ETAG certification confirms long-lasting performance of new roofing emulsion polymer

Horgen, Switzerland - February 20, 2018 - A liquid applied roof waterproofing membrane based on a formulation developed by Dow Construction Chemicals (DCC) - a business unit of DowDuPont Materials Science Division (NYSE: DWDP) – has achieved ETAG (European Technical Approval Guideline) certification, making it easier for roof membrane manufacturers to obtain CE marking for their products when using the same formulation.

The waterproofing membrane - using water-borne PRIMAL™ EC-5210 PU Acrylic Polyurethane technology - has been successfully tested according to ETAG 005, which specifically covers Liquid Applied Roof Waterproofing Kits. ETAGs are given to finished building materials, and enable products to use the CE mark, which are mandatory in many European countries, and widely recognised within the construction industry as a reliable quality indicator.

With the development of novel PRIMAL™ EC-5210 PU Acrylic Polyurethane Emulsion Polymer, Dow Construction Chemicals has enabled the formulation of a liquid-applied, high quality roof waterproofing membrane that performs against key durability criteria, is cost-effective, and - as it is water-borne – helps to manufacture a roof membrane with an improved environmental, health and sustainability profile.

In order to achieve ETAG 005 the membrane formulated with PRIMAL™ EC-5210 PU polymer had to demonstrate that it would last for an expected 10 year lifespan, and perform against severe climate tests under different conditions, including service temperatures of up to 90°C.

“PRIMAL™ EC-5210 PU Acrylic Polyurethane Emulsion Polymer could be the key component in our customers’ formulations, so using our proprietary guide formulation should help manufacturers achieve CE marking for their roofing membranes much more efficiently,” explained Jouko Vyorykka, R&D Manager for Dow Construction Chemicals. “The next step is to aim for 25 year lifespan certification, which requires five years of real life exposure, and we are already well underway with that thanks to test sites already installed.”

About Dow Construction Materials
Dow Construction Chemicals combines its deep application know-how, material science and formulation competence to offer manufacturers key building blocks for formulating efficient and differentiated building and construction materials. With a broad range of technologies – including cellulose ethers, redispersible latex powders, silicones and acrylic emulsions – the business is a leading supplier to customers around the world and addresses the specific requirements of the industry across many market segments and applications, from roofing to flooring, and gypsum-, cement-, concrete- or dispersion-based building materials. Its chemistries are designed to help advance the performance, durability and aesthetics of buildings and infrastructure.

About DowDuPont Materials Science Division
DowDuPont Materials Science, a business division of DowDuPont (NYSE: DWDP), combines science and technology knowledge to develop premier materials science solutions that are essential to human progress. The division has one of the strongest and broadest toolkits in the industry, with robust technology, asset integration, scale and competitive capabilities that enable it to address complex global issues. DowDuPont Materials Science’s market-driven, industry-leading portfolio of advanced materials, industrial intermediates, and plastics businesses deliver a broad range of differentiated technology-based products and solutions for customers in high-growth markets such as packaging, infrastructure, and consumer care. DowDuPont intends to separate the Materials Science Division into an independent, publicly traded company. More information can be found at www.dow-dupont.com.