Perfect size for making Coasters with resin and/or wood and then cutting to final size once set.

HDPE plastic is a non-stock plastic that cured resin easily releases from. You don't even need to use any kind of release spray or tape. 

The edges are welded, so are all presealed meaning that you don't need to worry with the hassle of using hot glu or silicon to seal the edges. Just simply set on a sturdy flat surface and pour your product. Leave to fully cure and then turn the mold over and with a few light hammers, the finished product will drop out.

Table in image is an example of resin product made using a similar HDPE mold and is not for sale as part of this listing.