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 64404 36" W x 60" L (914 mm W x 1,524 mm L) Metal Capture Downdraft Table, 230 V (AC), Side Exhaust
3M 07959, Sanding Screen, 100 Grit, 7-7/8 in x 3/16 in, 7100160279
3M 64422, Nozzles for Two-Component Adhesive Sealant Applicator 400A-2K, 7000144625
3M 11411, Roloc Disc 361F, 50 YF-weight, TR, 1 in, Die R100N, 7000045095
3M 62791, Polyurethane Adhesive Sealant 550FC Fast Cure, White, 310 mL Cartridge, 7000000932, 12/Case
Norton 66261199696 - 3" X 1/4" X 1/4" Vortex Rapid Blend Unified Wheel, 7AM U2305, 40 Each
Norton 66261014936 3" DIA X 1/8" Thick, Bear-Tex NEX Rapid Blend Quick-Change Type III Non-Woven Unified Wheel, 40 Each
Standard Abrasives 725013, Buff and Blend Cross Buff HP, A/O VFN, 1-1/2 in x 1/2 in x 2 Ply x 8-32, 7000046831
Insize 4120-20, METRIC THREAD RING GAGE, GO, M20x2.5, 6928640341519
3M 65022, Scotch-Brite Deburr and Finish Pro Unitized Wheel, DP-UW, 6C Medium+, 3 in x 3/4 in x 1/4 in, 7100053421
3M 02960, Scotch-Brite Cut and Polish Wheel, CP-WL, 5A Fine, 6 in x 1 in x 1 in, 7100009186, Box of 3
Dynabrade 95843 Dynabrade Air Lube 10W/NR, 1 Gallon
3M 35827, Hookit Dust Extraction Flexible Sanding Block, 273 mm x 67 mm, 7100256623
3M 53914, Performance Plus Duct Tape 8979N Nuclear Red, 48 mm x 54.8 m 12.1 mil, 7000049014, 24/ case
3M 08302, Ultrapro Autobody Sealant, Clear, 5 oz Tube, 7000120449, 6 per case
3M™ 72013, Adapter 529-04-50, 110-120 VAC, 7000131705, 1 EA/Case
Dynabrade 51865 1.0 hp Trim Router (Complete), 20,000 RPM, 1/4 Collet
3M 62606, Scotch-Weld Threadlocker TL42, Blue, 50 mL Bottle, 7100039193, 10/case
3M 77197, Scotch-Brite™ Roloc™ Deburr and Finish PRO Unitized Wheel,TR, 3 in x 1/8 in x NH, 8C CRS+, 7100109130, 40/box
3M™ 72010, Replacement Filter Kit 523-01-29, 7000056891, 1 EA/Case
3M 08217, Universal Adhesive Clear - 3, 200 mL Cartridge, 7100006285, 6 per case
3M™ 72122, Portable Compressed Air Filter and Regulator Panel 256-02-01, 100 cfm, 8 outlets, with Carbon Monoxide Monitor, 7000052147, 1 EA/Case
Dynabrade 51863 .7 hp Trim Router (Complete), 20,000 RPM, 1/4 Collet
3M 76783, Cubitron II Hookit Cloth Disc 784F, 120+ XF-weight, 5 in x NH, Die 500X, 7100222757
Air Turbine Tools 310RDM - 1/4" Router Hand Tool Series, 30,000RPM, 33432
3M 77559, Cubitron II Hookit Cloth Disc 784F, 77559, 36+ to 120+, 5 in x NH, Die 500X, 7100232738
3M™ 07011, Supplied Air Respirator Hose W-9435-50/07011(AAD), 7000005373, 1 EA/Case
Dynabrade 95821 Dynabrade Air Lube 10W/NR, 4oz Bottle
3M 09099, Scotch-Brite Paint and Rust Stripper Large Area 9099NA, 7010375230
3M 47207, Polyurethane Adhesive Sealant 560, Gray, 600 mL Sausage Pack, 7100198015, 12/Case 
