Trade Chemicals R101 is a high-quality, 250ml radiator inhibitor designed to protect your bathroom radiators from the harmful effects of corrosion and limescale build up. This versatile product is suitable for use with all types of radiators, including those made from aluminium. With its powerful formula, R101 provides long-lasting protection against rust, scale, and other contaminants, helping to keep your radiators running smoothly and efficiently. It inhibits scale & corrosion, helps maintain and improve radiator efficiency, and is effective even at -7 degrees. 250ml is enough to treat any standard towel radiator up to 50L. Simply pour the entire contents of this bottle into your towel radiator, then fill with water.