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 45038, Wheel Adapter Kit No.3, 5/8-11 External, 7000028423
3M 95307, Lead Foil Tape 421, Dark Silver, 3/4 in x 36 yd, 6.3 mil, 7000049079
3M 71361, 641WY 1/4" X 24", 1200 Mesh Diamond Cloth Belt, 7010534916
Dynabrade 95843 Dynabrade Air Lube 10W/NR, 1 Gallon
Dynabrade 11475 Dynabelter Abrasive Belt Tool, Standard Duty
3M 28719, Wheel Adapter Kit 28719, 1 in x 5/8-11 Internal, 7100050705
Dynabrade 15420 Dynafile III Abrasive Belt Tool
Standard Abrasives 712230, Cartridge Roll Mandrel, 1/8 in x 2 in x 1/4 in x 1-1/4 in x 4 in CM-11, 7000121797
3M 22396, Roloc Disc 361F, 36 YF-weight, TR, 1-1/2 in, Die R150S, 7000045091
Dynabrade 64350 26" W x 36" L (660 mm W x 914 mm L) Metal Capture Downdraft Station, 230 V (AC)
3M 22392, Roloc Disc 361F, 24 YF-weight, TR, 3 in, Die R300V, 7000045090
Dynabrade 11486 Dynabelter Accu-Grinder Abrasive Belt Tool, Heavy-Duty
Dynabrade 61420 Raptor Vac Electric Portable Vacuum System
Dynabrade 91428 1/2" W x 12" L 60 Grit A/O DynaCut Belt, 50/pack
Dynabrade 78424 4-1/2" Dia. x 3/8" Medium DynaBrite Surface Conditioning Disc, 25/pack
3M™ 07012, Supplied Air Hose W-9435-100/07012(AAD), 100 ft, 3/8 in ID, Industrial Interchange Fittings, High Pressure, 7000005375, 1 EA/Case
Insize 6143, DEPTH STOP FOR CALIPERS, 6928640371301
3M 11411, Roloc Disc 361F, 50 YF-weight, TR, 1 in, Die R100N, 7000045095
3M 47183, Polyurethane Adhesive Sealant 551, White, 600 mL Sausage Pack, 7100197991, 12/Case 
