RAL 7037 EPDM Rubber Granules

RAL 7037 is a matte mid-grey with a neutral hue—neither warm nor cool—widely adopted in industrial and functional applications. Applied to EPDM rubber granules, it means you get not a striking decorative color but a durable, dirt-tolerant functional grey granule that maintains visual consistency over the long term. For outdoor sports surfaces or recreational areas that pursue understated texture and need to mask dust and wear, this is a pragmatic choice. We focus exclusively on manufacturing EPDM granules and do not undertake installation, so this article will start from the material itself and objectively explain what problems this color granule can solve for you and why it deserves to be selected.

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. 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.

From Your Perspective: Core Problems EPDM Granules Solve

Whether you are a facility contractor, an artificial turf system integrator, or a manufacturer of mats or prefabricated rubber products, the questions you truly care about tend to concentrate on a few points: how long the color will last, whether odor will trigger complaints, whether it will fail prematurely under different climates, whether batch-to-batch color variation is controllable, and whether supply can keep up with project schedules.

RAL 7037 EPDM granules respond to these pain points directly. Using peroxide vulcanization rather than sulfur vulcanization eliminates the presence of sulfur from the source. This means that under high temperatures and strong UV radiation, the granules will not decompose into sulfides, and therefore will not produce irritating odors—friendlier to both users and the surrounding environment. At the same time, the carbon-carbon crosslinks formed by peroxide vulcanization have higher bond energy and a more stable molecular structure, significantly improving the granules' anti-aging performance and property retention rate—you are not paying for a short-term effect of one or two years, but investing in a longer replacement cycle.

Application Scenarios and Core Advantages

RAL 7037 EPDM granules find use in virtually all scenarios requiring colored elastic granules, both outdoor and indoor: various sports fields and running track surfaces, infill granules for artificial turf systems, EPDM mats and prefabricated rubber tiles, wet-pour surfaces for children's playgrounds, fitness trails, and community recreational sports areas. With its neutral grey tone, it is especially suitable for venues where the ground color should not dominate but clear functional zoning is still needed.

Its advantages can be understood on three levels. The first is universality at the weather-resistance level. The EPDM molecular backbone is saturated and inherently resistant to ozone, UV, and thermo-oxidative aging, and peroxide vulcanization further amplifies this advantage. Whether in the high-temperature exposure of the Middle East, the freeze-thaw cycles of Northern Europe, the high humidity and heavy rain of Southeast Asia, or the drastic temperature swings of inland regions, these granules maintain relative stability in elasticity and color. The second is certainty at the safety and environmental level. The sulfur-free formula means no hydrogen sulfide-type odor release, which for venues near schools, kindergartens, and residential areas is often a higher priority than price itself. The third is tolerance at the processing and installation level. The granule morphology—low bulk density and strong angular three-dimensionality—provides good wettability and encapsulation when mixed with polyurethane adhesive, helping to form a uniform, dense surface structure that resists granule detachment.

Durability Across Different Climate Regions

Purchasers from different countries face vastly different climatic conditions, and if a granule has only been validated in temperate climates, it is hard to inspire confidence. The formulation of RAL 7037 EPDM granules accounts for the actual stresses of major global climate zones:

High-temperature, high-UV regions (Middle East, Australia, parts of Africa, southern Americas): The carbon-carbon crosslink network of peroxide vulcanization offers better thermal stability than the sulfur-sulfur bonds of sulfur vulcanization, resisting crosslink scission under sustained high temperatures and maintaining color vibrancy more effectively. Grey itself has lower visual sensitivity to UV, so even after prolonged sun exposure, perceived color shift is far less than with vivid color systems.

Rainy and humid regions (Southeast Asia, UK, western Northern Europe): The saturated backbone structure of EPDM gives it excellent hydrolysis resistance; rainwater immersion does not cause granule swelling or strength loss. Grey does not show water stains when wet and recovers visually quickly after drainage.

Severe cold and freeze-thaw alternating regions (northern North America, Northern Europe, Russia, northern China): The high crosslink density and low permanent deformation characteristics of the peroxide vulcanization system make the granules less prone to hardening and embrittlement during repeated freeze-thaw cycles, with elasticity decay significantly slower than conventional vulcanization products.

Regions with drastic day-night temperature swings (plateaus, desert margins, inland continental climates): The material has a low thermal expansion coefficient and a stable crosslink network; internal microcracks do not form under sharp temperature changes, resulting in higher long-term property retention.

