There was a recent thread on the MG Enthusiasts BBS (MGB Technical) regarding
difficulties dealing with rubber sill covers, and the owner's eventual success.
Here's what worked for one MGB owner:
" I've got the goods to share so everyone can learn from my mistake! First, I
cleaned the back of the mats with acetone. Then I used 3M "Super Trim Adhesive"
to make the bond. I bought this at an automotive body shop supply house. It
worked fantastic. Be sure to follow the instructions on the can."
As I recall (the original thread has rolled off to the archives), cleaning the
back of the rubber with acetone was what finally turned the trick. It also
removed whatever adhesive he tried at first.
> David et al,
> This evening I tried 3M Contact Trim Adhesive to glue the sill covers on. I
> followed the instructions (on the can-no instructions came with the Moss sill
> covers either) AND weighted the lot down a board, anvil, and metal shot dive
> weights. This did not work either. The sills were very clean and I wiped the
> sills and sill covers down with water yesterday and let everything dry until
> this evening. Does anyone have another suggestion, or better yet; has anyone
> SUCCESSFULLY done this job? Maybe this is why the 67 has carpeted sill
> covers:-(. Monte