Warning: Do Not Use Mastic In Wet Areas
Ceramic tile adhesive, or mastic as it is commonly referred to, is one of the products that can be used to install certain types of tile. It is extremely popular because it is very easy to use with no mixing involved. It can be purchased at your local home improvement store and you can store it for a relatively long time without it going bad and becoming unusable.
Where It Can Be Used Safely:
Mastic can be safely and effectively used to install many types of backsplash materials. If you are having a new backsplash installed in your kitchen, as an example, mastic would be preferred over thin-set mortar for a variety of reasons, including ease of use (no mixing of powder and water), which saves time before, during and after the job. It's quite easy to pop open the lid of the adhesive and start troweling it on the wall, being able to simply close it up later on when you are done for the day, and be able to continue using it the next day with no wasted material if there is more left to do. With thin-set, you need a mixing drill, mixing paddle, buckets, and a space to mix outside of the immediate work area to avoid mess. You also need to ensure that you don't mix too much at a time, or else it may skin over and lose important adhesion characteristics. A tub of mastic won't dry up or skin over anywhere near as quickly as a bucket of mixed thinset mortar. This is why mastic is preferred in many cases where a backsplash is being installed; it allows for the installer to make the minute and detailed adjustments necessary when working with the backsplash tile,