This Glass Cleaner Concentrate from Meguiar's is tough on vinyl fog residue and can easily handle road grime, smoke film and bug splatter. The results are crystal clear and streak free glass that shines with spectacular effect. For best results the concentrate should be diluted with water in a 10:1 ratio as required. Supplied in a 3.78 litre pack making almost 40 litres of cleaner once diluted. Excellent value ! IMPORTANT: THIS PRODUCT IS INTENDED FOR PROFESSIONAL USE ONLY!WARNING: PROFESSIONAL USE PRODUCTS ARE INTENDED FOR APPROPRIATELY TRAINED PROFESSIONAL/TRADE USERS ONLY, WITH AWARENESS OF CURRENT HAZARD AND SAFETY PROCEDURES/PRECAUTIONS FOR SAFE USE, HANDLING & STORAGE OF THIS PRODUCT.