How to bond polyurethane

How to bond polyurethane?   Polyurethane (PU) is available in various guises – thermoform or thermoset and comes as a rigid solid, foam or a soft elastomer. It is an easy to bond material but adhesive selection is important to suit the type of PU being bonded.

Cyanoacrylates – All grades adhere well to PU.  Grades such as 2050 and 731 might be considered on elastomeric PU.  If bonding flexible PU contact Permabond about NEW flexible cyanoacrylates.  If bonding foam PU activator such as QFS16 or CSA-NF is recommended.

For bonding rigid PU, two component epoxy, polyurethanes, structural acrylics, and UV curable can be considered.

For flexible bonding solution, look into MS Polymers.

Contact Permabond technical support to determine which adhesive is best for your application.

How to bond polyurethane – Tips for surface preparation & bonding:

1. Providing the surface is clean and dry and free from contamination, PU can be bonded “As Received”.
2. If you do wish to do a solvent wipe before bonding or for clean up afterward, use isopropanol or Permabond Cleaner A; acetone is too aggressive and will attack the plastic.
3. For porous foam PU, select a product with appropriate viscosity. Elastomeric PU may require a flexible adhesive or cyanoacrylate.