 Filter Cartridge
Dynabrade 79196 3-1/2" W x 15-1/2" L 60 Grit DynaCut Premium Ceramic Belt, 10/pack
Dynabrade 78118 3/4" W x 20-1/2" L Very Fine NWN DynaBrite Belt, 10/pack
Dynabrade 93658 3" Dia. x 3/8" CH 40/50 Grit Gulleted/Slotted Diamond Cut-Off Wheel
Dynabrade 95544 Gear Grease, 2.5oz. Tube
Dynabrade 15336 Rubber Drive Wheel
Dynabrade 76016 Foam Pad
Dynabrade 01825 Bearing
Dynabrade 58512 2-3/4" W x 7-3/4" L Dynabug II Orbital Sander, Central-Vacuum, .15 hp, 10,000 RPM, 3/32" Orbit 
