The usage instructions are recommendations based on the tests we have conducted and on our experience; we advise conducting your own tests before each application. Due to the wide range of applications and of storage and usage conditions, we cannot guarantee a specific application result. Insofar as our free customer service provides technical information or acts as an advisory service, no liability is assumed in relation to the provision of this service except where the advice or information given falls within the scope of our specified, contractually agreed service or the advisor was acting deliberately. We guarantee the consistent quality of our products. We reserve the right to make technical changes and further develop products.