Here are some specific polyurethane glues that are recommended for repairing canvas:
* Gorilla Glue Polyurethane Adhesive
* Loctite PL Premium Polyurethane Construction Adhesive
* 3M 5200 Marine Adhesive
*DAP Weldwood Contact Cement
* Scotch Hi-Strength Contact Cement
To use polyurethane glue, first clean and dry the surfaces to be bonded. Then, apply the glue to one surface and press the two surfaces together. Hold them together for a few minutes until the glue has set.
Polyurethane glues can be messy, so it is important to wear gloves and eye protection when using them. Be sure to also work in a well-ventilated area.
If you are repairing a large area of canvas, you may want to use a spreader or brush to apply the glue. This will help to ensure that the glue is applied evenly.
Once the glue has dried, you can use a knife or scissors to trim away any excess glue.