Has anyone ever tried to make a mold with silly putty? I had a brain fat and was playing will the grand daughter, I noticed that the silly putty would hold a shape for a period. I think long enough for a plaster mold to set. Any one try it?
Try it. Let us know!
Chris
Have I ever? NO! Not ever!
The most unusual mold I ever produced was from a rotten bag of redi-mix concrete. Had it laying at the back of the shed for years, and the humidity fused the batch. The useless lump of concrete was discovered when doing a Spring cleaning, and I heaved it into a waste bin. When the bag landed, the paper bag ripped and the contents broke into about 4 large pieces of cement. Where the splits occoured was a great representation of a cliff face, or rock outcroppings. Perfect looking. I put some mold release on the cement, and a little Hydrocal - and voila! The best rock formations ever created in scale!
almo
I will look in my shed, I am sure I have a bag or 2 in there. I might have to wet it down, but still might be cheaper in the long run.[bow]
That bag was at the back of my unheated shed for probably five years at least. With all the freeze/thaw that can happen on the west coast, I guess it was just the right conditions. Let us know if you give it a try and let’s see the results. My layout that had the formations was dismantled some time ago, and nothing to compare it to. I suggest maybe leaving the bag of concrete in the elements for a few rain storms so that it’s completely saturated with water a couple of times, and allow it to dry fully.
You could also head to some construction sites to look for some “slump test” concrete. Wherever a slab is being poured, a test sample that determines how the water/cement/sand ratio is is usually thrown aside, to later be removed or covered. You might not have to use your own cement!
almo