Artificial Grass Infill Types Compared: Performance, Pros, Cons & Sustainability
Explore the key differences between sand, rubber, and organic infills—understand how each affects playability, durability, and environmental impact.
When designing a high-performance synthetic turf system, choosing the right artificial grass infill is crucial. Infill materials significantly affect the turf’s durability, shock absorption, ball behavior, and safety. This guide provides a comprehensive look at infill options used in modern artificial turf systems, along with their environmental implications, cost profiles, and real-world performance.
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Table of Contents
What Is Infill and Why Is It Important?
Infill refers to the granular materials spread between the blades of synthetic grass, serving several functions:
- It helps fibers stay upright.
- Provides impact absorption and player comfort.
- Enhances ball roll and bounce characteristics.
- Contributes to system durability and drainage.
Modern turf systems often use a mix of performance infills and stabilizing sand, depending on their intended application—sports, landscaping, or playgrounds.
Common Types of Infill Materials
1. Silica Sand
A basic and cost-effective option, silica sand infill is often used as a stabilizing base, particularly in landscape and light-traffic areas.
- Pros: Affordable, widely available, UV resistant.
- Cons: Limited shock absorption; can compact over time.
2. SBR Rubber (Recycled Tires)
One of the most common infills for sports fields.
- Pros: Excellent shock absorption, good ball rebound, cost-effective.
- Cons: Can retain heat, potential concerns over microplastic pollution and chemical leaching.
3. EPDM Rubber
Made from virgin rubber, EPDM infill offers vibrant color options and consistent performance.
- Pros: Non-toxic, durable, lower odor than SBR.
- Cons: Higher cost than SBR; still petroleum-based.
4. TPE (Thermoplastic Elastomer)
A newer, recyclable infill option for those seeking higher environmental standards.
- Pros: Recyclable, odorless, consistent shape and performance.
- Cons: More expensive, limited availability in some regions.
5. Cork
A natural and biodegradable infill sourced from tree bark.
- Pros: Renewable, lightweight, cool underfoot.
- Cons: Higher cost, prone to floatation in heavy rain unless properly stabilized.
6. BrockFILL (Engineered Wood)
An engineered organic material designed to be sustainable and cool in temperature.
- Pros: Natural feel, low heat retention, eco-friendly.
- Cons: Higher upfront cost, may require specific installation techniques.
Performance Comparison in Real-World Scenarios
To understand how infill affects playing performance, we compared two systems using the same turf model (MangoSports ProSport 40), one with SBR and the other with cork infill.
Test Metrics (based on EN 15330-1 standards):
| Parameter | SBR Infill | Cork Infill |
|---|---|---|
| Shock Absorption | 63% | 60% |
| Vertical Deformation | 9.0 mm | 8.2 mm |
| Ball Rebound | 1.0 m | 0.94 m |
| Rotational Resistance | Moderate | High |
| Surface Temperature | High (45°C+) | Low (30–35°C) |
This illustrates that while SBR infill offers slightly more bounce and lower cost, cork infill improves rotational grip and significantly lowers surface heat.
Environmental Impact of Infill Choices
Environmental considerations are becoming increasingly important in synthetic turf projects. Here’s how different materials compare:
- SBR and EPDM: Derived from petroleum and may release VOCs or microplastics over time.
- TPE: Recyclable and more stable, but still synthetic.
- Cork and BrockFILL: Biodegradable, renewable, and safer for stormwater systems.
If you’re pursuing LEED certification or wish to minimize ecological impact, natural infill options are more appropriate—though typically at a higher cost.
Maintenance Considerations
Each infill type has unique maintenance requirements:
- SBR: Needs regular top-up and grooming due to compaction and migration.
- TPE and EPDM: Retain shape better, less frequent grooming needed.
- Cork and organic: May float or biodegrade, requiring seasonal inspection and adjustment.
Proper brushing, infill top-ups, and sanitation (especially for sports fields) are essential for keeping the turf functional and hygienic.
Product List
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