Acrylic spray turning white

[RetiredJake]

I have been trying to use a clear acrylic. Spray to seal stamps/decals prior to casting. Lately, the acrylic has been getting a whitening to it after I pour. Any ideas?

Thanks,
Jake

 

[Dustygoose]

How long are you letting them De-gas? I use Modge Podge and let it De-gas 48 hrs minimum. So far so good

 

[RetiredJake]

I have been letting the acrylic sit 24 hours. That is what the directions state for a full cure.

Jake

 

[Ed McDonnell]

Depending on the temp, humidity, number of coats, total thickness of what you applied, it could take longer. In South Florida in the summer I found 72 hours is a lot safer. YMMV.

Ed

 

[Dustygoose]

Do you put in an oven to harden them up? Or just let them cure with 3-4 drops per oz?

 

[RetiredJake]

Do you put in an oven to harden them up? Or just let them cure with 3-4 drops per oz?

I have tried it both ways, same result.

Jake

 

[SDB777]

Another user of ModPodge....and depending on temp/humidity/and 'my available time', I usually do between 30hrs to as many as a full week before pouring. Average is 48hrs though....




Scott (was the paint on the tube dry too) B

 

[Dustygoose]

I have seen Scott's blanks and he pours lots more than me. I had a feather blank do the same to me. 72hrs de-gas but I post cured in toaster. I think that's what did it. The rest I just let cure in 24 hrs or so