Thanks Larry. I will experiment a little, I bought a glue gun from Home
Depot and I will try to just put a bead of glue on some inconspicuous
place, and see how it will hold up. If it does not, I will try some
plastic weldong. The boat is supersafe because it is full of styrofoam
inside, I think, and I need it to boat on several small lakes
nearby.

A glue gun will not work. You have to melt the polypropolene.
Larry Hill

A glue gun will not work. You have to melt the polypropolene.
Larry Hill

A local vendor showed me a technique for installing fittings into plastic
holding tanks.
It's called "spin welding", and it sounds really complex until you see that it
simply involves cutting a hole and then,literally, spinning the new fitting at
a high speed until the plastic melts and bonds together.

hiya
Im a plastics engineer by trade and yes you are correct almost no glue will
adhere to HDPE or PP (polypropolene) do you know which one it is ? I once
saw topper dingies being moulded on 6000 ton machines and i think they were
PP.
Anyway, welding is the way to go, epoxy is just silly. Most good auto
bodyshops have plastic welding gear for the repair of car bumpers (
fenders ) most car bumpers are ABS though so they may have to order in some
filler rod to do your job , Just ask

fragged

"Ignoramus32317" wrote in message
...
In addition to my 21 ft boat, I recently found a 4x8 plastic boat that
someone put out as garbage. It is kind of doublehulled and seems to be
made of high density polyethylene (HDPE), like plastic buckets. I am
delighted because I can use this boat on some little lakes nearby.

It seems super safe (double hull) and super stable.

It does have however a few small cracks in the hull that need
repair. What is the right way to repair HDPE? Can I use glue guns with
hot melt glue?

i