Background: http://vintageairstream.com/FAQ/FAQ_5.html#Floor Penetrating Epoxy: http://www.fgci.com/ Also a question, Floors up to 1968 were all 5/8" Plywood. Are you saying that your 1970 is 3/4"? I've been meaning to find this out so as to make a new FAQ. Anyone else have any data points on floor thickness on 1969 & later Airstreams? RJ