RDP JINT Series Selection for Mortar Projects: Key Criteria & Practical Guide

Choosing the right Redispersible Polymer Powder (RDP JINT series) is pivotal to mortar project success. 

As a core additive, it directly impacts mortar flexibility, adhesion, water resistance, and durability. 

This condensed guide outlines essential selection factors to align the product with your project needs.

  1. Core Performance Indicators to Prioritize

  Focus on these non-negotiable metrics when evaluating RDP JINT series:

  - Elasticity & Deformation Resistance: Opt for products with appropriate tackiness and 

    recovery performance to withstand minor shifts-critical for exterior rendering or repair work;

  - Tensile Strength: Ensure compliance with industry standards to maintain structural integrity under stress;

  - Film-Forming Properties: A uniform, dense film enhances water resistance and substrate bonding; 

    consider ambient temperature/humidity compatibility;

  - Water Resistance: Essential for moisture-exposed projects (walls, bathrooms, basements)

    verify with test data or third-party certifications;

  - Adhesion Strength: Test on your specific substrate (concrete, masonry, tiles) to ensure secure bonding.

 2. Compatibility with Mortar Components

 RDP JINT series must synergize with cement, aggregates, and fillers. 

 Conduct compatibility tests beforehand to avoid reduced strength, 

 cracking, or premature failure.

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3. Specification Selection

Tailor your choice to application requirements, supported by product-specific guidelines:

Notes: C1/C2 = tensile adhesion classes; D1/D2 = flexibility classes. 

              Higher Tg = greater rigidity; lower Tg = better flexibility.

- Tile Adhesives: Prioritize high adhesion (e.g., RDP JINT-740 for C2 class) and shear resistance.

- Exterior Rendering: Choose VAE-based RDP (e.g., RDP JINT-502) for UV, temperature, and moisture resistance.

- Self-Leveling Mortars: Select products boosting workability and crack resistance.

- Repair Projects: Opt for flexible, high-adhesion RDP (e.g., RDP JINT-745) to bond with existing structures.

4. Climate & Thermal Stability

Select RDP JINT series adaptable to local conditions (extreme temps, high humidity). 

Ensure thermal stability to retain properties across temperature ranges and prevent cracking.

5. Manufacturer Quality & Standards

Transparent TDS: Verify detailed chemical composition, performance data, and application guidelines.

Tg : Match glass transition temperature to rigidity/flexibility needs.

Conclusion

Selecting RDP JINT series requires balancing performance metrics, project needs, 

component compatibility, climate adaptability, and manufacturer credibility. 

By focusing on these key factors, you ensure mortar durability and project success.

BY: Melody Lee

Email: melody.lee@jtdf-rdp.com

Mobile: +86 186 6375 9818

Whataspp: +86 187 6398 8189