I'm in a bad situation here... My travel trailer is having water damage issues. It was a mistake to buy this trailer. I'm afraid the only way I could get out of it is to trade it in and sell all my silver in order to buy a travel trailer that is in better condition. ALL of it... I need advice, please.
I'm assuming it is a roof leak. If the trailer is in good enough condition you should repair it with mastic, silicon or a metal patch and sealer.
with bleach in a spray bottle. Wear a face mask, respirator & gloves. What doesn't come off/dissolve, let dry and paint over with "KILLS" paint - 2 or 3 coats until it's not visible. Seal up all seams (roof and wall), around windows, vents and bolt/screws inside and out with silicone sealant. You're going to have to take some stuff apart to get to some areas. Lots of work, but it's cheaper than a new one.
Had an older Gem trailer that was leaking badly in the 90's. after an application of Snow Seal she was good as new. still water tight to this day. much easier to use than silicone because it can be applied with roller or brush and it flows into seams, imperfections, etc.
I'm glad you provided a link as the Snow Seal I relate too is for winter boots and gloves.