hyd. oil works good also . I use a roller and do it once year. got 20 yr out of one trailer and still good
I hauled a small tractor with a broken hydraulic line on it for a neighbor. It leaked all over my flatbed so I went ahead and used it on the entire deck. It still looks good and was about 15 years ago. I have never touched it up but the trailer is stored in the barn so it is seldom outside in the elements.
