AC 300 is a concentrated, highly penetrating, water-based, water repellent treatment specific for Cotto and terracotta. Its use is specifically recommended before installation, as it protects the material during the grouting process, making it easier to grout, wash and clean at the end of the installation.
AC 300 creates an effective protective barrier against dirt from grouting and it prevents the grout used from staining the treated materials. The use of AC 300 also adds distinct water-repellent properties that provide effective protection to Cotto and terracotta against rising humidity and all the related issues.
AC 300 penetrates the material deep down, without forming surface film; therefore, it does not affect the original breathability of cotto. Its use will not change the tone, colour or original appearance of the material and will not reduce adherence between it and the adhesive used.