Quality
Standards & approvals
An overview of the various standards and approvals for elastomers and plastics. In many industries they are essential to ensure the highest standards of quality, safety and functionality.
Drinking water
KTW · EN 16421 · DVGW
Food
FDA · BfR · EC 1935/2004
Fire behaviour
UL94
Medical
USP Class VI
Overview
Tested for demanding applications
In many industries, standards and approvals are essential to ensure the highest standards of quality, safety and functionality. For seals and elastomer products, this means they must meet strict tests and requirements in order to work reliably in demanding applications.
On request, we supply our materials with the appropriate approval or conformity. We will be happy to answer any detailed questions.
At a glance
Our standards & approvals
UL94
Underwriters Laboratories, flammability of polymeric materials
The certificate for specific fire protection requirements: UL 94 classifies the flammability of polymeric materials.
KTW-BWGL
Assessment basis for plastics in contact with drinking water · WRAS UK
KTW stands for Kunststoff-Trinkwasser (plastics in drinking water): the German assessment basis for plastics, elastomers, TPE, coatings and lubricants in contact with drinking water.
EN 16421
Influence of materials on drinking water, enhancement of microbial growth (formerly W270)
The influence of materials on water intended for human consumption, specifically the enhancement of microbial growth.
ELL
Elastomer Guideline, superseded by KTW-BWGL since 1 July 2026
The ELL was Germany's authoritative basis for the hygienic assessment of elastomers in contact with drinking water. Since 1 July 2026, assessment has been carried out under the KTW-BWGL.
FDA
U.S. Food and Drug Administration
Suitability of materials and products for use in the food industry.
BfR
German Federal Institute for Risk Assessment (Bundesinstitut für Risikobewertung)
Recommendations on the health assessment of materials for food contact.
DVGW
German Technical and Scientific Association for Gas and Water (Deutscher Verein des Gas- und Wasserfaches)
For products that come into contact with drinking water or with gas-carrying lines and systems.
EC 1935/2004
Regulation on materials intended for food contact
The central legal basis for materials that come into contact with food.
NSF
Food contact according to NSF/ANSI 51
NSF tests and lists materials, components and equipment for food contact.
USP Class VI
United States Pharmacopeia, biocompatibility
For medical and pharmaceutical applications.
Working together
Which approval does your application need?
Tell us your industry, medium and required standard, and we will recommend the right material and the right approval.