28" Width x 50' Length - Easy to apply self-adhesive bottom board. Permanent, waterproof, strong and unaffected by cold temperatures. Woven polyethylene film meeting all requirements for use as bottom board. Repairs holes, cuts and tears resulting from plumbing repairs, weak seams and damage by animals. Cut the right patch size and peel off release liner.
This item ships via: UPS Ground, 3 Day Select, 2nd Day Air or Next Day Air
Our Goal is to deliver your purchase in the quickest and most economical way possible. Shipping service and costs are determined by product, weight, package size and ship to destination.
To view shipping rates prior to checkout, add the product(s) to the shopping cart. On the My Cart page, click "calculate shipping rates", when the popup appears, enter your state and zip code and click update. The services available for the entire order will appear with the actual cost.
Estimated Arrival Date
- USPS: 3-7 business days after ship date
- UPS Ground: 3-7 business days after ship date
- UPS 3 Day Select: 3 business days after the ship date. Example: If your order is shipped on Monday, your package will arrive on Thursday.
- UPS 2nd Day Air: 2 business days after the ship date. Example: If your order is shipped on Monday, your package will arrive on Wednesday.
- UPS Next Day Air: The next business day after the ship date.
- LTL Freight: 5-7 business days after the ship date.
Order Tracking: In most cases you will receive shipment notification via email. You can also track your order online. For assistance contact us.
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View all 74 reviews
BY Treva I from Boise ID on May 31st, 2019
I didn't know where or how to fix the floor. So glad I saw an advertisement online
Very Sticky-hard to handle
BY Theresa from pottstown,pa on October 13th, 2018
This product although seemed to be able to seal the bottom of the trailer, was extremely sticky and very hard to handle never having done this before.
BY Pat H from Wentworth, NH on November 29th, 2017
This is an amazing product. Be sure to start and adhere just the edge to start. It will stick to itself quite easily. I highly recommend this product.
BY Tom D from Allentown pa on November 11th, 2015
This product works like a charm! Delivery was spot on.
BY Tate from Seattle Wa on April 24th, 2015
Found a dead cat under my new home.. (Just Follow your nose!). He must have went down fighting cause he tore the heck out of the underboard first. Used this stuff to cover a couple big holes and a long tears. This stuff really sticks. My buddy got his hair stuck to it and we had to cut him off it so be careful!
BY C P from Murphy, NC on May 31st, 2013
We bought a used MH and had a lot of holes to patch underneath in the bottom board fabric. I am in my 60s and using the adhesive spray really bothered me so I ordered the adhesive backed, self-sticking Flex-Mend fabric. This stuff is great! No spraying on the glue while you're underneath the MH so I didn't need to wear a mask (which fogs up my glasses - lol). Just cut the size patch you need to cover your hole, peal off the backing about 3 inches at a time sticking it on where you need it. When you have pulled off all the backing rub your fingers over the entire patch to stick it on good. It's just like sticking on contact paper. That's it - so easy! To be sure my patches stuck and that I wouldn't need to go under the MH again I put heat on my patches for about 2-3 mins with a blow dryer (one that you use to dry your hair) after I had stuck my patches onto the bottom board fabric. You may not need to add heat to the self-sticking Flex-Mend but I could see that putting heat on my patches seemed to make them stick better. BTW, I am a female ;-) Hope this review helps.
BY Max L. from Selah, Washington on March 5th, 2013
We followed the instructions and cleaned existing bottom board then applied the flex-mend it went on very easily and sticks very well. Next test will be to see if it lasts. So far so good.
BY howard from cana,va on November 8th, 2012
Great product to seal bottom board after working on water lines or tears.
My underboard looks new again!
BY Barb from Des Moines, IA on October 3rd, 2012
I had damages from animals to fix under my new home and thought I had to install a new underboard. Boy was this a time and money saver. It was wide enough to cover the holes torn by the critters and makes my underboard look nice.
Q: How well does it stick to the under belly on older mobile homes and temps below 50 degrees?
A: Should work fine, we have never had any complaints about this product.