Underbelly tape

[geotex1]

Flex of the coroplast slit couldn't have been an issue as the trailer was parked and never moved between the time of the tape application and when it fell off by itself. The tape I used for the main repair was indeed 4" wide mobile home tape.

Thanks for the replies. I'll guess I'll buy some more tape and clean again with alcohol and try again.

Also do your best to avoid taping it on a humid day.

I can only speculate some combination of your cleaning with mineral spirits and stale tapes. The all-weather Gorilla Tape is a butyl tape, which is the general kind of tape that sticks "best" to polyolefins. I'm not familiar with that brand of mobile home tape, but the better tapes are polyethylene or polypropylene slit-film scrim with butyl-based adhesive.

[gbkims]

There was mention of a different type of coroplast being put on a 2021 Solitude and when asked, GD said to use eternabond on it.
The coroplast had dimpled circular patterns on the surface.

[8088.r0]

A couple weeks ago I repaired a lousy job the dealer did taping up the underbelly after they worked on the black tank dump valve.

I cleaned the coroplast with a rag and mineral spirits and then again with another rag and alcohol. I used this

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

and on a smaller slit done for my disc brake conversion I used gorilla tape.

I came back to the trailer a week later and the both the gorilla tape and the underbelly tape had completely fallen off.

What's the secret to getting tape to stick to the underbelly.

I’ve had success using RV roof repair and flex-all repair tapes. Both are several inches wide and have excellent cohesion to a multitude of materials including the corrugated underbelly covering underneath my Solitude.

Good luck.

[8088.r0]

Although I named flex-all as the brand name for a tape I’ve used, the correct brand name is flex seal. My bad.

[WestTexasRanger]

Absolutely the best tape for this is the ZIP tape used in residential & commercial wall construction. Other than ZIP being printed every 12” on the tape, I have no complaints about it’s durability and adhesion. I repaired the underbelly on a friends travel trailer 7 years ago and it’s still in perfect condition. I wouldn’t use it where it would be exposed to the sun for an extended period of time. UV rays will do a number on it in 10-12 months.

[Carolinaskiffer]

I used survey lathes and wood screws, make a frame and walla you have an access if you ever need to get back in.

[north channel novels]

Had the same problem with a dealer's tape repair job coming undone after they made an incision to correct a tank valve issue. Considering all the road contamination and in my case, diesel exhaust residue, I thoroughly cleaned the surface with acetone. Surprisingly, the dealer's tape, re-used, stuck nicely, but I reinforced it with Gorilla tape. After a conversation with the dealership, I understand they use acetone now too. After a subsequent repair there following a recall notice, the dealer's initial repair on that incision is holding up just fine.

[Cowboy1]

I think things might have gone south with the mineral spirits. It's almost impossible to get all of it off - even with alcohol. I've cleaned the Coroplast with just alcohol and the mobile home underbelly repair tape was still holding well three years later.

Rob

I used rubbing alcohol too to clean (I believe that is what they recommend) - has held very well.

[fez111]

In 2018 I had to fix a couple of "openings" in the Coroplast under our Solitude. Lowes sell the same material (white only) in 3 x 4 foot sheets, more or less. To patch a hole when I relocated my battery vent I cut a square piece and after cleaning I used shower and bath silicone to stick it on, then used furnace duct screws (1/4 inch x 1/2 hex head) to hold it all together until the silicone set. Nobody can see it down there anyway.
I later closed a seam using bigger pieces. Not one of these repairs has failed...yet!

[tcfulmer]

I had to access the underside of a different brand of trailer a few years ago. I cut a three sided opening leaving the fourth side as a natural hinge in the colorplast. Then used some scraps of treated fence boards to create a frame around the opening so that I could screw the flap shut.