>>473720>Those fancy coatings and treatments like Teflon, Scotchgard, etc., do they actually last?Nothing last forever and no spray-on treatment is going to be as effective as a true waterPROOF fabric, like GoreTex or something that's "rubberized".
But you can buy spray bottles of Scotchguard at the local hardware store and improve the water RESISTANCE of any fabrics, though obviously the effectiveness is increased by using it on non-absorbent fabrics like nylon or polyester.