Heavy Metal-Free EPDM Rubber Granules

In the selection of surface materials for sports fields and leisure spaces, heavy metal content and odor issues are coming under increasingly strict scrutiny from global buyers and end users. Our EPDM rubber granules eliminate heavy metal components from the formulation at the source and adopt peroxide vulcanization technology instead of the traditional sulfur vulcanization system, ensuring that the product does not decompose to produce sulfides under high temperatures and strong UV radiation—no odor, no pollution, and no harm to the human body. Our EPDM granules have excellent property of weather resistance, and more healthy because we use the method of peroxide sulfidation, there is no sulfur in our EPDM granules, hence it doesn't produce sulfides when exposed to sunlight, no pollution to environment, no odor and no harm to human body. As a manufacturer with over 25 years dedicated exclusively to EPDM granule production—we make granules only and do not undertake installation—we are able to commit our entire process expertise to the stability and consistency of the granules themselves. We are one of the highest-quality and most cost-effective EPDM granules in China and the world, we'd like to send free samples for you to test.

What Core Problems Do EPDM Granules Solve for Users?

Buyers and users of EPDM granules typically face several recurring pain points. The first is odor and environmental compliance risk: products based on traditional sulfur vulcanization may release sulfide odors under high summer temperatures or strong UV exposure, triggering complaints in sensitive settings such as schools, kindergartens, and residential community facilities, and even affecting acceptance inspections. The second is insufficient color durability: ordinary granules in high-sunlight regions may show noticeable fading and chalking after one to two years of use, causing the field to look deteriorated and bringing forward renovation costs. The third is batch-to-batch color variation: when a large field is supplied in multiple batches, a manufacturer with insufficient color control capability will produce visible color differences at the seams. The fourth is shortcomings in climate adaptability: the intense heat and strong UV of the Middle East, the severe freezing and freeze-thaw cycles of Northern Europe, and the persistent high humidity of tropical rainforest regions each pose distinct challenges to granule weatherability. Peroxide-vulcanized EPDM granules respond to these issues at the molecular structure level: the bond energy of carbon-carbon crosslinks is significantly higher than that of sulfur-sulfur and carbon-sulfur bonds in sulfur vulcanization, resulting in superior thermal stability and oxidation resistance. The practical outcomes are: a sulfur-free formulation eliminates the source of sulfide odor; color retention capability is substantially improved; batch-to-batch color variation is more stably controlled; and performance degradation under extreme climates is slower.

Applications and Core Advantages

Typical applications of EPDM granules cover a wide range of outdoor sports and leisure surfaces. In rubber running tracks and multi-purpose sports courts, colored EPDM granules serve as the anti-slip, wear-resistant top layer, providing a stable friction coefficient and moderate rebound cushioning that reduces the risk of sports injuries. In children's playground safety surfacing, the elastic layer of granules effectively absorbs fall impacts and is one of the standard choices for playground safety paving. In artificial turf systems, EPDM infill granules are used to adjust the rebound performance and surface hardness of the turf, while their sulfur-free formulation avoids infill odor issues. In addition, EPDM mats, fitness trails, kindergarten flooring, and community leisure areas also widely use colored EPDM granules as top-layer or elastic-layer materials.

Compared with alternative materials such as SBR recycled rubber granules or TPE-V, the core advantage of peroxide-vulcanized EPDM granules lies in the balance between weatherability and health safety. The saturated backbone structure of EPDM naturally resists ozone, UV, oxygen, and temperature variation, and peroxide crosslinking further reinforces this stability. In terms of mechanical performance, our granules achieve a tensile strength of 4–7 MPa, with elasticity and tensile properties improved by 2–3 times over conventional processes and a performance retention rate improved by more than 5 times. The flame retardant rating reaches Class 1, and the granules feature low bulk density and strong angular three-dimensionality, offering good dispersion and encapsulation in PU binder, which helps reduce binder consumption during installation. For buyers, this means longer replacement cycles, fewer maintenance complaints, and a smoother acceptance process.

Durability Across Different National Climates

The molecular structure of EPDM itself gives it broad climate adaptability, and peroxide vulcanization further amplifies this advantage. In high-temperature, high-UV regions such as the Middle East, Southeast Asia, and Australia, the granules do not soften, deform, or release odor under sustained heat and intense sunlight, and color retention far outperforms sulfur-vulcanized products. In severe cold regions such as Northern Europe, Canada, and Russia, EPDM maintains good flexibility at low temperatures and can withstand repeated freeze-thaw cycles without embrittlement or chalking. In the tropical rainforests of South America and the high-humidity environments of Southeast Asia, the extremely low water absorption of the granules makes them resistant to mold growth under prolonged damp conditions, and performance does not degrade through hydrolysis. In continental climate zones with sharp day-night or seasonal temperature swings, the thermal expansion and contraction behavior of the granules is stable, making cracking or detachment from the substrate unlikely. Whichever climate zone a project is located in, peroxide-vulcanized EPDM granules can deliver predictable long-term performance.

