Bought this as a 1 litre bottle instead of the usual small branded bottles at my local car parts/accessory shops. This product seems more ‘heavy duty’ in my opinion, though I can’t remember how thick the branded ones used to be, but this aquasteel seems very meaty stuff indeed. Have done some rust on the car and it turns it blue/black ready for a coat of paint. It is water based, so brushes clean easily in water. Very satisfied with it.