Hobie getaway hull crack
- Rank: Lubber
- Registered: Jul 21, 2016
- Last visit: Sep 07, 2019
- Posts: 41
Posted: Apr 10, 2018 - 11:54 PM
Hello all I’m just wondering if anyone has any experience with sealing or repairing a small hull crack near The crossbeam? I have a small 2-3” Long crack and want to seal it or completely. I have no experience with plastic hulls.
- Rank: Mate
- Registered: Mar 19, 2004
- Last visit: Nov 21, 2024
- Posts: 964
Posted: Apr 11, 2018 - 09:42 AM
Probably a question best asked on the Hobie forum or sent directly to Matt Miller.
Some pictures would also be helpful.
The general consensus is that, since polyethylene is an inert material, there is really nothing that will permanently bond to it so repairing cracks in the hulls is difficult to impossible. I believe some folks have reported having marginally successful results using polyethylene welders or West Systems G-Flex epoxy.
Depending on the location of the crack, generally the best/strongest approach is to "splint" the cracked area back together using mechanical fasteners (screws/bolts/rivets) and a backing plate of some sort, preferrably on the inside of the hull. Seal the crack and the fasteners with silicone caulk or similar when installing the backing plate.
sm
Some pictures would also be helpful.
The general consensus is that, since polyethylene is an inert material, there is really nothing that will permanently bond to it so repairing cracks in the hulls is difficult to impossible. I believe some folks have reported having marginally successful results using polyethylene welders or West Systems G-Flex epoxy.
Depending on the location of the crack, generally the best/strongest approach is to "splint" the cracked area back together using mechanical fasteners (screws/bolts/rivets) and a backing plate of some sort, preferrably on the inside of the hull. Seal the crack and the fasteners with silicone caulk or similar when installing the backing plate.
sm
- Rank: Lubber
- Registered: Jul 21, 2016
- Last visit: Sep 07, 2019
- Posts: 41
Posted: Apr 17, 2018 - 02:34 PM
I’ve seen a couple of YouTube videos of repairs done but I’m not sure how long they will last! The spot where the crack is is not load bearing so I’ll probably just try to cover it and keep an eye on it
- Rank: Mate
- Registered: May 08, 2017
- Last visit: Oct 29, 2019
- Posts: 139
Posted: Apr 17, 2018 - 05:09 PM
I read a post from Matt on Hobie.com that the Wave is cross-linked polyethylene, and that it can't be welded... if you heat it enough to fuse it, it doesn't get gooey... it liquefies and runs. Messy. The upside of cross-linked PE is better impact resistance and surface shine.
I have had a kayak made from linear PE successfully welded, and it works well. I've also patched a Royalex boat (composite material: layers of vinyl, hard ABS, and foam) with epoxy... G-flex epoxy was unavailable at that time. That's what I'd use today, and what I recommend for cross-linked PE -- it sticks to plastic and has some flex. I've read that 'preheating' cross-linked PE makes it easier to stick to (beyond just mechanical roughing up, there's something chemical at work). Google kayak repairs for TONS of info on this... that hobby has been doing this for longer and more often than the Hobie community.
Randii
I have had a kayak made from linear PE successfully welded, and it works well. I've also patched a Royalex boat (composite material: layers of vinyl, hard ABS, and foam) with epoxy... G-flex epoxy was unavailable at that time. That's what I'd use today, and what I recommend for cross-linked PE -- it sticks to plastic and has some flex. I've read that 'preheating' cross-linked PE makes it easier to stick to (beyond just mechanical roughing up, there's something chemical at work). Google kayak repairs for TONS of info on this... that hobby has been doing this for longer and more often than the Hobie community.
Randii