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 90873 2" Dia. Medium NWN DynaBrite Locking-Type Disc, 25/pack
3M 22409, Roloc Disc 361F, P120 XF-weight, TR, 1-1/2 in, Die R150S, 7000045103
3M 11412, Roloc Disc 361F, 36 YF-weight, TR, 1 in, Die R100N, 7000045092
3M 33780, 641WY 1/4" X 24", 400 Mesh Diamond Cloth Belt, 7010534915
3M 22408, Roloc Disc 361F, P100 YF-weight, TR, 1-1/2 in, Die R150S, 7000045101
Dynabrade 78423 4-1/2" Dia. x 3/8" Very Fine DynaBrite Surface Conditioning Disc, 25/pack
3M 77558, Cubitron II Hookit Cloth Disc 947A, 77558, 40+ to 120+, 6 in x NH, Die 600Z, 7100232737
Dynabrade 78127 3" Dia. Medium NWN VT DynaBrite Locking-Type Disc, 25/pack
Dynabrade 78182 3" Dia. Medium DynaBrite Locking-Type Disc, 25/pack
Norton 66254497067 - 2" X 1/4" 100 - 150 Grit Medium Grade Aluminum Oxide Vortex Rapid Blend Blue TR Non-Woven Abrasive Disc, 25 Each
Dynabrade 78176 2" Dia. Medium NWN VT DynaBrite TR Locking-Type Disc, 25/pack
3M 11414, Roloc Disc 361F, P120 XF-weight, TR, 1 in, Die R100N, 7000045104
Dynabrade 78424 4-1/2" Dia. x 3/8" Medium DynaBrite Surface Conditioning Disc, 25/pack
Dynabrade 78128 3" Dia. Coarse NWN VT DynaBrite Locking-Type Disc, 25/pack
Norton 66261014897 2" x 1/4" Bear-Tex NEX Rapid Blend AO Medium Grit TR (Type III) Non-Woven Wheel, 60 Each
Dynabrade 90872 2" Dia. Coarse NWN DynaBrite Locking-Type Disc, 25/pack
3M 22397, Roloc Disc 361F, 60 YF-weight, TR, 1-1/2 in x NH, 7000045097
3M 25774, Scotch-Brite Roloc Surface Conditioning Disc, TSM, 1-1/2 in x NH A MED, 7100014112, 200 per case
3M 01326, PSA Cloth Disc 348D, P240 X-weight, 3 in x NH, Die 300V, 7000045069
Dynabrade 92585 3-1/2" Dia. x Medium Hook-Face Surface Conditioning DynaBrite Disc, 10/pack
3M 22404, Roloc Disc 361F, 80 YF-weight, TR, 3 in, Die R300V, 7000045100
3M 14537 Scotch-Brite Surface Conditioning Low Stretch Belt, SC-BL, A/O Medium, 37 in x 60 in, 7100117782
Dynabrade 78122 2" Dia. Medium NWN DynaBrite Locking-Type Disc, 25/pack
Norton 66261014793 - 3" Medium Grade Aluminum Oxide Bear-Tex Speed-Lok High Strength Maroon TR Non-Woven Abrasive Disc, 80 Each
3M 05228 Scotch-Brite Surface Conditioning Belt, SC-BS, A/O Medium, 3-1/2 in x 15-1/2 in, 7000028435
Dynabrade 91163 3/8" W x 13" L 80 Grit A/O DynaCut Belt, 50/pack
Norton 66261014936 3" DIA X 1/8" Thick, Bear-Tex NEX Rapid Blend Quick-Change Type III Non-Woven Unified Wheel, 40 Each
Dynabrade 90875 2" Dia. Super Fine NWN DynaBrite Locking-Type Disc, 25/pack
ACS Diamond Cloth Belt, CX1250 1/2" X 18" 250U
Dynabrade 90353 3-1/2" W x 15-1/2" L 60 Grit A/O DynaCut Belt, 10/ pack
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 24338, Scotch-Brite EXL Deburring Wheel, XL-WL, 8A Medium, 16 in x 1 in x 10 in, 7100074355
Dynabrade 55242 Vane Set (4pk)
Dynabrade 14360 Pneumatic Pipe Belt Finisher
3M 47184, Polyurethane Adhesive Sealant 550FC Fast Cure, White, 350 mL Sausage Pack, 7100197992, 12/Case (Use with 400A-2K APR, Nozzles Not Included) 
