Please Help - Casting Resins

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mitchm

mitchm

Member
Joined
Apr 25, 2008
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636
Location
Johannesburg, Gauteng, South Africa.
I have managed to find a casting product in SA called Pratli-Mold. The instructions say that moisture will cause bubbles/foaming and must be avoided.

Is this also true for PR or Alumilite or both?? The color is cream and I will need to color it with some non water based product, maybe powder pigments.
 
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I see now that you actually get two cans of A and one of B.

It's not exactly like alumilite, but if you can get it cheaply locally, it's probably worth a look.
 
Yes, alumilite foams very well when moisture is added. Use the wrong kind of paint and you can easily get 4x the volume of resin you pour; sadly all full of bubbles.
 
Phil Hansen said:
Howzit Mitch,
Can you tell where? I have been looking around and have not come up with much, especially pigments. There must be somebody here that does have them.
Thanks Phil in KZN
Click to expand...

Phil, its a Pratley product. You need to search for a company doing "COMPOSITES" in KZN. Good Luck!!!! I have been searching for months, tried a few, but nothing that turns and colours nice as yet!
 
Eventually found out that this is a urethane based resin using a hardener very similar to that used with Alumilite. The mix ratio is 2:1.

The color of the resin mixed is a dark ivory, any ideas on where to start to color the mix, red blue, green etc........or do I just add alot of 1 powder pigment???
 
Hi Mitch,
Went to PMB this morning to Glassfibre Products. They carry the same stuff as Harveys Composites.
Got some clear casting resin (MEK hardner) and 2 pigments (paste not powdered).
Now comes play time. Sure the first lot will not be that good.
Harveys are looking into powdered luster pigments for me to try - not one of their stock items.
They also suggested I use a white filler instead of the white pigment as it makes the casting less brittle.
They have a branch in Jetpark closer to you.
HTH
 
Mike, it sounds like a product that most of us are unfamiliar with. When that happens, the best way to know for sure is just to try various ways to color it and make sure you keep notes as to what the weights/volumes are for the additives.
 
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