Frost Stop is a completely safe natural additive to prevent water freezing in bird baths and water features. Effective to -60C, it prevents frost damage to stone or resin features and baths, keeps fountain pumps working and ensures a supply of drinking water for garden birds.

Contains 250ml, enough to treat 45 litres (10 gallons) of water. Each dose will last approximately one month. Safe for all birds, wildlife, children and pets.