A natural defoamer is a product made from nonartificial ingredients that is designed to remove the thick foam that forms on the surface of water. Some natural defoamers are available from NaturalChemistry.com and OrganicDefoamerGroup.com.
Defoamers, both natural and chemical, are usually made from oils. Oil is able to break the surface of the water and quickly spread throughout it to distribute the active defoaming ingredient. Natural defoamers often use a vegetable oil base as opposed to mineral oil or white oil. Defoaming products have numerous uses, though they are primarily industrial products. In the home, natural defoamers are most often used to clear the sudsing that forms on the surface of the water in spas and hot tubs.