Drifoam is a powder form of propylene glycol alginate produced by the esterification of alginic acid.  It is designed to give a trouble free method of enhancing and protecting beer foam.

Many years of development have been undertaken to identify both the ideal blend of seaweed species required to yield alginic acid of the necessary quality, and to optimize the critical esterification stage.

The resulting Drifoam is free from the technical problems associated with the less technically refined products on the market.

Drifoam stabilizes beer foam in two ways. Firstly by actively interacting with foam positive, hydrophobic beer polypeptides, and secondly by reducing the impact of foam negative factors.
This latter effect explains the positive role Drifoam also plays in protecting beer foam from external contamination, particularly from grease and detergents.

Stabilizes beer foam by interacting with foam positive proteins

Reduces impact of foam negative factors

Protects beer foam from external contamination

The optimum treatment rate varies from beer type to beer type but typically will be in the range 40 – 60 mg/litre.
Beer foam can benefit from higher addition rates than these, particularly when reduced levels of malt are used in the grist.