I need to find a low cost and environmentally free hydrophobic agent. Can anyone help?

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David Jensen

What do you mean by "environmentally free".... do you mean environmentally friendly?

Mehrdad Rashidzadeh

Thanks dear

But every silanes group for example trimethyethoxysilane is very expensive for use in wide products. I need very low cost and effective agent that works like silans for axample paraffin is low cost but isn't very effective!.yes it shouldn't be harmful for natur and humans.