Goop! Electrical 12V DIY question

[stratman34]

Not exactly pedal related.... but I'm working on a prototype circuit for another hobby of mine. I'm building a simple PWM dimmer and control circuit for LEDs.

Now for my question. This will be used in a damp marine environment (but not submerged). I either need to goop the circuit (like I see some pedal builders do), or use a plastic water resistant enclosure. Max I only need 1.5" x 2" x 1" or so... I'm flexible there!

Can someone input on what material the goop is made of and if it is suitable for keeping moisture and salt spray out? Or maybe suggest a place to buy small non-metal enclosures?

[SatelliteAmps]

Most of the time the goop is one of three things, epoxy, silicon, or glue (from a glue gun). My opinion is that you will probably want a marine grade epoxy. Don't use JB Weld though, it contains metal particles and will screw with electricity.

[VacuumVoodoo]

What you need is "conformal coating".
http://www.action-electronics.com/lubricants.htm#Conformal

Fine-L-Kote acrylic or silicon will do nicely. Install your circuit in a hermetic box.

[TED STEVENSON]

Not exactly pedal related.... but I'm working on a prototype circuit for another hobby of mine. I'm building a simple PWM dimmer and control circuit for LEDs.

Now for my question. This will be used in a damp marine environment (but not submerged). I either need to goop the circuit (like I see some pedal builders do), or use a plastic water resistant enclosure. Max I only need 1.5" x 2" x 1" or so... I'm flexible there!

Can someone input on what material the goop is made of and if it is suitable for keeping moisture and salt spray out? Or maybe suggest a place to buy small non-metal enclosures?

Place the circuit in a small plastic enclosure and then pour this in the box.

http://www.mgchemicals.com/products/832frb.html

It's resistant to all sorts of stuff.

[TopBooster]

Hammond Manufacturing (http://www.hammondmfg.com/scpg.htm#plastic) makes quite a few small plastic watertight enclosures.

I buy Hammond enclosures at Mouser (http://www.mouser.com/).