×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Moisture barrier coating

Moisture barrier coating

Moisture barrier coating

(OP)
Could anyone suggest a spray coating that will seal small electronic boxes 2" x3" x4" size having rf connectors.
We have a part with hot/cold temp and altitude cycling in an environmental chamber, and don't want moisture sucked inside which may change the part performance. The parts are really simple purchase vendor rf parts.
These small RF boxes are a fairly tight fit in general, but I'll like to add a spray or dip sealant to add an extra measure of moisture penetration resistance.

I realize hermetic seals are the optimum, but they would be expensive and hopefully there's a routine to heat the part to remove moisture, then seal with spray coat XYZ routine.

Thanks,
kch

RE: Moisture barrier coating

You can buy spray conformal coat at your local electronics supply store.  Fry's and Orvacs in Fullerton, CA carry the product.

TTFN



RE: Moisture barrier coating

(OP)
I have some of that from a local store.
Is that used as a good moisture seal? It's pretty thin so it flows under circuits and I thought it was mostly to prevent short circuits. I was trying some out recently and thought it might flow inside my housing and maybe not really seal the unit. My unknowing brain thought maybe a thicker coating of some paint on material, then maybe a parylene topcoat. I was hoping someone maybe just went through this and had some environmental results.

Thoughts?
kch

RE: Moisture barrier coating

I'll have to check the can I have at home.

TTFN



Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources