can some one help me with this thought

[pokethesmot]

ok since this is a forum of experts i was wondering.... ok i dont have alot of money and all the weather stripping on my truck is bad especially by the windows. Now here is the question if i put a thin layer of petroleum jelly on the window so the silicone sealant wont stick to the glass it would just stick to the frame and gap could i use the silicone caulk to make weather stripping