quality

PRODUCED AND CERTIFIED TO HIGH STANDARDS

The quality of our products is based on our excellent raw material deposits, modern, efficient processing technology and an integrated quality management system. Based on our high production standards and our many years of experience, we produce both standard products and customised blends for every industry.

Production process

Using state-of-the-art technologies, we produce high-quality sands and gravels as standard products and customised solutions.

LEARN MORE

Quality management & certification

WOLFF & MÜLLER Quarzsande GmbH has been continuously certified in accordance with the DIN EN ISO 9001 quality management system since 1998.

LEARN MORE

This website uses cookies. Those have two functions: On the one hand they are providing basic functionality for this website. On the other hand they allow us to improve our content for you by saving and analyzing anonymized user data. You can redraw your consent to using these cookies at any time. Find more information regarding cookies on our Data Protection Declaration and regarding us on the Imprint.

Mandatory

These cookies are needed for a smooth operation of our website.

Name	Purpose	Lifetime	Type	Provider
CookieConsent	Saves your consent to using cookies.	1 year	HTML	Website
fe_typo_user	Assigns your browser to a session on the server.	session	HTTP	Website

Marketing

With the help of these cookies we strive to improve our offer for our users. By means of anonymized data of website users we can optimize the user flow. This enables us to improve ads and website content.

Name	Purpose	Lifetime	Type	Provider
_gcl_au	Used by Google AdSense to experiment with advertisement efficiency.	3 months	HTML	Google
AMP_TOKEN	Contains a token that can be used to retrieve a Client ID from AMP Client ID service. Other possible values indicate opt-out, request in progress or an error retrieving a Client ID from AMP Client ID service.	1 year	HTML	Google
_dc_gtm_--property-id--	Used by DoubleClick (Google Tag Manager) to help identify the visitors by either age, gender or interests.	2 years	HTML	Google

External content

With the help of these cookies we strive to improve our offer for our users. By means of providing video content or other useful content like maps to enhance the user experience.

Name	Purpose	Lifetime	Type	Provider
GoogleMaps	Is used to connect to Google Maps and to display those maps.	none	Connection	Google
YouTube	Is used to connect to YouTube and to display videos.	none	Connection	YouTube