You have to cut a v groove from the front having some support from the backside to hold the loose sides level and you have to heat up the filler rod not the material you are welding.
Diy plastic welding rods.
For the less weld informed a good solid weld involves more than melting and fusing metals the weld zone needs to be free of oxygen otherwise the normal oxidation of metals that leads to rust patinas and discoloration happens at a dizzyingly rapid rate.
To use the test try to pick a rod that most closely resembles the plastic.
The best hdpe welding rod i ve found so far is the tear away ring that comes on 5 gallon paint and drywall mud buckets.
Heat the end of the rod like you normally would in welding to attach it to a clean spot on the plastic.
My grandparents have some ocean kayaks they use on a river and the bottoms.
He had learned about it in a video from the awesome fran blanche she of frantone guitar pedals fame.
And a welding rod which must be made of the same plastic you want to repair.
However all the diy welders i ve seen assume that you have access to welding rod.
I still haven t tried the technique myself with my dremel tool but it couldn t be easier.
Use a welding rod testing kit if you re not sure what kind of plastic you have.
Use the degreaser and spray it onto the plastic.
Plastic welding gun welding rods same type of plastic as welding degreaser 80 grit sandpaper 120 grit sandpaper tape step one clean plastic before you begin to weld any piece of plastic you want to clean it off of any debris grime grease or resin from the factory.
Several years ago make.