In my case the original rubber type seal had compacted and hardened to such
a degree that it was no longer providing a seal.
I rectified this with 1/2"deep x 1/2" wide foam that comes on a roll and has
a self adesive surface on one side. This is the kind of stuff you use to
seal heating ducts and such like.
After removing the heater unit I applied the foam neatly around the hole in
the bulkhead/firewall and replaced the heater unit still using the original
seal. My problem was solved in a very cost effective way and the repair is
invisible and effective.
Now if you have removed the remains of the original seal I am sure a visit
to a heating and ventilating workshop will yield something similar to the
original seal.
Adrian
TR4A CT64306 O
|