It is probably neoprene then. Neoprene good, rubber bad according to everything I've read. There were strips of neoprene stuck to the bottom of my 1974 20' SF tank when I took it out last year also, original tank built in 1973 stamped on it. The place that built my tank gave me 1/4" x 2" neoprene to put under the tank and also welded doubled up aluminum strips to keep it even further off the bottom of the tank coffin.
Last edited by Normagain; 07-06-2013 at 09:30 AM.
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