Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Newmar Owner's Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 08-06-2020, 06:41 AM   #15
Senior Member
Hit_the_Rhod's Avatar
Join Date: Oct 2014
Location: Port Orchard, WA
Posts: 4,195
Best solution is to replace the tank, BUT, if you cannot do that, and plan to go ahead with the repair, I suggest you do the following. Purchase a roll of stainless steel wire, Aviation Safety wire is my recommendation, .020" thickness,

drill small holes on each side of the crack, especially on the bottom of the tank where stress of loaded tank may cause the tank to "flex" rendering the epoxy useless as the load would be in shear with the epoxy bond to the tank. "lace" the safety wire through the hold, like you would if sewing two pieces of fabric together, in and out along the crack, side to side, pulling tight after each wrap. When finished "lacing up" the crack, follow through with your epoxy to seal the crack, the safety wire, and the holes your safety wire laces through.

The weak point here is finding an epoxy/sealant that will bond to the tank. Another suggestion I would make is to use marine 5200 sealant instead of the epoxy over the "laced" repair. Will stay pliable, withstand flexing, and since the tension forces attempting to pull the crack apart will be taken up by the safety wire, you don't have need for great strength.
Keep us appraised of your progress please
Scot & Laura Kellersberger, U.S. Army (ret)
Newmar 4 wheel drive Dutch Star 3891, SOLD
Now RV'ing on the water in a Trawler!
Hit_the_Rhod is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free! RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 08-06-2020, 04:22 PM   #16
Join Date: Jan 2020
Posts: 51
Hey, thanks for the input! I had thought about trying to mechanically fasten the 2 sides together, to prevent fatigue failure, but I don't really have room on the bottom side to reach in to pull a wire through. It sits flat on a sheet of plywood, so I hope that the shear load would be absorbed by that. To distribute the forces along the crack, I had planned on using fiberglass drywall tape under the epoxy, but in reading your comment, I might try to find something stronger, like the pet proof screen door material, and use like a 6" strip. While I would love for this to permanently repair this, I'm REALLY hoping to get through this season with it. I'll keep the pics and updates coming.
2001 Dutch Star 4095, Spartan Chassis, 350 Cummins
Rescued from a salvage auction
jimknoll is offline   Reply With Quote
Old 08-06-2020, 07:30 PM   #17
Senior Member
Join Date: Aug 2011
Location: Enjoying the Western States!
Posts: 17,749
Originally Posted by jimknoll View Post
The inside is not nearly as smooth / slippery as one might hope, they may be when new, but there was a buildup of chemicals over the whole surface.
That's why the only thing we ever used was just water and plenty of it.
Full-timed for 16 Years . . .
Traveled 8 yr in a 2004 Newmar Dutch Star 40' Diesel
& 8 yr in a 33' Travel Supreme 5th wheel
twogypsies is online now   Reply With Quote
Old 08-15-2020, 08:32 AM   #18
Join Date: Jan 2020
Posts: 51
So far, so good.

Well, structural repairs to the floor and wall of the tank are working, at least after the first 500 mi. I only siliconed and screwed the access panel on the end of the tank, so I can inspect the repairs when we get back.

I used marine tech- flex set epoxy as the primary repair. It's like $25 for a small 2 tube kit, so I used 2 of them to penatrate the crack, and cover a 12" wide strip of fiberglass screen. After curing,I tested it for leaks, and everything was tight and dry. The instructions for use with HDPE are very specific. You have flame treat the area just prior to applying the epoxy. I hope that I got that part right. I still wanted more of a liner to cover a bigger area, so out comes the 3M 5200. It's never failed me yet, so I spread a generous layer of it over as much of the floor as I could reach with a short board as a trowel.
To close it up, I will epoxy and screw the white PVC trim in place, then epoxy and screw the panel back in. Currently it's just temporary sealed against leaking for this trip.
Attached Thumbnails
Click image for larger version

Name:	20200812_192308.jpg
Views:	21
Size:	328.6 KB
ID:	297232   Click image for larger version

Name:	20200812_193048.jpg
Views:	20
Size:	237.9 KB
ID:	297233  

2001 Dutch Star 4095, Spartan Chassis, 350 Cummins
Rescued from a salvage auction
jimknoll is offline   Reply With Quote

black tank, rally, tank

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Well, well, well. No surprises with this story concerning Camping World. Jpcoleman Entegra Owner's Forum 2 02-12-2019 11:47 AM
Crack crack and more cracks Jl95501 General Discussion 20 02-08-2019 11:43 AM
haste makes waste (literally) frazierdee General Discussion 8 01-01-2013 04:55 PM
Well, well, well .. I have mices. fredaevans Class A Motorhome Discussions 8 06-17-2012 08:57 PM

» Featured Campgrounds

Reviews provided by

All times are GMT -6. The time now is 06:25 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2023, vBulletin Solutions, Inc.