Dear Noemi, here is one i used before coating the PDMS on Si: Aldrich: chlorotrimethylsilane (CMS), redistilled, 99+%, contains <0.1% dichorodimethylsilane zeta ucla Noemi Graziana SPARTA' wrote: > Hi, > Until now I used Dimethyl(3,3,4,4,5,6,6,6-nonafluorohexyl)chlorosilane from Sigma Aldrich to funzionalize Silicon or glass wafers before creating PDMS stamps using softlithography techniques.A few days ago I found that Sigma Aldrich doesn't produce this product anymore.Can you suggest to me a supplier that sells this product or equivalent? > Thanks in advance > Noemi