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How to Repair a Kayak with a Nitrogen Plastic Welder


An extreme impact with a sharp rock or other
obstacle might make a crack in your kayak. For example, the bottom of this kayak has
a crack that goes all the way through to the other side. This video will show you how to repair this
type of crack using a nitrogen plastic welder. First, place some aluminum tape on the inside
of the kayak to cover the crack, if you can reach it. This will prevent the welding rod from flowing
through the crack. Next, grind a v-groove into the crack using
a die grinder. Rough up the plastic on both sides of the
v-groove. Blow or wipe off any loose plastic pieces. Most kayaks are made out of polyethylene,
either high density or low density. Either type of rod will work when repairing
polyethylene. Choose which type of rod you would like to
work with, and pick the color that most closely matches the color of the kayak. Before welding, make sure the nitrogen flow on your welder is set between 11 and 13 liters per minute. Use your nitrogen welder to heat the kayak
and the welding rod at the same time. Press the rod into the v-groove and apply gentle downward pressure on the rod to melt it into the kayak. Keep the flow of nitrogen aimed just in front
of where the rod meets the kayak. This will ensure the two plastics fuse together. Make an even stroke with the airless plastic
welder to smooth the weld. Cut a piece of stainless steel reinforcing
mesh to fit the damaged area. Align the mesh over the top of the weld. Use the nitrogen welder to heat the weld and the mesh. Use a screwdriver or other tool to embed the
mesh deep into the plastic. There may be some spots where the mesh didn’t
get embedded well. You can use the airless plastic welder to
heat these spots and then press the mesh in. Lay another pass of welding rod on top of
the reinforcing mesh. Make another even stroke with the airless
plastic welder to smooth the weld. Go back with the airless plastic welder and
smooth the rod into the plastic. If any pieces of mesh pop up, heat the area
and push the mesh deeper into the kayak, then cover the area with the melted rod. Allow the weld to cool before moving on to
the next step. Remove the aluminum tape from the inside of
the kayak. Grind a v-groove along the crack line, just
as you did before. Weld one pass of polyethylene welding rod
along the v-groove. Smooth the welding rod into the kayak plastic. The kayak repair is finished. Now you can get back into the water without
fear of sinking! Thanks for watching! Make sure you subscribe to our channel and
hit the bell to be notified when we post a new video. Let us know in the comments what you thought
of this repair, and check out our other videos for more plastic repair tutorials.

Bernard Jenkins

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