What is the difference between C1 and C2 tile adhesive?

The main difference between C1 and C2 tile adhesive is their classification according to European standards. C1 and C2 refer to the two different categories of cement-based tile adhesive, with C2 being a higher classification than C1.

C1 tile adhesive is classified as a “normal” adhesive, while C2 tile adhesive is classified as a “improved” or “high-performance” adhesive. C2 adhesive has higher bonding strength, better water resistance, and improved flexibility compared to C1 adhesive.

C1 tile adhesive is suitable for fixing ceramic tiles on internal walls and floors. It is typically used in low traffic areas, where there is minimal exposure to moisture or temperature fluctuations. It is not recommended for use in wet areas, such as bathrooms, or in areas where there is high traffic or heavy loads.

C2 tile adhesive, on the other hand, is designed for more demanding applications. It is suitable for use in wet areas, such as bathrooms and kitchens, and can be used to fix a wider range of tile types, including porcelain, natural stone, and large-format tiles. It also has improved resistance to temperature changes and can be used on substrates that are prone to movement.

Another key difference between C1 and C2 tile adhesive is their working time. C1 adhesive typically sets faster than C2 adhesive, which gives installers less time to adjust tile placement before the adhesive sets. C2 adhesive has a longer working time, which can be beneficial when installing large-format tiles or when working in areas with complex layouts.

In summary, the main differences between C1 and C2 tile adhesive are their classification according to European standards, their strength and flexibility, their suitability for different types of tiles and substrates, and their working time. C1 adhesive is suitable for basic applications, while C2 adhesive is designed for more demanding applications. It is important to choose the right type of adhesive for the specific tile and substrate being used to ensure a successful installation.