Frequently Asked Questions (FAQ)

What exactly is RAL 7037? Will it lean blue or yellow?

RAL 7037 Dusty Grey is a neutral grey with extremely low chroma, known in the RAL color card system for being "non-cast." Its neutral hue means it will not conflict with any venue fencing, building facades, or artificial turf green, nor will it appear jarring due to warm or cool changes in ambient light.

What is the biggest practical difference between peroxide-vulcanized granules and ordinary sulfur-vulcanized granules?

The most intuitive difference is odor. Sulfur vulcanization systems may release sulfur-containing odors under outdoor UV exposure and high temperatures, easily triggering complaints around enclosed or semi-enclosed venues. Peroxide vulcanization eliminates this source at the formulation level. Second is service life: the higher bond energy of peroxide crosslinks provides better thermo-oxidative aging resistance, with more reliable elasticity retention and color stability after long-term use.

What particle sizes can you offer? Can RAL 7037 be customized to other sizes?

Standard available sizes include 0.5-1.5mm, 1-3mm, 1-4mm, and 2-4mm, with special specifications customizable according to your installation process or product requirements. Different sizes suit different scenarios: finer sizes for mats and thin-layer surfacing, coarser sizes for artificial turf infill and high-elasticity surfaces.

Will grey granules look dirty outdoors? How is their dirt resistance?

Visually, neutral grey actually tolerates dust, mud, and minor wear better than light and vivid color systems. The medium-low lightness of RAL 7037 makes surface dust less likely to form obvious contrast, which is one reason this color family is widely chosen for industrial floors and functional areas. Routine cleaning is sufficient to maintain good appearance.

If we need our own brand packaging or specific colors, can you accommodate that?

Yes. We support OEM, ODM, and Private Label. For colors, beyond the RAL system, we also support Pantone color matching and customer sample-based customization. Packaging can be designed to your requirements, with full-container and LCL shipment supported.

You only produce granules and don't install—what if we encounter material compatibility issues during installation?

Our positioning is clear: we focus on EPDM granule production and do not undertake installation. This precisely means we have no incentive to recommend any particular adhesive brand or installation scheme to bundle sales. We can provide neutral adhesive ratio suggestions and installation parameter references based on the granules' bulk density and surface characteristics, helping you or your installer make independent judgments.

What are the lead times and supply stability like?

With over 25 years of industry experience and a full set of advanced production lines, we have stable continuous production capacity. Orders for standard colors and sizes can be completed in a relatively short time; custom colors require confirmation of sampling and production scheduling based on the specific color code. We serve both full-container and LCL customers, with a dedicated supply plan coordination mechanism for long-term partners.

Why Choose Us

Choosing a granule supplier is essentially choosing consistency and certainty.

We only make EPDM granules and do not undertake installation. This means our entire focus is on the material side: how to make each batch of RAL 7037 closer in color, how to make vulcanization more uniform, and how to make particle size distribution more controllable. Over 25 years of industry accumulation is not a decorative phrase—it is reflected in our mastery of peroxide vulcanization process parameters, our experience in screening raw materials from different origins, and our clear understanding of which indicators need margin when facing customers with different climates worldwide.

In terms of customization capability, the options we offer cover the complete chain from color to particle size, from packaging to labeling: RAL color customization, Pantone color customization, sample-based customization, multi-color combinations, 0.5-1.5mm to 2-4mm and special particle sizes, custom packaging, OEM/ODM/Private Label. You do not need to accept a "close enough" substitute for a non-standard particle size, nor do you need to find a second repackaging plant for your own brand label.

In terms of quality control, we focus on the indicators that truly affect your long-term user experience: high color consistency, excellent UV stability, weather resistance and anti-aging, high elasticity (tensile strength up to 4-7 MPa), flame retardant rating Class 1, low bulk density. These indicators are not marketing talk—they are facts you can verify yourself through sample testing. We are happy to send free samples so that, before making a purchasing decision, you can confirm with your own hands and judgment whether it suits your project.

If you are looking for an EPDM granule for your next project that offers stable color, strong climate adaptability, and custom production to your specifications, welcome to contact us for RAL 7037 samples and a customization plan. Tell us your application scenario, target particle size, and estimated quantity, and we will provide corresponding specification recommendations and a quotation.

WOW(LYG) New Material Co Ltd is a manufacturer specializing in the production of EPDM 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.