When I pulled the a/c unit up off my DRV trailer I found the seal crushed, not reuseable. yes, just 4 lag bolts holding it to the roof. I went to the local truck shop that sold pick up truck camper covers that sit on the pick up truck box and bought a roll of the foam sealer stuff they used to make myself a new gasket. Also bought a tube of sealer caulk. Removed the old gasket, laid out the new foam and it had a sticky side, put that side on the trailer roof. Where any seam was used the caulk to make sure it was a continuous seal so no water could enter. I think the caulk was a weatherseal gasket stuff that was black sold at the auto parkts store. Also didn't have to un-wire the a/c unit, just used a piece of cardboard as a protection to the rubber roof and laid the a/c unit on its side. Total time was maybe 45 minutes for me to fix the leak we had inside the trailer when it rained.
