I don't know if it is for sale in the US.
Seramis is clay granulate so maybe there is a similar product available in the US.
Here is a english link about seramis
http://www.seramisuk.co.uk/whatisseramis.html
Seramis is clay granulate so maybe there is a similar product available in the US.
Here is a english link about seramis
http://www.seramisuk.co.uk/whatisseramis.html