The DeckReform Textured Roller Cover is 100% necessary for a roller application. Standard paint roller covers will not hold DeckReform due to it's unique filling properties. 1 roller lasts 5-8 gallons of DeckReform. Not for use with Solid Body Stain. For a "brush look", use DeckReform Textured Roller Cover for the 1st and 2nd coat, then back-brush with a wide paint brush before the second coat dries. For a simpler "brush look" installation, use a straw household broom to sweep DeckReform on the surface.