Compounds for use in drinking water applications

The Elastomer Guideline published in 2011 by the Umweltbundesamt (UBA), Germany’s federal environmental agency, decides which input materials can be used for the manufacture of elastomers in accordance with the principles of the European Food Safety Authority (EFSA). The transition period for the Elastomer Guideline ends on 31/12/2021. Numerous sulphur cross-linked compounds currently in use in drinking water applications can no longer be used after that time.

We offer an innovative and efficient solution to this for the drinking water market: KRAIBURG Pure.

This series of EPDM compounds for cold and warm water applications does not only consists entirely of raw materials that will still be allowed after 2021, but also fully satisfies the mechanical requirements for compounds used in drinking water applications (based on EN 681-1).

Since it was brought onto the market, the compound series has held various certificates which confirm that it is suitable for use in the drinking water sector (W270 or EN 16421 and UBA-ELL).


Die französische Trinkwasserzertifizierung ACS

ACS approval

The sulphur cross-linked elastomer compounds, which only contain raw materials which are permitted to be used after 2021, now also have the French drinking water certification ACS (Attestation de conformité sanitaire). The ACS system was developed in 1999 by the French Directorate-General for Health (Direction Général de la Santé).

The certification, which has been mandatory since 2006, confirms the suitability of products which come into contact with drinking water and which are suitable for human consumption.

Britische Trinkwasserzulassung, WRAS

WRAS certificate

In addition, KRAIBURG Pure compounds are also being certified by the British drinking water approval scheme WRAS (Water Regulations Advisory Scheme). Here, the British water regulations authority lays down requirements to check materials for their effect on the water quality. This based on the British standard BS6920:2000.

Approval process

In the first stage, the materials used to make the product are examined for possible effects on the organoleptic (taste, appearance, smell, color) and chemical properties of drinking water. In further tests, these are evaluated with regard to their cytotoxic reaction and the stimulation of microbial growth in order to prevent drinking water contamination. If all requirements stipulated in WRAS are met, the certificates are issued.

3A Sanitary Standards

3A sanitary standard

As well as the European approvals, KRAIBURG Pure compound series also meets the requirements in accordance with 3A Sanitary Standards. The American organization of the same name stipulates hygiene standards for machinery and systems which are used in the dairy, food, drink and pharmaceutical industries.

Among other things, these standards include requirements of the material suitability and fitness for purpose of rubber and materials similar to rubber, for example, compatibility with cleaning agents and disinfectants which are integrated into the machinery and systems and which come into contact with the product.

One main requirement of 3A Sanitary Standards states compliance with the FDA regulations in accordance with CFR 21 Section 177.2600, which determine the permitted “ingredients” of rubber which is to be used in the food industry.

KRAIBURG Pure_Trinkwasser


Color: black

Hardness range: 50 to 85 Shore A

Can be processed in compression, transfer and injection moulding processes

Diverse European drinking water certifications (W270, EN 16421 and UBA-ELL)

UBA-ELL – Type test on 2 mm test plate

Formulation according to FDA §177.2600 positive list

Shelf life expiration date: 120 days according to DIN 7716

KRAIBURG Pure - Certified compounds. For the future.

Contact our specialists.