[TowerTalk] Weatherproof Sealant

[Keith Dutson]

Thanks for the many responses both on and off the list.

The consensus answer is:
Use just about any sealant, but non-acid gassing preferred.
Do not seal the box completely, only holes not on the bottom.
Drill a hole in the bottom to drain condensation.
Cover drain with fine mesh screen to eliminate entry by bugs and spiders.

This is now my plan.  Thanks again.

Keith NM5G

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of Keith Dutson
Sent: Tuesday, January 11, 2005 9:18 AM
To: towertalk at contesting.com
Subject: [TowerTalk] Weatherproof Sealant

I need to weatherproof a relay box.  Under test conditions it accumulated an
inch of water in the bottom over a six month period.  What is a specific
brand of silicone sealant recommended?  I understand the kind with vinegar
smell (acetic acid) will corrode electronics components in a sealed
environment.  Also, is there a need to insert a desiccant in the box?

The box is NEMA industrial type, made of plastic with neoprene o-ring seal
on lid.  However, there are many holes drilled for stainless hardware used
to mount the relay and connect wires to the exterior.  The relay itself is
the open contact variety with self-cleaning contacts (hot switch 20 watts
RF), and supposedly impervious to damp conditions.

Thanks for any advice.

Keith NM5G

_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.

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