3M™ Polyurethane Construction Sealant 525

  • Options available
  • | Select product options for IDs.

Multi-purpose bonding and long lasting seals

Permanently elastic to allow joint movement

Creates flexible seals on expansion joints

View more details
Frequently viewed resources
Tech Data Sheet (0B)


  • Multi-purpose bonding and long lasting seals
  • Permanently elastic to allow joint movement
  • Creates flexible seals on expansion joints
  • Skin time in 90-150 minutes; paintable once skin forms

3M™ Polyurethane Construction Sealant 525 is a single-component, moisture-curing, gap-filling elastomeric sealant that creates permanently elastic seals and bonds well to concrete. Skin time in 90-150 minutes.

cartridge, sausage pack and bulk formats
Available in cartridge, sausage pack and in bulk format
Creates Flexible Seals on Expansion Joints
3M™ Polyurethane Construction Sealant 525 (PDF, 371.52 Kb) 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

manual applicator
3M Manual Applicator
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.

pheumatic applicator
Choose a 3M Pneumatic Applicator for ergonomic applications
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.

Click here for more information on 3M™ Adhesive Sealants. (PDF, 797.43 Kb)

Typical properties



Ask a 3M Expert

For industrial/occupational use only. Not for consumer sale or use.

3M industrial and occupational products are intended, labeled, and packaged for sale to trained industrial and occupational customers for workplace use.  Unless specifically stated otherwise on the applicable product packaging or literature, these products are not intended, labeled, or packaged for sale to or use by consumers (e.g., for home, personal, primary or secondary school, recreational/sporting, or other uses not described in the applicable product packaging or literature), and must be selected and used in compliance with applicable health and safety regulations and standards (e.g., U.S. OSHA, ANSI), as well as all product literature, user instructions, warnings, and other limitations, and the user must take any action required under any recall, field action, or other product use notice.  Misuse of 3M industrial and occupational products may result in injury, sickness, death, or property damage.  For help with product selection and use, consult your on-site safety professional, industrial hygienist, or other subject matter expert.