SIKA AP Products 017-90915 Sikaflex-252, White

This did take a few hours to set up properly and I wouldn't touch it for at least 24 hours but we use this to connect our L brackets from solar panels to the roof of our fiberglass travel trailer and this worked like a charm, far better than VHB on the same surface. 10/10!

Used this to install solar panels on my van roof 3 years ago. Panels are still holding strong after being in the snow and extreme heat of Arizona. Stands up to using a power washer to blast debris from the channels under the panels too. No sign of degradation. Got another tube to install a new panel and was pleasantly surprised to get a metal tube! I did have issues with the plastic tube bursting during application cuz this adhesive is very thick

Used to mount solar panels on camper roof. Holds as good as a screw would but no need for additional holes in the roof!

I did not notice when I received the product. Now, a month later, I discover there is no nozzle in the bag when I opened it. It appears this a common problem with this product. I will have to kludge up my nozzle. The adhesive better work.

Worked great on solar panel install on my TPO RV roof. I did make sure the surface was properly cleaned, prepped and 3 days of curing at 60-80 degree F temps before hitting the road with my RV. Put 1700 miles on them at interstate highway speeds in windy conditions and so far, so good! The stuff is thick so a good heavy duty caulk gun is recommended. Another caution is have your work prepared properly. I found out the hard way that once i started the tube, even though put a nail in the end and taped it up, it still set up in the tube so i had to start a new tube. Plan you work properly because it is pricey.

I use this to glue flexible solar panels to RV roofs. Knowing that the product is somewhat hard to extrude and having multiple panels to glue, I've used powered caulk gun. Unfortunately, the tube contents were very hard likely because being close to expiry (less than month left) or improper storage... The tube leaked lot more of its contents into my caulk gun rail and gears than to actual surface I was applying it to, basically ruining my new caulk gun. That being said, unlike with other products (that have completely detached during a rainstorm) the solar panels have withstood two Arizona summers, lots of rain without any sign of detaching.

After only a couple of summers, this stuff crumbled and cracked on the roof of my RV. It might be good for sealing inside, or between panels, but avoid using it where directly exposed to weather. Now I'm redoing the solar install with the "correct" self leveling lap sealant.

Works Great, as advertised.