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 64355 Cover
3M 80794, Cartridge Roll 747D, 3/8 in x 1 in x 1/8 in, 80 X-weight, 7100122978
Dynabrade 57736 - 8" Overskirt
Dynabrade 53072 1/4" Right Angle Drill, .4 HP, Rear Exhaust, 950 RPM
Dynabrade 60000 Dynuba 100, 11.25 oz. Aerosol Can
Dynabrade 95398 Bearing
Dynabrade 01464 Seal
Air Turbine Tools 525DM - 6mm Straight Hand Tool Series, 40,000 RPM, 32543
Dynabrade 52277 .7 hp Straight-Line Die Grinder, Rear Exhaust, 18,000 RPM, 1/4" Collet
Dynabrade 15108 Knob Assembly
Dynabrade 52638 4-1/2" (114 mm) Dia. Right Angle Depressed Center Wheel Grinder
Dynabrade 90825 5" Dia. x 3" W, Coarse, Non-Woven DynaBrite Band, 10/pack
Dynabrade 32015 Wet Hat Filter (For model 61205)
Dynabrade 01111 Drive Wheel
Dynabrade 54391 .7 hp Extended Right Angle Die Grinder, Rear Exhaust, 18,000 RPM, 1/4" Collet
Dynabrade 57893 Front Bearing Plate
Dynabrade 01139 Bearing
Dynabrade 53074 1/4" Right Angle Drill, .4 HP, Rear Exhaust, 5,000 RPM
Dynabrade 52987 3/8" Drill, .4 HP, Rear Exhaust, 1,000 RPM
Dynabrade 78050 1/2" W x 24" L Medium NWN DynaBrite Belt, 10/pack
Dynabrade 95734 1/4" NPT Flow Control Dynaswivel
Dynabrade 11642 Contact Wheel Ass'y, 4" Dia. x 5/8" W x 5/8" I.D., Scoop Face, 40 Duro Rubber
Dynabrade Nitro Series 50218 Nitro Tool .5hp Die Grinder Kit
Dynabrade NS11V 11" Dia. Random Orbital Sander, Vacuum
3M 08024, Adhesive Sealant 740 UV, Black, 290 mL Cartridge, 7100115542, 12 per case 
