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.

3M 15512, Scotch-Brite EXL Unitized Wheel, XL-UW, 6A Medium, 2 in x 1/8 in x 3/16 in, 7000000705
Dynabrade 51623 .1 hp Straight-Line Extension Pencil Grinder, Central Vacuum, 1/8" Collet
Dynabrade 95842 Dynabrade Air Lube 10W/NR, 1 Pint
Dynabrade 64350 26" W x 36" L (660 mm W x 914 mm L) Metal Capture Downdraft Station, 230 V (AC)
Insize QMS-A320-U, QUICK MEASUREMENT SYSTEM, 6974029775123
3M 13717, Scotch-Brite EXL Unitized Wheel, XL-UW, 2S Fine, 3 in x 1/2 in x 1/4 in, 7000045925
3M 62612, Scotch-Weld Threadlocker TL71, Red, 10 mL Bottle, 7100039197, 10/case
3M 01021, Scotch-Brite Clean and Strip Unitized Wheel, CS-UW, 7S Extra Coarse, 4 in x 1 in x 1/4 in, 7000120868
Dynabrade 51633 .1 hp Straight-Line Extension Pencil Grinder, Central Vacuum, 1/8" Collet
3M 65082, Scotch Brite Roloc Deburr & Finish PRO Unitized Wheel, DP-UR, 6C Medium+, TR, 2 in x 1/4 in x NH, 7100081367
3M 13184, Scotch-Brite Multi-Finishing Wheel, MU-WL, 2S Fine, 8 in x 1 in x 3 in, 7000120808
Standard Abrasives 811027, Type 27 Cleaning Disc, 4-1/2 in x 1/2 in x 7/8 in, 7000046837
3M 77115, Scotch Brite Roloc Deburr & Finish PRO Unitized Wheel, DP-UR, 4C Medium+, TR, 2 in x 1/4 in x NH, 7100086108
3M 62816, Adhesive Sealant 760 UV, White, 600 mL Sausage Pack, 7000046609, 12/Case
3M 94927, Scotch-Brite EXL PRO Deburring Wheel, EP-WL, 10S Fine, 8 in x 1/2 in x 3 in, 7100062983
Dynabrade 60051 .1 hp Straight-Line Quick-Change Pencil Grinder, Rear Exhaust, 60,000 RPM, 1/8" Collet
3M 14063, Scotch-Brite EXL Unitized Wheel, XL-UW, 6A Medium, 1 in x 1 in x 3/16 in, 7100001140
3M 01661, Scotch-Brite Light Deburring Wheel, LD-WL, 7S Fine, 6 in x 1 in x 1 in, 7000000730
Dynabrade 51812 .1 hp Straight-Line Pencil Grinder, Rear Exhaust, 1000,000 RPM, 3/32" Collet
3M 65083, Scotch Brite Roloc Deburr & Finish PRO Unitized Wheel, DP-UR, 6C Medium+, TR, 3 in x 1/4 in x NH, 7100081365
3M 03700, Scotch-Brite Cut and Polish Unitized Wheel, CP-UW, 7A Medium, 1 in x 1 in x 3/16 in, 7000045846
3M 01581, Scotch-Brite Cut and Polish Unitized Wheel, CP-UW, 5A Fine, 6 in x 1/4 in x 1/2 in, 7010364174
Standard Abrasives 854953, GP Plus Wheel, 12 in x 1 in x 5 in 9S FIN, 7000047126 
