Silane is soluble in hydrocarbon solvent and PEG in polar solvent. You can try with solvent mixture depending on the %wt of each. THF also works for some composition,

Thank you Dr. Samui, 

I'll try several polar solvent as you told.

Thank you for your time to answer my question.

Best,

Diem

Diem Phuong Nguyen Do you get the answer of your question? Hope to get the answer form you. thanks