Electronics Forum | Thu Feb 25 07:37:42 EST 2010 | pcbrown
We are using Humiseal 1B31 and polyester dots for masking. We are spraying this in a Binks sprayer mixed at almost 1:1 with 521 thinner. Whe are seeing the coating creating thin halos around the poly dots as if the dots are "rejecting" the coating. T
Electronics Forum | Wed May 07 09:31:28 EDT 2003 | davef
We use uV Dymax glue for thermocouple attach sometimes, but don't like the remainder [anal] and loosing attach, sometimes. Roger Saunders, President Saunders Technology, Inc; said: PRO: � These products are easier to use than high temperature solde
Electronics Forum | Thu Feb 17 15:01:23 EST 2005 | davef
We're not familiar with your DYMAX #984-LVUF. The problem is not with your conformal coating. The problem is with your 0805 [and not all of 0805, probably just those from a specific supplier]. This lack of coverage of components is called dewetting
Electronics Forum | Mon Jan 29 20:25:54 EST 2001 | davef
I know you're talking Humiseal, but this may help http://www.loctite.com/electronics/elec_tech_index.html Conformal Coatings (PDF Documents) "Conformal Coating Overview" (Lester D. Bennington, Senior Development Chemist and David Crossan, Manager
Electronics Forum | Thu Jun 10 21:09:17 EDT 1999 | Samuel F.
Humiseal probably won't work as most of them are solvent based or require pretty high temp cures. MicroCoat technologies manufacturers UV cure epoxy conformal coating materials that have been used to coat just about anythin (except the green fog) Cal
Electronics Forum | Wed Aug 27 17:12:34 EDT 2008 | mikesewell
Silicone contamination could appear as fisheyes or dark spots under UV light. 1A33 can be heat cured but is a single component oxygen cure coating - it needs a source of oxygen to cure. An unvented oven may slow or limit the cure. Check out the TDS
Electronics Forum | Wed Jun 03 12:02:42 EDT 2009 | joeherz
Greetings, We have a potential job coming up that would require coating with a silicone material (Humiseal 1C51 or equivalent). The volume will be high (in the 1000s/day). This is a low complexity, small card about 2.5" square in a 6up array. Onl
Electronics Forum | Fri Jan 22 14:31:14 EST 1999 | Dave F
| I have boards coated with Humiseal 1B73. At a late point mfg. site we need to remove a series of 0603 resistors for optioning purposes. I have been trying to determine the fastest, easiest way to re-coat the pads after removal. Drying time of the c
Electronics Forum | Mon Jan 29 11:52:55 EST 2001 | blnorman
We have been using a VOC-free, no-clean flux on our boards that we conformally coat with no problems. We're using both a UV cured and a heat cured Silicone conformal coating. One thing to beware of is inhibition in the silicone. We found that out t
Electronics Forum | Mon Jul 27 13:41:56 EDT 1998 | Chris Fontaine
Steve, We do a lot of hand spray conformal coating and have had much success. We have had much experience with Humiseal 1A20 Urethane. Acrylics are easier to work with but may not stand up to your environment. I don't have any experience with sili
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