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10-28-2023, 11:03 AM
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#1
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Senior Member
Join Date: Jun 2016
Location: State of
Posts: 454
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Eternabond strength
This is not a Jayco or even RV question per se. I have an older Yakima Rocketbox that has a split in the top half near a hinge. I'm trying to figure a way to salvage it as new ones are expensive. I have tried an epoxy solution that just cracked along the same line. It may be that I end up needing some kind of fiberglass repair kit, but before buying one, I thought I might use some Eternabond tape inside and out to act as both a repair and sealer for the crack. Am I crazy to hope it will be strong enough?
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2016 19RD Elite - Thermal
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10-28-2023, 11:10 AM
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#2
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Senior Member
Join Date: Aug 2014
Location: Alberta
Posts: 783
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Unsure of the pressure acting on the split, but Eternabond is quite strong. It is a tape though so not invincible. I have used it on a leak I had on a previous fifth wheel roof and it stayed put for years.
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10-28-2023, 11:15 AM
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#3
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Site Team
Join Date: Apr 2012
Location: Newark, NY
Posts: 16,770
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I would have to see it, but I'd consider pieces of fiberglass mat or cloth on both the inside and outside of the crack, along with JB Weld. A layer of JB, the cloth, and another layer of JB on top. I'd do one side at a time, and give it a coat of semigloss black paint to finish.
If it's made of plastic, there are plastic welding kits on Amazon that may do a good job too.
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10-28-2023, 11:45 AM
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#4
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Senior Member
Join Date: Jun 2016
Location: State of
Posts: 454
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Actually I tried JB weld by itself already and that didn't work at all. But it's not the best use case for that product.
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2016 19RD Elite - Thermal
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10-28-2023, 01:30 PM
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#5
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Senior Member
Join Date: Nov 2011
Location: Where ever the boss says we're going.
Posts: 17,573
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Eternabond will loosen if stretched, so if that is a possibility it would not be a good solution.
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10-28-2023, 01:33 PM
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#6
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Member
Join Date: Jun 2022
Location: Reno
Posts: 54
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ABS cement has worked well on rocketbox repairs I've done. I put Gorilla tape (strong duct tape) on the inside after giving the cement time to cure.
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10-28-2023, 06:21 PM
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#7
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Senior Member
Join Date: Jul 2023
Location: Millen, Georgia
Posts: 686
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If it is fiberglass, just get one of the fiberglass repair kits from Amazon. They are pretty easy to use . I used one to repair a crack in a kayak. By the time you experiment with things that end up not working, you could have already fiberglassed it. Be sure to get a pair of scissors that can cut fiberglass.
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Dwaynebmsg
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10-28-2023, 06:23 PM
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#8
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Member
Join Date: Jun 2022
Location: Reno
Posts: 54
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I don't think any of Yakima's Rocketboxes were ever fiberglass. Packasport is the only company that I know that has done a fiberglass roof box.
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10-28-2023, 06:40 PM
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#9
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Senior Member
Join Date: Jul 2023
Location: Millen, Georgia
Posts: 686
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Dwaynebmsg
08 Seneca 36 MS
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10-31-2023, 08:36 PM
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#10
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Senior Member
Join Date: Nov 2021
Location: Troy
Posts: 1,956
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The best way to fix cracked plastic is to weld it. I have welded several plastic parts and it doesn’t recrack. I use my soldering iron.
If you need to see the video I learned from, let me know and I will try to find it for you.
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11-01-2023, 09:00 AM
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#11
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Senior Member
Join Date: May 2012
Location: Minnesota
Posts: 10,093
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Quote:
Originally Posted by Kevin Cooper
The best way to fix cracked plastic is to weld it. I have welded several plastic parts and it doesn’t recrack. I use my soldering iron.
If you need to see the video I learned from, let me know and I will try to find it for you.
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X2 You can buy a plastic welding kit on Amazon.
How I do it is apply metal duct tape to the visible side to align the panel and hold it all together. Plastic weld the back side. Then remove the tape, apply new tape to the backside to give some support. Then plastic weld the front side.
There is plastic welder stapler option if you need additional support.
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11-04-2023, 02:33 PM
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#12
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Member
Join Date: Jul 2023
Location: Montrose
Posts: 67
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I used to sell Eternabond at a commercial roofing distributor. Unless the shell is completely split in half from end to end, it will probably work for a while if you tape both the outside and inside. Make sure you use the cover tape and not the in-seam tape. If it is completely split into two separate pieces it will not work.
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11-04-2023, 03:20 PM
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#13
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Senior Member
Join Date: Jul 2016
Location: Mapleton
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I don't know about how well it would work on hard plastic but was very pleased that after 3 years my son's pool cover tarp repairs are still holding up in perfect condition. The tarp is a very robust material that mice chewed holes in during summer storage. We used two pieces of Etearnabond and patched on both sides with an almost 2 inch hole in the middle of the patches. No sign of failure after freeze, thaw, stretching and storage in a shed during the summer. Maybe the glue meeting in the middle has helped as the bond is very good.
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11-05-2023, 07:47 AM
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#14
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Senior Member
Join Date: Jun 2016
Location: State of
Posts: 454
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Some great tips here thanks for all the replies! I used a Bondo fiberglass repair kit and though it's ugly as heck, it seems like it will be plenty strong. I'll have to do a little cutting of the excess fabric but otherwise I'm pretty please. I'm not concerned at all about looks lol. I'll remember these plastic welding tips too that might come in handy.
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2016 19RD Elite - Thermal
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02-09-2024, 08:14 PM
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#15
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Senior Member
Join Date: Jun 2016
Location: State of
Posts: 454
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another follow up
attached pic of the ugly but strong fiberglass patch.
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