Potting Compounds available in the UK

Hello,

Just wondering what's available in the UK off the shelf as far as
electronic encapsulation goes?

I've been using this from Maplin's although it's incredibly viscous and
quite wasteful when doing small runs;
http://www.maplin.co.uk/Search.aspx?criteria=AZ90X&doy=search&source=15
Is perhaps quite expensive too.

It's being used to encase these things;
http://www.retro.dial.pipex.com/pest/pest_029/images/image1.jpg

Have done some Googling and most of the companies out there will refer
you to distributers, eg. Maplin's. , or want to sell in vast quantities.

Ideally I'd be looking for something like a 1kg rub of resin, and a
syringe of hardner. Something which could be used as and when, perhaps
with a shelf life of 6 months or so. I used to do die assembly when
temping during the summer a few years back and we had this single
solution syringe resin which had to be stored in a freezer and was
highly toxic.

Any ideas??

Thanks,

Aly

 

Bondo?

;-)

 

Loads of stuff. Depends on why you want to pot as to which you choose.

RS and Farnell used to have a respectable range of potting compounds.

 

The Black stuff is highly effective and seems just as happy filling buried
power cable splicing boxes as small electronic casings but is mucho
expensive. Smaller packets even more so.
As an aside, I've not seen mentioned here the use of 'Brown foam'. It's a 2
pack polyurethane mix used by boat builders to fill buoyancy compartments.
Nice thing is it's very cheap and hence can be used to fill or pot just
about any volume.
Just mix up a few spoons-full and pour in. Be sure to screw the lid down
very quickly!.
regards
john

 

polyurethane resin as used in making fibreglass composiite. (like
canoes, surfboards, and fibreglass circuit boards...)

it's a syrupy liquid resin and watery hardener
costs about as much as house paint in similar quantities,
lasts about as long on the shelf.
moderately toxic I think - store away from foodstuffs, use with ventilation.

probably not as good at thermal transfer as some other products
is that an issue?

Try "fibreglassing supplies" in the yellow pages.

Bye.
Jasen

 

Fibreglass, mmmm, might check that out actually. Thanks

 

<smiles> will check that out too It can't be any worse than the
black resin finding it's way through every 0.1mm gap. Ended up
adding blu-tac to my last shopping list ;-)

 

I reside not in the sceptered isle but FWIW I use ordinary
%100 silicone door and window sealant, AKA caulk, available from the
local hardware store. Takes time to cure all the way through, but it
skins over quick. I don't know how well the stuff conducts heat.