plant-safe varnish/sealer?

[zpyder]

Hi all
I was wondering if anyone has any suggestions or ideas on a sealer or paint that I could use to minimise the risk of minerals and chemicals leaching out of materials?

I'm thinking about making some odd shaped dish/bowl things for some utrics out of a polymer clay. (Think of a cross between fimo and plasticene, its soft, but can be baked and sets into a non-toxic plastic)

Though sculpey claims to be non-toxic I have a sneaking suspicion this doesn't mean that it won't leach chemicals out into the soil unless I coat it in a varnish or something? any suggestions?

[Aidan]

A polyurethane pond sealant might do the trick. This link may help:

www.lifeforceonline.co.uk/pond_sealants.html

[zpyder]

Thanks for that, I was wondering about using a pond sealer. However I was curious whether like some other things it isn't t suitable for what I had in mind.

(Such as epoxy putty for use in fishtanks - it's fine, till you put too much in in one go!)

Stay tuned for any updates if I make anything I'm happy with haha!

[matti]

Read the label to see if it's toxic?