Can you seal dental plaster?

[asok]

I just made some parts that I am going to vacuum form next weekend. My old bucks are wearing out, so I made new ones. I have just spent a few hours on them and want to seal them someway to try and make then last longer. Any suggestions?

 

[Draven]

I just made some parts that I am going to vacuum form next weekend. My old bucks are wearing out, so I made new ones. I have just spent a few hours on them and want to seal them someway to try and make then last longer. Any suggestions?

Hi,

You can seal any plaster based casting with a 50:50 mix of white PVA glue and water.

Make sure it's a good mix (just a tad thicker than milk) and try it out on a test piece first to make sure that you like the result.

Basically, it will soak into the cast and leave the glue part of the mixture on the surface.

You'll get a semi-gloss finish but it will be sealed.

It'll dry quite quickly (about 30 minutes), but you can force dry with a hair-dryer if you want to.

Draven

 

[asok]

Where can I get white PVA glue? Never herd of it.

 

[asok]

Any other suggestions?

 

[Larry Young]

Any other suggestions?

When I worked for the orthodontist, we used to seal tooth casts with liquid dish soap.

 

[DarkHeart Armoury]

Where can I get white PVA glue? Never herd of it.

Better known in the States as "Elmer's". It's the white glue used by schoolkids.

 

[asok]

Better known in the States as "Elmer's". It's the white glue used by schoolkids.

Thanks! I am sure that I can find that.

 

[Darth Mule]

Only problem with that is if you are planning on vacuum forming, it will melt the sealant right off. I found this out the hard way when I tried to seal/fill my armor bucks with sculpt or coat.

I'd like to see some vac-form experts weigh in on this. Since the aforementioned mistake, I've often wondered the same thing you are.

 

[Reactor drone]

I've sealed plaster with spraypaint/spray putty,it doesn't seem to be adversely affected by the heat from vacforming.

I've also heard of people sealing with shellac but I haven't used that for vacforming so I don't know how that would be affected.

 

[MattMunson]

Try an ultra thin super glue derivative with a catalyist. A good hobby shop will be able to sell you a few ounces of water thin glue. just spread it over the plaster, kick it with the catalyst, and it'll be rock hard. Do some tests first though!!