How to Choose the Right EPDM Granules for Playground Flooring
Not all EPDM granules are the same. A bad batch can lead to fading, cracking, or failed safety inspections.
To choose the right EPDM granules for playground flooring, you need to consider grain size, color consistency, binder compatibility, and the rubber content level.
If you’re planning a poured-in-place rubber surface for a school, park, or kindergarten, understanding EPDM granule specifications is essential to ensuring quality, safety, and design appeal. Here’s a breakdown based on real export experience and manufacturing know-how.
What are EPDM granules made of?
EPDM playground granules are not pure rubber—they are a compound.
Each granule typically contains EPDM rubber, pigment, and calcium powder, mixed and vulcanized into color-stable chips.
High-quality granules offer:
- Strong elasticity
- UV resistance
- Color longevity
- Clean cutting and low dust
At Lanhefloor, we manufacture EPDM with strict mixing ratios and batch control. See full specs:
👉 https://www.lanhefloor.com/epdm-granules/
What size EPDM granules should I choose?
Grain size affects not only the finish look—but also how the surface feels and performs.
The two most common sizes are 1–3mm and 2–4mm.
| Size Range | Surface Feel | Recommended Use | Notes |
|---|---|---|---|
| 1–3mm | Finer, smoother | Logos, walkways, indoor use | Better for sharp color outlines |
| 2–4mm | Textured, robust | Main surfaces in playgrounds | More impact-absorbing |
We usually recommend 2–4mm for most outdoor play zones with 10–15mm poured thickness.
See more use cases: https://lanhefloor.com/outdoor-rubber-floor/
How do I pick the right colors?
Color is not just about aesthetics—it impacts UV stability and branding.
Our EPDM granules come in red, green, blue, yellow, grey, black, and custom Pantone shades.
Tips for color selection:
- Bright yellow and light blue may fade faster if exposed to harsh sunlight
- Use neutral tones for base layers and bright colors for logos
- Always confirm sample color under natural light
We support custom mixes for logos, track markings, or multi-zone play areas. View our project gallery for real designs.
Is 22% binder content enough?
This is one of the most important specs.
Binder ratio refers to the amount of PU binder used during installation—not the granules themselves. But granules must be compatible with common 22% binder mixes.
Our granules are optimized for 22% PU binder for 10–15mm applications. They bond tightly with cushion layers and create a strong surface finish. Avoid granules that repel binder or produce too much surface dust.
How does rubber content affect quality?
High rubber content = better performance.
We recommend 100% virgin EPDM polymer-based granules or at least 20%+ true EPDM rubber content by weight.
| Rubber Content Level | Performance Quality | Typical Market Use |
|---|---|---|
| <15% | Poor elasticity, fades | Low-end domestic projects |
| 18–22% | Medium durability | Budget-conscious projects |
| 22–25%+ | Excellent resilience | Public parks, schools |
Avoid recycled SBR sold as EPDM—it leads to color loss and poor bonding.
Other important factors to consider
Beyond size and color, look at the following:
- Packaging strength – We ship in 25kg high-density PE bags or jumbo bags
- Clean cut & low dust – Easier for mixing and troweling
- Moisture-proof – Keeps material stable before installation
- Certifications – Our granules pass EN1177 safety tests and CE compliance
More on certifications:
👉 https://lanhefloor.com/rubber-certifications/what-certifications-should-gym-flooring-have-in-europe-2/
Recommendations by project type
| Project Type | Suggested Size | Color Strategy | Notes |
|---|---|---|---|
| Kindergarten | 2–4mm | Bright color + grey base | 22% binder + soft underlay |
| Public Park | 2–4mm | Durable dark tones + logo | Use certified granules only |
| School Courtyard | 1–3mm + 2–4mm | Mixed for detail & impact | Balance look with safety |
| Daycare Center | 2–4mm | Soft colors, less contrast | Avoid oversaturated tones |
Need help with surface design? Contact us at Lanhefloor
Conclusion
Choosing the right EPDM granules means balancing safety, color design, and long-term durability. Don’t just go by price—go by performance.
Related Reads:
Explore certified EPDM flooring solutions or request a custom quote at Lanhefloor. We export to 20+ countries with reliable support for public projects.