WRAS rubber is a type of elastomer that has been specifically designed and certified for use in contact with drinking water. WRAS stands for Water Regulations Advisory Scheme, which is a UK-based organization that provides guidance and certification on the use of materials and products in contact with drinking water. The WRAS certification process ensures that the materials and products have been tested and meet the necessary standards for use in contact with drinking water.

WRAS rubber is typically made from a blend of synthetic rubbers, such as EPDM (ethylene propylene diene monomer) or NBR (nitrile butadiene rubber), which have been formulated to meet the specific requirements for use in contact with drinking water. These requirements include low levels of extractable substances, such as heavy metals and volatile organic compounds (VOCs), as well as resistance to degradation from exposure to chlorine and other disinfectants commonly used in water treatment.

To ensure that WRAS rubber meets the necessary standards for use in contact with drinking water, it must undergo a rigorous testing and certification process. This process typically includes testing for extractable substances, as well as testing for resistance to aging, exposure to disinfectants, and other environmental factors.

In addition to its use in the water industry, WRAS rubber is also used in other industries where there is a need for materials that are safe for use in contact with food and drinking water. These industries include the food and beverage industry, as well as the pharmaceutical industry, where WRAS rubber is used in the manufacturing of drug delivery devices and other medical products.