Marine Goop

Hello folks,

Finally,after all the busy weekends this summer. I had a nice time putting in some
hours on my new kayak. I gooped down my modified pool noodle thing for my
transducer. While waiting to dry, I decided to also work on my milk crate modification. I'll be sending the pictures soon after a figure out how to. Anyways,
I was reading the back of the marine goop tube. I read that the goop should not
be use on polyethylene which is the same material that my kayak is made of. I
guess it is to late being that I had already gooped the pool noodle thing down. I
am not sure but, are most kayak made with this same material or not? Just wondering because I want to do it right. Can anybody enlighten me here so I can
rest assure I did it right?

Thanks in advance,
Jed

Marine goop works great, but requires patience, it dries very slowly.

Nothing sticks to polyethylene very well, which is why they make the disclaimer.  However, of all the adhesives, Goop works the best.  I would not use it for anything that requires structural strength.  Rough up the area with sand paper and de-grease it with acetone.  Then apply Goop with a weight or clamp.

Nothing sticks to polyethylene very well, which is why they make the disclaimer.

Not true anymore.  Mr. Sticky makes some stuff that bonds like mad! Check it out...

That's a good video.  Seems to me that the surface prep is the most important part.  I'd bet the epoxy isn't anything too special.

For any adhesive situation, creating a "water break free" surface is key to achieving maximum bond strength.  On most materials, scuffing with gray scotchbrite or steel wool can create that type of surface.  I never realized that heat treatment can create a water break free surface on PE.  Good tip, and I'd bet that even things like marine goop will adhere much much better with that heat treatment.

EK

TTTTT TAP! TAP... TAP PLASTICS!!

I'd bet the epoxy isn't anything too special.

I have heard just the opposite, but that's just hearsay. I was going to play around with some of that stuff this winter though and see how bomber it really is.

I bought a couple of tubes of that stuff (poly bond) and experimented with it on scrap.  I had unsatisfactory results, where the bonds were not strong.  I didn't have a video at the time, but I followed the protocols with the torch and all that.

Either I didn't do it right, or there is something different about the kayak poly.  Probably was me.

Thanks to all for the feedback. I appreciate it greatly. I just hope what I did holds
up for at least a few trips before I have to do over.

Thanks again,
Jed

I'll remember that Tap stuff if I ever get a big ding in my yak and need to glue it up.
   If you glued a foam doughnut down with marine Goop (or Plumber's Goop, which I bet is the same stuff) and you roughed up the poly and cleaned it with something (I used denatured alcohol, but acetone might be better), I think you'll be pleased that it holds a long time - mine has lasted a couple of years.  I tried just Gooping the transducer down twice before the doughnut invention, and both times is came loose enough to give poor readings within a few months.  I think it's the flexibility  of the foam that keeps it from pulling away from the Goop.  And I wouldn't worry about it affecting the poly - when I peeled the Goop off using heat and a putty knife, it hadn't affected the poly.