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.

Insize 7262-200, OUTSIDE SPRING CALIPER, 8", 6928640319679
3M 66328, Sanding Belt 9250NA-2 , 2.5 in x 16 in, Fine, 120 grit, 7010369251, 2 per pack, 10 packs per case
3M 26125, PPS Series 2.0 Adapter, Type S29, 8 mm Male, 1.25 mm Thread, 7100135955
Dynabrade 49440 3" Dia. Angle-Head Rotary Buffer, .4 hp, 3,200 RPM, Rear Exhaust, 1/4"-20 Male Thread
Dynabrade 64350 26" W x 36" L (660 mm W x 914 mm L) Metal Capture Downdraft Station, 230 V (AC)
Air Turbine Tools 230DM - 6mm Straight Hand Tool Series, 25,000 RPM, 32723
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Dynabrade 14000 Dynafile Abrasive Belt Tool
Dynabrade 59038 5" Dia. Self-Generated Vacuum Dynorbital-Spirit Random Orbital Sander, 3/32" Orbit
3M™ 17379, Versaflo™ Length Adjusting Breathing Tube BT-30, 7100009685, 1 EA/Case
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Dynabrade 56850 5" Dia. Non-Vacuum Dynorbital Supreme Random Orbital Sander, 3/32" Orbit
Dynabrade 14360 Pneumatic Pipe Belt Finisher
Dynabrade 96101 Dynabrade Air Lube 10W/NR 24 Per Box
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