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 66039, Push-Ins Probed Test Plugs 393-2015-50, with Grip Rings, 50 EA/Case, 7000148552
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 33780, 641WY 1/4" X 24", 400 Mesh Diamond Cloth Belt, 7010534915
Dynabrade 22092 2-3/4" x 17" Hand Sanding Block
3M 71361, 641WY 1/4" X 24", 1200 Mesh Diamond Cloth Belt, 7010534916
3M 33349, 641WY 1/4" X 24", 220 Mesh Diamond Cloth Belt, 7010534919
3M 53914, Performance Plus Duct Tape 8979N Nuclear Red, 48 mm x 54.8 m 12.1 mil, 7000049014, 24/ case
3M 22396, Roloc Disc 361F, 36 YF-weight, TR, 1-1/2 in, Die R150S, 7000045091
3M™ 72010, Replacement Filter Kit 523-01-29, 7000056891, 1 EA/Case
3M 20927, PSA Cloth Disc 348D, P240 X-weight, 1 in x NH, Die 100N, 7000118918
3M 26580, Accuspray ONE Spray Gun System with PPS Series 2.0 Spray Cup System, 7100163226
3M 22395, Roloc Disc 361F, 60 YF-weight, TR, 3 in, Die R300V, 7000045098
Dynabrade 78122 2" Dia. Medium NWN DynaBrite Locking-Type Disc, 25/pack
3M DP16, Scotch-Brite Driving Pad, 16 in , White, 7000126477
3M™ 72013, Adapter 529-04-50, 110-120 VAC, 7000131705, 1 EA/Case
3M 76783, Cubitron II Hookit Cloth Disc 784F, 120+ XF-weight, 5 in x NH, Die 500X, 7100222757
3M™ 17379, Versaflo™ Length Adjusting Breathing Tube BT-30, 7100009685, 1 EA/Case
3M 62813, Adhesive Sealant 740 UV, Gray, 290 mL Cartridge, 7100111087, 12 per case
Dynabrade 95842 Dynabrade Air Lube 10W/NR, 1 Pint
3M 16023, PPS Cup & Collar, Large, 7000000642
3M 51034, Roloc Disc 361F, P100 YF-weight, TSM, 2 in, Die RS200PM, 7000119020
3M 11418, Roloc Disc 361F, P240 XF-weight, TR, 3 in, Die R300V, 7000045106
3M 62819, Adhesive Sealant 760 UV, Gray, 290 mL Cartridge, 7100097767, 12/Case 
