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 92149 1/2" W x 18" L 60 Grit Ceramic DynaCut Scalloped Edge Belt, 50/pack
Dynabrade X32V - 3" Dia. Cen-Vacuum Dynorbital® Mini Extreme Random Orbital Sander
Dynabrade 56197 6" Dia. Non-Vacuum Disc Pad, Hook-Face, Short Nap
Dynabrade 42733 Carbon Brush
Dynabrade 91758 DynaMesh 11" 500 Grit Hook & Loop Discs, 25 per box
Dynabrade 52438 5" (127 mm) Dia. 7 Degree Offset Vacuum Cut-Off Wheel Tool
Dynabrade 51811 .1 hp Straight-Line Pencil Grinder, Rear Exhaust, 1000,000 RPM, 1/16" Collet
Dynabrade 48370 .4 hp Straight-Line Die Grinder, Rear Exhaust, 25,000 RPM, 1/8" Collet
Dynabrade 51124 Collet, M8 x 1.0 Female Thread, 1/4" Capacity
Dynabrade 51029 3/8"-24 Female _ 1/4"-20 Female, 1-3/8" Length
Dynabrade 15030 Contact Arm Assembly, 5/16" Dia. x 3/8" W, Steel Wheel, with 1/2" W Platen
Dynabrade 11074 Contact Wheel Ass'y, 5/8" Dia. x 1/8" W x 3/8" I.D., Crown Face, 70 Duro Rubber
Dynabrade 14000 Dynafile Abrasive Belt Tool
3M 11411, Roloc Disc 361F, 50 YF-weight, TR, 1 in, Die R100N, 7000045095
Dynabrade 79962 5" Dia. x 120 Grit Vacuum Hook-Face DynaCut Disc, 100/Pack
Dynabrade 33133 NDDP1013, Shuttle Valve
Dynabrade 76018 - 8 mm Air Line Ass'y, 5' Long
Dynabrade 95843 Dynabrade Air Lube 10W/NR, 1 Gallon
3M 08360, Urethane Seam Sealer, White, 310 mL Foil Pack, 7000036353, 6 per case 
