sgimbel
Member
How warm does it have to be to cast PR with no Vac or pressure pot? Thanks in advance.
using PR
- Thread starter sgimbel
- Start date
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Phunky_2003
Member
I used silmar last week. In my shop it was about 50 or so. I did preheat the resin.
Craftdiggity
Member
I wouldn't work with it in less than 50 degrees. I takes forever to cure in the cold. I like to work in 65 -75 degrees, normal room temp for me.
NewLondon88
Local Chapter Leader
My shop might be 80 .. or it might be 40. I can cast in either one, but
warmer is better.
I also warm the molds and the resin. Put the resin in a jar and let that sit
in a hot bath. It will get watery as it warms. I pop the molds in the toaster
oven for about 15 minutes. If they're both warm, it won't matter much
what temp the shop is .. that resin will set pretty fast.
I also have a radiator in the back corner of the shop. I have a sheet of
Corian on top of it and I'll put the filled molds there. (make sure you level!)
and turn a box upside down over the mold. That holds in heat AND fumes.
warmer is better.
I also warm the molds and the resin. Put the resin in a jar and let that sit
in a hot bath. It will get watery as it warms. I pop the molds in the toaster
oven for about 15 minutes. If they're both warm, it won't matter much
what temp the shop is .. that resin will set pretty fast.
I also have a radiator in the back corner of the shop. I have a sheet of
Corian on top of it and I'll put the filled molds there. (make sure you level!)
and turn a box upside down over the mold. That holds in heat AND fumes.
Curly
Member
If your question refers to heating the resin to thin the viscosity. Hot from the tap works for us.
Pete
DurocShark
Member
I won't try anything below 20*F.
kevrob
Member
Well, I am newbie to working with PR, but I have worked with it all winter long so far even thought it has been under 20 degrees F on some days in the garage/shop. I will pour it, tint it, then place in hot water (from the tap) for a bit to thin. Then, once I am ready, I will add the MEKP, pour it into molds and place it in the toaster over (set to around 140 degrees). Haven't had any issues so far and have had no problems turning.
DurocShark
Member
That's definitely a workaround. I do most of my casting in pipe molds, so the toaster oven is out until the resin kicks. Below 20 I can't get it to kick at all, it just gets gummy.
kevrob
Member
Ya, I used to use pipe molds and would have never even tried it with those at low temps. Now that I have one of PTownSubbie Silicone Molds, i have no problems with them in the oven and can cast all winter long for the cost of my $20 walmart toaster oven!