It depends on a few things including the shape and a draft angle for releasing easily from the concrete. Generally speaking the more careful you are the longer they last.
With raw foam usually you can get 5 casts or so. With epoxy coated foam you could get 15 or more. Small breaks in the epoxy can be patched with more epoxy to extend longevity as well.
We used our Styropoxy which comes in 15 or 60 min working time - both are "high build". There's a 45 min "very high build" that goes on like peanut butter and is very sand-able.
Some use our standard Styropoxy and auto body filler over it and sand it for a glassy surface. The "very high build" 45 min version eliminates the 2 steps of using one coat to protect the foam, and another to create a nice finish.
The release is a spray on crete lease that we carry.
How many times can you use the foam mold?
KarasCyborg 6 months ago
@KarasCyborg
It depends on a few things including the shape and a draft angle for releasing easily from the concrete. Generally speaking the more careful you are the longer they last.
With raw foam usually you can get 5 casts or so. With epoxy coated foam you could get 15 or more. Small breaks in the epoxy can be patched with more epoxy to extend longevity as well.
hotwirecut 6 months ago
Amazing technique.
clampsrobot 1 year ago
what is that epoxy coat called? Brand or any specifics? and for the release agent too, brand/type?
averagemale2000 1 year ago
@averagemale2000
We used our Styropoxy which comes in 15 or 60 min working time - both are "high build". There's a 45 min "very high build" that goes on like peanut butter and is very sand-able.
Some use our standard Styropoxy and auto body filler over it and sand it for a glassy surface. The "very high build" 45 min version eliminates the 2 steps of using one coat to protect the foam, and another to create a nice finish.
The release is a spray on crete lease that we carry.
Hope that helps.
hotwirecut 1 year ago