How to Select Proper RDP Grade for Your Mortar Formulation
Release time:
2026-06-15
Choosing the right RDP grade is critical to achieve target mortar performance.
Choosing the right RDP grade is critical to achieve target mortar performance. Two core parameters are glass transition temperature (Tg) and minimum film-forming temperature (MFT).
Low-Tg RDP delivers high flexibility, ideal for exterior flexible mortars and repair materials. Higher‑Tg RDP brings better surface hardness, suitable for tile adhesives and self‑levelling screeds. For humid environments, hydrophobic RDP is recommended to reduce mortar water absorption while maintaining vapor permeability.
Formulators should balance strength, flexibility and water-resistance according to final application scenarios.
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