Redispersible polymer powder (RPP) is a common additive used in dry mortar products. It is a free-flowing powder that is produced by spray-drying a polymer emulsion. When added to dry mortar mixes, it improves adhesion, flexibility, workability, and durability.
Here are some applications of RPP in different dry mortar products:
- Tile adhesives: RPP is commonly used in tile adhesives to improve adhesion, reduce water absorption, and increase flexibility. It helps the adhesive to bond strongly to the substrate and to the tile. Additionally, it provides excellent water resistance, which is essential in wet areas like bathrooms and kitchens.
- Exterior insulation and finishing systems (EIFS): EIFS is a type of cladding system that is used to improve the energy efficiency of buildings. RPP is used in EIFS to improve the adhesion between the insulation material and the substrate. It also improves the workability of the mortar and reduces shrinkage.
- Self-leveling compounds: RPP is used in self-leveling compounds to improve the flow and leveling properties of the mortar. It also provides excellent adhesion to the substrate and reduces shrinkage. Self-leveling compounds are commonly used to level concrete floors before applying a final floor finish.
- Repair mortars: RPP is used in repair mortars to improve the adhesion between the repair mortar and the substrate. It also improves the workability of the mortar and reduces shrinkage. Repair mortars are commonly used to repair concrete surfaces that have been damaged due to cracking or spalling.
- Grouts: RPP is used in grouts to improve the adhesion between the grout and the tiles. It also provides excellent water resistance, which is essential in wet areas like bathrooms and kitchens. Grouts are commonly used to fill the gaps between tiles after they have been installed.
Overall, the use of RPP in dry mortar products has many benefits and can help to improve the performance and durability of the mortar.