What are your solutions for the leaking roof of an aluminum horse trailer? It has gotten to the point of leaving puddles in the tack room after a heavy rain. Has anyone heard of equine Kool, rain solutions? I don’t know anyone who has used so I’m hesitant.
Interested in these responses too. I bought a new-to-me trailer in the fall and have had nothing but problems with it, including pooling water inside after a rain. It seems to be leaking from everywhere 
After the trailer dealer tried three times to fix my roof leaks and failed, I ended up using EternaBond tape and installing it myself. Haven’t had a leak in the ~2 years since then. It was pretty easy to install, the most annoying part was scraping away the masses of sealant the dealer had dumped on the rivet lines in their attempts to fix it.
You might also think about a quality brand of roof sealer for mobile homes.
Just don’t waste your money on that POS FlexSeal stuff.
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I have tried that garbage in a couple of different forms for a couple of different things — what a complete waste of my money and my time:moneybag:
A friend of mine sealed her roof with Flex Seal and it worked fine. I need to reseal my roof but I’ll take it in and have a professional do it. I do have a leak around the window of the tack room door and end up with the brush boxes directly below the window fill up with water if I leave it out when it rains. Need to get that taken care of.
Something else I didn’t mention because it is not a one person job —— invest in a marine strength canvas to keep the trailer covered during extended periods of non use.
DH spent $150 in 2015 for a marine canvas big enough to cover my 4-horse open stock bumper pull. That is coming up on seven full years of daily exposure to Middle Tennessee’s weather, including gawsh-awful humidity.
The trailer is in the exact condition as when it was first covered and the canvas doesn’t have one iota of rot on it.
Best $150 we spent, although it may cost more by now.
It’s a two person job getting that heavy, cumbersome thing on the trailer but well worth the effort for the protection it provides. We fasten it to the trailer with rubber bungee cords, which we haven’t replaced any of those yet.
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Keeping a trailer covered is absolutely essential to the longevity. I park mine in our shop so it’s under cover all the time when not in use. However, on the rare times I have to leave it out and it rains, there is that leak.
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Sadly, there is no room in DH’s nice big workshop for my poor old horse trailer, so it has to stay covered outside. Funny but not, 
This is what my trailer dealer recommends:
Also, getting the old stuff off is a colossal PITA. Invest in an oscillating saw to help.
