|Subject:||Re: [TowerTalk] Weatherproof Sealant|
|From:||W0UN -- John Brosnahan <email@example.com>|
|Date:||Tue, 11 Jan 2005 10:17:23 -0600|
Professionals doing outdoor enclosures KNOW that you CAN'T seal a box. You MUST let it breathe and drain. Best to give it a good umbrella and drain holes for condensation.
When I sold my company to Vaisala, OY, a large maker of environmental sensing devices -- weather stations, radiosondes, etc -- they agreed that they NEVER try to seal an outside enclosure.
Temperature changes cause it to breathe air in and out. With time and more temperature changes, the humidity condenses and never goes out unless given a way to drain. (Unless you do a full MIL-SPEC hermetically-sealed enclosure.)
At 09:17 AM 1/11/2005, Keith Dutson wrote:
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?
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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