Creates Flexible Seals on Expansion Joints
3Mâ„¢ 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 86992, Diamond Disc, 3" Roloc, 674W, 120 Mesh, TR, 7100143477, Box of 5
Dynabrade 13509 Dynastraight Finishing Tool, Rear Exhaust, 6,000 RPM, 5/8" (16 mm) or 1" (25 mm) Dia. Arbor
3M 11411, Roloc Disc 361F, 50 YF-weight, TR, 1 in, Die R100N, 7000045095
3M 24049, Wetordry Cloth Disc 281W, P1000 YF-weight, 8 in x NH, Die 800JM, 7000045052
Dynabrade 64404 36" W x 60" L (914 mm W x 1,524 mm L) Metal Capture Downdraft Table, 230 V (AC), Side Exhaust
ACS Diamond Cloth Belt, CX1250 5/8" X 120" 125U
3M 62614, Scotch-Weld Threadlocker TL71, Red, 250 mL Bottle, 7100039230, 2/case
3M 01326, PSA Cloth Disc 348D, P240 X-weight, 3 in x NH, Die 300V, 7000045069
3M 08025, Adhesive Sealant 740 UV, Black, 600 mL Sausage Pack, 7100057385, 12/Case
3M 51003, Surface Protection Fabric 14 in x 50 ft, 7100223608
3M 26618, Accuspray Atomizing Head Refill Pack for 3M PPS Series 2.0,Clear, 1.8 mm, 7100141416 (4 Nozzles/Kit)
3M 47183, Polyurethane Adhesive Sealant 551, White, 600 mL Sausage Pack, 7100197991, 12/Case 
