PlusRocRV Underbelly Material RV Underbelly Tape Waterproof Flex Belly Tape with Permanent Sealing Adhesive for Mobile Home, Camper Travel Trailer, Tear Repair Patch(6'' x 20')

This stuff works like a champ. It can repair the underbelly material of an RV like nobody's business. I have an RV and Toy Hauler and this is all I used to do the repairs I had to do on the underbelly. Basically the material for an RV underbelly cover is like a 4-6mil tarp material that is very strong and durable. Because it is not normally exposed to direct sunlight it can last a long time but sometimes they can ripped because of running over a very high rock, or a stick pokes up in there and tears it, or perhaps you had to do some mods or fixes to your RV and you had to get in under the floor and cut your way up from the outside. This stuff is almost the exact same material and it is sticky as hell. Here is how to make work like a champ:Pro-tip:1. First, prep the surface. This is really basic stuff and we all know that you should prep the surface and we all get lazy from time to time, but the complaints about it not sticking are obviously bad prep jobs or people who didn't prep at all. Clean off any dirt with a sponge or the like and let it dry. Then give it a quick shot of denatured alcohol to make the surface pristine. Let the alcohol dry for a minute or two and put this stuff on and it will stick like it was meant to and it will never come off.2. Tape from both the inside and the outside if you can. When I was doing floor repairs I had access to both sides and taped both sides and the tear is now stronger than the rest of the underbelly material because it's doubled up and because I prepped, it is never coming off.3. Get more than you think you'll need, it goes quick. I ran through more than I expected doing repairs and ran out. You must go well past the tear on each side to get the best strength so be sure to order enough.4. You can use a little heat to make the material soft to pull it together if the rip has been there a long time and is really wide open. Prep the surface, use a heat gun and soften up the material, pull it together and slap this stuff on and bang, high and tight again.5. Finally, if you have a big hole that is missing a bunch of material, put in a some backing screen or the like. Tape the screen over the big hole really well with the screen on the inside if you can. Then tape the outside and inside covering the screen entirely with a layer on both sides. This will keep the integrity of the material and you won't have any leaks and it won't come out if you do it right.Last tip: You can use this on tarps by using the same prepping procedure and the same times and it works absolutely flawless.

Worked great to fix the underside of my camper that was damaged by a blown tire. Used spray foam to fill where insulation came out and then taped over with this product. Worked great and had great adhesive strength. Looks good and appears waterproof if taped correctly. Watch out, it will gum up your scissors, nothing some mineral spirits didn’t fix easy.

Had to close up an opening in the underbelly after a tank valve repair. I bought the 6" wide, a bit wide for this use, I now would buy the 3" or 4".This stuff has very aggressive adhesive to stick well. But, better adhesion is made through preparation.1. Wash down the surface with warm soapy water, then rinse we'll with a wet rag.2. Wipe down the area with isopropyl alcohol, let dry for 5 minutes.3. Apply the tape.5. Warm the tape with a hair dryer or heat gun, press the tape down while warm.This is the best tape I have used for this purpose, all the others fall off after a few days/weeks. This has held up with no peeling.

This works great for adding insulation to the underside of our trailer. For curves and angles, a little warming from a heat gun softens the material so that it can be shaped. Once it cools, it holds the shape.The extra special, super expensive tape fell off the next day. Don't bother with it.

Very sticky, and works great on the camper repair we are working on.

Very satisfied. Blends nicely with textured black under wrap. Works extremely well to seal cuts/splits in the vinyl underbelly of a mobile home, R/V, vapor barrier, and house wrap. It is VERY sticky, and somewhat of a challenge to unroll or reposition once applied. It works best if you first clean the application area with 70% (or stronger) isopropyl alcohol and remove all remaining residue with a clean cloth or paper towel. Keep the alcohol on hand to remove adhesive residue from the scissors or whatever tool used to cut the tape as you go. When working alone, don't cut a piece longer than 4' to prevent the adhesive side from coming in contact with itself.

Five stars for the usability . But a bit over priced . But it gets the job done

I won’t buy this tape again, because the adhesive on the tape will not adhere to corrugated plastic.I made some extensive repairs to the corrugated plastic under a travel trailer that was only three months old. I cleaned the area with isopropyl alcohol but, a week after applying the tape, most of it had come loose. This happened while the trailer was parked—I imagine that wind from traveling would have ripped it all off.To solve the problem I zip-tied the coroplast seams together and applied spray contact adhesive to both the plastic and tape. After several months, and several hundred miles of travel, all the tape is still in place.Edited 1week later: After posting the review above, the seller gave me a full refund, which I appreciate.