Creates Flexible Seals on Expansion Joints
3M™ Polyurethane Construction Sealant 525 is a single-component, moisture-curing polyurethane sealant used to seal construction expansion joints. It can seal a wide variety of materials, including plastics, fiberglass reinforced plastic (FRP), sheet molding compound (SMC), aluminum, steel, coated metal and wood. It creates a strong, permanent elastic bond with elongation of over 800%. It will seal a wide selection of materials, including concrete, wood, PVC and metal. This adhesive will perform in temperatures ranging from -22?F/-40?C to 176?F/80?C. Once skin has formed, this sealant can be painted to improve the final finish. Available in cartridges, sausage packs and bulk format to meet your application needs.
Recommended Applications
- Sealing expansion joints
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 62606, Scotch-Weld Threadlocker TL42, Blue, 50 mL Bottle, 7100039193, 10/case
3M 50216, Temflex Cotton Friction Tape 1755, 3/4 in x 82-1/2 ft, Black, 7010297809
3M 03027, Scotch General Purpose Cloth Duct Tape 393, Silver, 48 mm x 54.8 m, 12 mil, 7000048964
ACS Diamond Cloth Belt, CX1250 3/8" X 24" 75U
3M 93947, Scotch Stucco Tape 3260-A, 1.88 in x 60 yd (48 mm x 54.8 m), Stucco Tape, 7010384961
3M 62607, Scotch-Weld Threadlocker TL42, Blue, 250 mL Bottle, 7100039192, 2/case
3M 43474, Glass Cloth Tape 3615, White, 1 in x 36 yd, 7 mil, 7000048876
3M 97841, Value Duct Tape 1900, Silver, 1.88 in x 60 yd, 5.8 mil, 7010375734
3M 07591, Outdoor Masking Poly Tape 5903, Red, 5 in x 60 yd, 7.5 mil, 7010334725
3M 64070, Contractor Grade Pro Strength Duct Tape 3979, Silver, 1.88 in x 60 yd, 7010375912
3M 34786, 663FC, 3/4" X 90", 70u, Diamond Trizact Belts 7100063667
3M 95723, Scotch Automotive Cloth Tape 06980, Olive, 50.8 mm x 18.2 m, 7010312582
3M 63738, Contractor Grade Multi-Use Duct Tape 2979, Silver, 1.88 in x 60 yd, 7010335692
3M 49830, Multi-Purpose Duct Tape 3900, Red, 48 mm x 54.8 m, 8.1 mil, 7000144749
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 13767, Scotch-Brite EXL Unitized Wheel, XL-UW, 8A Coarse, 3 in x 1/2 in x 1/4 in, 7010365791
3M 50022, Venture Tape Xtreme Cloth Duct Tape 1557, Black, 48 mm x 55 m (1.88 in x 60.1 yd), 7010378552
3M 53915, Performance Plus Duct Tape 8979N (Nuclear), Red, 72 mm x 54.8 m, 12.1 mil, 7010334653
3M 01668, Green Corps Stikit Production Disc Dust Free, 6 in, 36, 7010295229, 100 discs per carton
3M 01490, Stikit Gold Disc Roll, 8 in, P150, 7010292229, 125 discs per roll
3M 05182, Scotch-Brite Cut and Polish Wheel, CP-WL, 5A Fine, 6 in x 1/2 in x 1 in, 7100050403,Box of 4
3M 16615, Accuspray Atomizing Head, Blue, 1.2 mm, 7100086837 (4 Nozzle/Kit)
3M 50018, Venture Tape Metallized Cloth Duct Tape 1502, Silver, 48 mm x 55 m (1.88 in x 60.1 yd), 7010337385
3M 85652, Thermosetable Glass Cloth Tape 3650, White, 4 in x 60 yd, 8.3 mil, 7010373472
3M 49833, Multi-Purpose Duct Tape 3900, Black, 48 mm x 54.8 m, 7.7 mil, 7000148383
3M 22397, Roloc Disc 361F, 60 YF-weight, TR, 1-1/2 in x NH, 7000045097
3M 98514, Premium Matte Cloth (Gaffers) Tape GT2, Black, 48 mm x 50 m, 11 mil, 7010336132
3M 50019, Venture Tape Metallized Cloth Duct Tape 1502, Silver, 72 mm x 55 m (2.83 in x 60.1 yd), 7010296281
3M 14643, Scotch-Weld Metal Bonder Acrylic Adhesive DP8407NS, Gray, 490 mLDuo-Pak, 7100179480, 6/case
3M 36880, Self-Stick Liquid Protection Fabric, Blue, 36 in x 300 ft, 7100169352
3M 95307, Lead Foil Tape 421, Dark Silver, 3/4 in x 36 yd, 6.3 mil, 7000049079
3M 16162, PTFE Glass Cloth Tape 5453, Brown, 2 in x 36 yd, 8.2 mil, 7000144794
3M Scotchkote Liquid Epoxy Coating Spray System HSS Mix Nozzle,Straight, 7000031879
3M 06970, Scotch Polyethylene Coated Cloth Tape 390, Olive, 48 mm x 54.8 m, 11.7 mil, 7000048963
3M 50013, Venture Tape Cloth Duct Tape 1500, Silver, 72 mm x 55 m (2.83 in x 60.1 yd), 7010337384
3M 36882, Self-Stick Liquid Protection Fabric, Blue, 56 in x 300 ft, 7100169350
3M 92057, Vinyl Duct Tape 3903, Yellow, 3 in x 50 yd, 6.5 mil, 7010378167
3M 85653, Thermosetable Glass Cloth Tape 3650, White, 5 in x 60 yd, 8.3 mil, 7010334203
3M 06728, Premium Plastic Sheeting with 233+ Masking Tape (36 mm), 16
ft x 400 ft, 7100139893
3M 37853, Dirt Trap Protection Material, Gray, 56 in x 300 ft, 7100132344
3M 22407, Roloc Disc 361F, 80 YF-weight, TR, 1-1/2 in, Die R150S, 7000045099
3M 45714, Cubitron II Hookit Cloth Disc 947A, 120+ X-weight, 3 in x NH, D/F 3HL, Die 300BE, 7100113113
3M 62817, Adhesive Sealant 760 UV, Black, 290 mL Cartridge, 7100139449, 12/Case
3M 62819, Adhesive Sealant 760 UV, Gray, 290 mL Cartridge, 7100097767, 12/Case
3M 77558, Cubitron II Hookit Cloth Disc 947A, 77558, 40+ to 120+, 6 in x NH, Die 600Z, 7100232737
3M 80516, Disc Pad Face Plate Ribbed 80516, 7 in Medium Gray, 7000120515 
