Surfaces should be sound, dry, clean and free from damp, dust and grease.
Apply filler in layers no more than 6mm thick, allowing each layer to set before applying the next. Fill slightly proud of surrounding surface and when fully set sand down to a fine finish.
Tools and equipment should be cleaned with water immediately after use. Replace lid after use to prevent any unused filler from drying out. Wash hands with soap and water after use.