Nilfisk Stone Sealer Detergent 2.5L - 125300388Nilfisk Pressure Washer Stone Sealer Cleaner 2. 5L 125300388 Nilfisk pressure Stone Sealer detergent is friendly for all Nilfisk pressure washers. Key Features: Application Coverage Approx 100 m2 per 5Litre. Easy to use Apply with Super Foam Sprayer for pressure washer for efficient foam coverage. Best Results Use chemical on damp surfaces , this will provide a long lasting effect and avoid spraying when rain is expected for the next few days. Long