I have repaired a crack in my Coleman Ram X canoe using a plastic welder.
Here's a link you may find interesting.
https://goneoutdoors.com/repair-plas...e-6390299.html
Quote:"Scrub the exterior surface of the canoe surrounding the hole with soap and water.
Wipe down the surface with a commercially available plastic surface cleaner. These are commonly composed of a mixture of naptha and petroleum distillates and removes wax, grease and slick mold release agents from molded polyethylene structures.
Cut a piece of wire mesh material large enough to cover the hole or split and overlap the edges by approximately 1 inch.
Melt the wire mesh into the surface of the canoe around all edges of the hole with the plastic welder. Allow it to cool.
Cut a piece of supplied polyethylene filler rod sufficient to cover the hole or split and overlap the edges by approximately 1 inch.
Pre-melt one end of the filler rod material with the plastic welder. Flip the rod over and apply the melted side to the repair area.
Apply the head of the plastic welder to the filler and melt it into the wire mesh already in the surface. Spread the melted filler out using flat surface of the plastic welder. Cut off additional segments of filler rod and melt and spread them to cover the entire area. Make sure the canoe surface and the melted filler plastic get hot enough that they thoroughly melt together.
Continue melting and applying filler rod until the entire repair area is covered."
This system worked well on my Coleman. I picked up a plastic welder at Princess Auto $79.99.
https://www.princessauto.com/en/plas...t/PA0008699134
Good Luck
Phil