Quick Overview Powafix Multi Filla All Purpose Crack Filler is a tough filler formulated with a unique blend of cement and binders to provide a weather resistant, quick setting and flexible surface for both interior and exterior applications. Multi Filla All Purpose Crack Filler dries white. FEATURES & BENEFITS: Quick setting. Extra strong adhesion. DIRECTIONS FOR USE: Open up all cracks to ensure good adhesion. Surfaces to be filled must be clean and dust free. Cover nails and screws with Powafix Metal Primer to prevent rusting or use a universal undercoat. Add 2 parts Multi Filla to 1 part water & mix thoroughly. Allow to stand 5 min before using. Stir well to smooth paste. Multi Filla Crack Filler remains workable for about 1 hour after mixing. Press paste into cavities with putty knife or trowel. Deep cavities can be filled in two or more stages. Drying time 2-4 hours.Sand smooth with a medium grit sand paper. Prime repaired area with Powafix Water Repellent or Powafix Tradeshield Plaster Primer.