I am potting some hallsensors in a simple mold using Resin body filler, anybody know of something simple that acts well as a release agent, something around the shop or home or can be picked up from a local store, (obtained quickly?)
Al.

Carnuba or parafin wax.

The best thing to use for polyester is a product called PartAll. It smells just like the origonal Crayola Crayons before they made them all politically correct.

Carnuba car wax (pure - like "California Gold") would work fine. This is what I use for molding Urethanes.

Scott

Carnuba or parafin wax.
Carnuba car wax (pure - like "California Gold") would work fine. This is what I use for molding Urethanes.
Scott

Thanks, I guess the car will have to go without this week-end :)
Al.

For what its worth - the wax brands that have cleaners in them do not release as well.

Also - if it's a new, fresh mold, wax it three to five times before using it the first time, then just a quick wax in between parts.

And watch out not to mix the filler too 'hot' - the exotherms can get pretty hot in thicker sections - hot enough to melt stuff and catch things on fire! For small parts you likely won't have issues.

Report back when you mold! Pics would be nice, too.....

:wave:

Scott

Help me pleazzz !
Can some one help me to find out where/ how i can put here some treads . (i know it's stupid but i just cant find it ..
Greetz

Not sure what you are looking for? Find a Forum and post your question whatever!:confused:
Al.

For what its worth - the wax brands that have cleaners in them do not release as well.
Also - if it's a new, fresh mold, wax it three to five times before using it the first time, then just a quick wax in between parts.
And watch out not to mix the filler too 'hot' - the exotherms can get pretty hot in thicker sections - hot enough to melt stuff and catch things on fire! For small parts you likely won't have issues.

Report back when you mold! Pics would be nice, too.....


They are very small, and do not have to be pretty :)
They are buried in a water velocity sensor below dams, about 150ft down.
Al.

depending on what your doing a fine layer of vasaline should work

They are buried in a water velocity sensor below dams, about 150ft down.
Al.

Polyester and water don't get along really well, Al. Are you sure this will work?

Or are you saying your mold will be Bondo, not the parts? <= this is likely the answer.....

What about using a potting epoxy? Something like ChockFast Orange? (this would be a good potting compound for extreme environments, by the way)

Scott

Polyester and water don't get along really well, Al. Are you sure this will work?



They are to be installed into present watertight units, they are a conversion from electro/mechanical to electronic.
These things are built like a swiss watch, believe me! (fabriqué en France).
Al.

Al,
I have partall and also mould release wax but I also have used a hardwood floor paste wax. Apply a coat, buff and coat it 3 or 4 times it will work well. I did quite a bit of molding with it before I found the proper stuff.
The automotive wax is a waste of time as far as I am concerned.
John

OK I have a few options, time to experiment this week end.
Thanks
Al.

OK I have a few options, time to experiment this week end.
Thanks
Al.Dear Al,

In my VVHO, mxtras is right on the button. Forget polyester resin. Epoxy potting compound is the way to go. For mould release use a light silicone aerosol spray, or just pot the whole shebang in a potting mould and forget about trying to release it.

Just my two cents...

Best wishes

Martin

Eh!!AL
I agree with John the car wax maybe a waste of time.Hardwood floor wax such as Johnsons works well.Silicone works but results in sillycone contamination.Nothing will ever stick to it again.When yer at your local Canadian Tire,buy ordinary body filler,not light weight,not UV cure.Sorry don't remember the name but it is probably the cheapest.
BTW Al,you are at 6000 informative posts.
Larry

BTW Al,you are at 6000 informative posts.
Larry

Thanks :)

I am doing some preliminary tests as we speak, I will report back over the week-end.
These things are not much bigger than a thumbnail x .2"
Al.