"frank1492" wrote
Here is the problem. Airmar specifically states that epoxy,
or the previously recommended Boatlife LIfe Seal or 3M 4200
are *not* to be used. Only GE Silicone II is allowed!

Frank,

Some plastics are affected by the solvents that are used in various
adhesives and sealants. They can cause rapid cracking - Not sure which
plastic they are using, but it sounds like they have had problems with
several types of adhesive (Just read their installation instructions which
are very good):

http://www.airmartechnology.com/uplo.../17-217-01.pdf

I would heed their advice (unless they offer alternatives - try phoning
them). Make sure you use a marine grade silicone such as:

http://makeashorterlink.com/?O40D32A7D

When you install the unit, put a healthy bead on the bottom edge as they
suggest and let it cure for 24hrs. Then, add a fillet of same product about
1/2" x 1/2" or larger all round for support. Make sure you get all oil
removed from surface - If it is in the bilge area, oil may be absorbed into
the surface - a light sanding with fine paper may help after first
thoroughly degreasing.

By the way, oil or gel is better than glycol especially on a power boat
because they do not form bubbles when agitated.

Good Luck!

GBM