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 01480 Vane Set (4pk)
3M 04281 Scotch-Brite Surface Conditioning Belt, SC-BS, A/O Very Fine, 4 in x 132 in, 7010292398
3M 16580, Accuspray ONE Spray Gun System with Standard PPS, 7100099202
Insize 1179-1000, DIGITAL RTJ RING GROOVE CALIPER, inside diameter of RTJ ring groove .6-40"/15-1000mm, outside diameter of RTJ ring groove 1.2-40"/30-1000mm, 6928640394409
3M 36864, Dirt Trap Material Floor Dispenser, 56 in, 7000119908
3M 97979, Hi-Strength 94 ET Cylinder Spray Adhesive, Clear, Large Cylinder (Net Wt 26.2 lb), 7000144615
Dynabrade 53270 7" (180 mm) Dia. Right-Angle Disc Sander
3M 26109, PPS Series 2.0 Adapter, Type S23, 1/4 Female, 18 Thread NPS, 7100135941
3M 26127, PPS Series 2.0 Adapter, Type S31, 1/8 Male, 28 Thread BSP, 7100135953
3M 29611, 641WY 1/4" X 24", 100 Mesh Diamond Cloth Belt, 7010534832
3M 26125, PPS Series 2.0 Adapter, Type S29, 8 mm Male, 1.25 mm Thread, 7100135955
3M 26018, PPS Series 2.0 Adapter, Type S11, 3/8 Male, 18 Thread NPS, 7100135942
Dynabrade 78127 3" Dia. Medium NWN VT DynaBrite Locking-Type Disc, 25/pack
3M 54137, Scotch-Brite, Roloc AL Surface Conditioning Disc TR, 2 in x NH A CRS, 7100075554, 200 per case
3M 25783, Scotch-Weld PUR Applicator Housing/Shroud Assembly Kit, 7000028623
3M 26137, PPS Series 2.0 Adapter, Type S41, Trapezoidal Thread - QCC, 7100135947
3M 26130, PPS Series 2.0 Adapter, Type S35, 16 mm Female, 1.5 mm
Thread Stretched, 7100135926
Dynabrade 11476 Dynabelter Abrasive Belt Tool, Heavy-Duty
Dynabrade 95821 Dynabrade Air Lube 10W/NR, 4oz Bottle
3M 23897, Cloth Belt 777F, 60 YF-weight, 1 in x 18 in, Fabri-lok, Full-flex, 7010307894, 200 per case
3M 16573, Accuspray Air Flow Control Valve, 7000042715
Dynabrade 14010 Dynafile Abrasive Belt Tool Versatility Kit
Standard Abrasives 701149, PSA A/O Disc, 1 in x NH, 240, 7010370103
3M 94717, Cubitron ll Cloth Belt 947A, 80+ X-weight, 1 in x 30 in, Fabri-lok, Single-flex, 7010294445, 200 per case
3M 20928, PSA Cloth Disc 348D, P180 X-weight, 1 in x NH, Die 100N, 7000118917 