Frequently Asked Questions (FAQ)

Are your EPDM granules truly heavy metal-free? How can this be proven?

Yes. We implement strict heavy metal control standards from raw material screening to finished product release. Our products comply with the polycyclic aromatic hydrocarbons (PAHs) restrictions of EU REACH regulations, and heavy metal leaching indicators meet relevant standards such as DIN 18035-6/7. Third-party test reports can be provided with samples for verification.

What exactly is the difference between peroxide vulcanization and sulfur vulcanization? What is the practical impact on users?

Sulfur vulcanization crosslinks through sulfur-sulfur bonds, which have lower bond energy and are prone to breaking under high temperature and UV exposure, releasing sulfur-containing compounds and producing odor. Peroxide vulcanization forms carbon-carbon crosslinks with higher bond energy and significantly better thermal stability and oxidation resistance. The direct impact on users: no odor, more durable color, and a longer service life.

What particle size specifications do you support? Can mixed custom sizes be provided?

Standard particle sizes include 0.5–1.5 mm, 1–3 mm, 1–4 mm, and 2–4 mm, and other special specifications can be provided according to your installation process or infill requirements. Combinations of different particle sizes are supported to meet specific requirements for surface texture or infill density.

To what extent can colors be customized? Can you do both RAL and Pantone?

We support RAL color customization, Pantone color customization, and customization based on customer samples. We have a dedicated color matching and sampling process—color swatches or small samples can be sent first for confirmation, and mass production maintains high color consistency through a strict batch color control system.

What is the minimum order quantity? Can you ship by LCL or FCL?

MOQ is flexible, and both full-container (FCL) and less-than-container (LCL) shipments are supported. We understand the differences in inventory pressure and project pace among customers of different sizes; specific MOQ and lead time can be negotiated based on specifications and quantity, and regular orders can be delivered quickly.

Can you provide free samples for testing?

Yes. We are happy to send free samples to global customers for testing particle size feel, color performance, and compatibility with the binder you use. Simply inform us of the required specifications and color direction, and samples can be arranged for shipment.

You only make granules and do not undertake installation—what about technical support?

Precisely because we focus exclusively on EPDM granule production, all our technical efforts are invested in upstream aspects such as granule compatibility with PU binder, particle size grading optimization, and color stability. We can provide granule selection recommendations, reference parameters for binder coordination, and technical explanations of common issues encountered by installation teams when using the granules, but on-site installation is carried out by your installation team or partner.

How are lead time and supply stability guaranteed?

The company has a complete set of advanced production lines and more than 25 years of industry experience, with capacity margin for regular specifications. For custom colors and special particle sizes, we will provide a clear lead time upon order confirmation. Long-term cooperative customers can negotiate safety stock arrangements to ensure supply continuity during peak seasons.

Why Choose Us

We are a professional EPDM colored rubber granule manufacturer, producing EPDM granules only and not undertaking installation. This focus determines how we allocate our resources: the factory's entire process capability, quality control system, and R&D investment are all directed toward a single goal—making granules more stable, more consistent, and more durable. More than 25 years of industry experience means we have been validated repeatedly across different climate regions, application scenarios, and binder systems, and we know which parameters truly matter in real-world use beyond the laboratory.

On the service side, we support OEM, ODM, and Private Label, RAL, Pantone, and sample-based color customization, different particle size specifications and color combinations, and customized packaging. Shipping arrangements are flexible—both FCL and LCL can be arranged—supported by a production base capable of fast delivery and stable supply. In quality control, strict quality control runs through the entire process from raw material intake to finished product release, and high color consistency is our core commitment for multi-batch supply of large-area fields. The products themselves offer excellent UV stability, weather resistance and aging resistance, and high elasticity, with practical use validated across different climate regions worldwide.

If you have a project requiring a quotation, custom colors, or free samples, please contact us directly and let us know the required particle size, color direction, and estimated quantity—we will get back to you as soon as possible.

WOW(LYG) New Material Co Ltd is a manufacturer specializing in the production of EPDM rubber granules. We use the method of peroxide sulfidation technology, it increases the service life by more than 3 times than traditional EPDM granules, and enhances the performance, including Anti aging, high-temperature resistance, and colorfastness.

We have over 25 years of production experience and offer customization for colors and granule sizes. NO MOQ.