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Dec. 19, 2025
Redispersible Polymer Powder (RDP) is an important additive in modern dry mix mortar.
Among the JINT™ RDP series, JINT™-502 is developed for applications where high bonding strength and flexibility are important.
It is particularly suitable for wall putty, tile adhesive and EIFS formulations.
JINT™-502 is a redispersible polymer powder with high bonding strength for dry mix mortars.
It is based on a vinyl acetate ethylene (VAE) copolymer and is produced by spray drying VAE emulsion.
When incorporated into a dry mix mortar and mixed with water,
the polymer can redisperse and contribute to the polymer-modified mortar structure.
The main functions of JINT™-502 are:
- Improved bonding strength
- Improved flexibility
These properties make it suitable for a range of cement-based dry mix mortar systems.
JINT™-502 is mainly recommended for:
For tile adhesive formulations, bonding strength is a key performance requirement.
JINT™-502 can be evaluated when stronger adhesion and suitable flexibility are required.
JINT™-502 can be used in wall putty formulations to improve bonding performance and contribute to the flexibility of the finished material.
For external insulation and finishing systems, the combination of bonding strength and flexibility makes JINT™-502 suitable for formulation trials.
These are the applications currently specified on the JINT™-502 product page.
Some important specifications include:
| Item | JINT™-502 Specification |
|---|---|
| Appearance | White to light beige powder |
| Solid content | ≥98% |
| Bulk density | 450–550 g/L |
| pH value | 5.0–7.0 |
| Minimum film forming temperature | 4°C |
| Tg | 12°C |
| Protective colloid | Polyvinyl alcohol (PVA) |
These specifications can be used as a reference when evaluating JINT™-502 for a specific mortar formulation.
Choosing an RDP should not be based on the powder specifications alone.
For a new formulation, it is more useful to test JINT™-502 in the customer's actual mortar system and compare the results with the existing RDP.
For example, customers can evaluate:
- tensile adhesion strength
- flexibility
- workability
- application performance
- performance after relevant environmental exposure
When comparing RDP samples, keep the cement, sand, cellulose ether, water content and other additives consistent.
This helps identify the actual contribution of the RDP.
JINT™-502 is a practical choice for dry mix mortar manufacturers looking for an RDP with a clear focus on high bonding strength, while also providing flexibility.
Its application range covers three important construction material categories:
Wall Putty → Tile Adhesive → EIFS
For manufacturers developing or optimizing these products, JINT™-502 can be used as a starting point for laboratory trials and formulation optimization.
The right RDP dosage and formulation depend on the final product requirements and the other raw materials used.
Increasing RDP dosage alone does not necessarily solve every mortar problem.
Cement, aggregate grading, cellulose ether, fillers and water content should also be considered during formulation optimization.
If you are looking for an RDP focused on bonding strength and flexibility for wall putty, tile adhesive or EIFS, JINT™-502 is available for sample evaluation.
View JINT™-502 RDP Product Details
Contact JINTEDIFU for JINT™-502 samples and technical support.
Name: Arlo.Hu
E-Mail:arlo.hu@jtdf-rdp.com
Mobile:+86 185 6012 8196（Whatsapp）
How RDP Enhances Adhesion and Flexibility in Tile Adhesives and Wall Putty
The Benefits of Redispersible Polymer Powder in Construction
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