When I bought my 1998 Lance 990 legend last February with the notion I was only going to keep it for 1 year. It was far from perfect but had good bones, clean inside and everything worked!! Also most importantly the DW liked it. Bought it for only $3000 bucks!! There were a couple of previous small leaks in cab over. The side of cab over where the lance front strut mount bracket ripped out with previous owner and the infamous cab over front window... I resealed the whole TC wherever it could be sealed with PRO FLEX brush able sealer!! This stuff is hands down to me the best stuff for and older TC. Look this stuff up. No leaks at all this past year and TC has been threw a lot of heavy rain on the road and camping!! I brushed the cab over window and every window, nook, seam, and cranny with the Pro flex sealer and it is one durable tough sealer!! I might just keep the TC now and DW and will also buy a Fifth wheel/motorhome and have best of both worlds. Good Luck.
The 2 small cans are the brush able sealer. Comes in clear and white colors. Only concern is to use in a well ventilated place or outdoors and a mask. Has a very strong odor. I will not use caulk again on this camper.