After searching, sourcing and running tests, we have found Mapei Kerabond PLUS with the inclusion of Mapei Isolastic has proven far better than most tile adhesives in comparison. It left us with generally no issues with bonding, excess removal, working consistency and most importantly how most substrates did not stain or change in appearance. With the exclusion of very porous type materials which most certainly needs a quicker drying system that of Mapei Granirapid. Stone Doctor Australia strongly recommends using Kerabond PLUS as your first choice when selecting adhesives. Available in white or grey.