Protafloc Granules 25g BB:15/06/2024


Protafloc Granules 25g BB:15/06/2024


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Protafloc Copper Fining Granules – a precise tool to help product clear home brewed beer.  Easy to use and store at home.

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Protafloc Copper Fining Granules – Granule form of Irish moss.

Allows more precise dosing compared to using tablet form.

Protafloc granules are a food grade semi refined kettle finings which are added 10 minutes from the end of the boil.

Optimised use at 0.01-0.05g/L provides all the benefits below.

Suitable for most brewers- Protafloc granules are economical and highly effective product


• Brilliant wort clarity – Protafloc is optimised for removal of haze sensitive proteins from wort. It achieves clarity by precipitating virtually all haze material from cold worts and giving extensive cold break formation

• Reduced costs of beer processing – Protafloc reduces costs by removing fine proteinaceous particles, simplifying downstream fining, filtration and beer stabilisation

• Energy savings from reduced boil times – Protafloc will maintain performance even with reduced boil times

• Consistent beer fining – Protafloc can clean up worts with variable particle content presenting a more consistent beer for racking

• Prolonged beer shelf-life – Protafloc removes substantial qualities of proteinaceous haze-precursor material without affecting head retention


The active ingredient in Protafloc is a polysaccharide called carrageenan which is derived from seaweed. Carrageenan in solution is negatively charged, owing to the sulphate groups along the polysaccharide backbone. It is these charged sites which interact with wort proteins.

In solution at temperatures above 65°C, the carrageenan has a random coil structure. As the wort cools the carrageenan takes a much more compact and ordered helical structure which is thought to drag the protein particles together to form aggregates. The aggregates, having a larger particle radius, settle faster.

Kettle finings are added in the kettle only to allow the carrageenan to dissolve. Wort proteins react with carrageenan as the wort cools and settle as a cold break during fermentation to be removed along with the excess yeast.

The removal of particles and protein from wort has been demonstrated by microscopic examination of pre-filtered beers and protein assay.

As the levels of kettle finings increase, the fine particle counts decrease. It should be noted that the particles below two microns are mostly responsible for blinding filter pores.

Since Kettle Finings remove both particulate and soluble protein, and soluble protein is a component of chill haze, it is unsurprising that the colloidal stability of kettle fined beers is enhanced.

Application and rates of use

Protafloc Granules should be added to the kettle ten minutes prior to the end of the boil or to the whirlpool if this is not possible. This allows the powder to dissolve and disperse the carrageenan into the wort. Should Protafloc be added early in the boil, then degradation of the polymer may occur and product efficiency is lost. The reaction between wort proteins and carrageenan is pH dependant and occurs at an optimum pH of 5.3. Below pH 4.4, the reaction does not occur and little benefit is gained from using Kettle finings.

Kettle finings optimisation procedure

The exact rate for a given wort will vary according to the brewery, the recipe and the types of malt and adjuncts used. Typical rates vary from a range of 0.75g to 4.8g per hl , but a kettle finings optimisation should be carried out to determine this more accurately. Rates of use should be checked when you change supplier or move to new seasons malt.

When the dose rate increases, the clarity improves, but the level of sediment increases.

Over-fining will give rise to beer losses in fermentation vessel. The optimisation procedure is as follows:

• Make up a solution of kettle finings by dissolving 1g of carrageenan product in a litre of boiling water. (This gives a 0.1% solution)

• Label seven 100 ml measuring cylinders in 5 ppm increments, including a 0ppm control up to 30ppm

• Add a range of finings rates to the 100ml measuring cylinders using a 10ml pipette (0.5 ml of kettle finings solution = 5ppm).

• Take a wort sample (approx. 2L) 15 minutes before the end of the boil and just before the addition of kettle finings.

• Fill the measuring cylinders with 100ml of hot wort.

• Record the wort clarity and appearance of the hot break.

• Cool by immersion in cold water in the bucket for 20 minutes.

• Allow to settle for 2 – 4 hrs and observe the appearance of the cold break, recording the wort clarity and cold break volume.

• Allow to stand for a full 24 hours to get a final result.

• Decide on the optimum rate of kettle finings addition for the beer in question, there should be bright clear wort and compact sediment.

Storage and shelf life

• Store in cool conditions away from direct sunlight

• Keep in original container

• Maximum storage temperature is 30°C

• Keep containers sealed when not in use

• Recommended storage temperature is 10°C – 15°C

• The shelf life at the recommended storage temperature is at least three years from the date of manufacture

For more information on fining beer please check out our Help Centre and our YouTube channel where you will find lots of free to use helpful home brewing content.

Additional information

Weight 0.025 kg
Country of Origin GB
HS Code 3503001000


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