On my '40 I used Weldwood contact adhesive, got it at Home Depot. A tip, don't apply more than 2-3 inches of width for the full lenght of the board starting at the inside edge. Once you get the inside edge firmly attached and straight you may go ahead and glue the rest of the rubber to the board. I used paint stir sticks to keep the two parts from touching until I was ready for it...someone else suggested using waxed paper for this, then sliding the paper out as you go. I also recommend priming both sides of the boards with an automotive quality two part epoxy primer. Let the primer set one day before glueing the rubber on. Another suggestion is to be careful and not strech the rubber as you glue the two pieces together...if you strech you may end up with too much cover and/or crooked covers. Good luck, Buford.