Seam sealers

["jonmac" <jonmac@ndirect.co.uk>]

Brad,
For your info (and anyone else in the same situation) Sealastic was (is?) a
gungy black sealing compound which I think had quite a lot of ground rubber
in it. Very effective but probably the filthiest of things to work with
that has yet been contrived by man!
John Macartney
Now in the same museum as the cars he sold when they were new