Rubber Granules for Poured-in-Place Athletic Running Tracks | Eco-Sustainable SBR Alternative to Virgin EPDM | Athletic Track

Prismi Runner granules (Red, Blue, Green) are produced from secondary NR/SBR rubber raw materials — industrial production waste coated with light-stable pigments — and represent an eco-sustainable alternative to first-grade virgin EPDM. Technical performance is equivalent: 1–4 mm particle size, 60–63 Shore A hardness, light stability up to 95%, abrasion resistance up to 97%. The key advantage is a significant reduction in CO₂ footprint compared to virgin EPDM production, at equivalent finished track quality. This makes Athletic Track granules suitable for projects with sustainability certification requirements (LEED, BREEAM, GPP).

Underfloor Closed is the black in-mass NR/SBR granule that forms the elastic substrate of the running track. With a lower hardness (50–55 Shore A) than the Runner finishing layer (60–63 Shore A), it absorbs the impact energy from the athlete’s footstrike, reducing joint loading on knees and ankles. It is laid first with polyurethane binder, then covered by the chosen Runner color as the visible surface. Produced predominantly from recycled truck tyres with 1–4 mm particle size and a standard quantity of 6.0 kg/m² per 10 mm of depth.

The standard quantity for both Athletic Track products — Underfloor Closed and Runner — is 6.0 kg per m² per 10 mm of depth (±10%). Total track thickness is defined during the design phase according to the project specifications (e.g., World Athletics certification requirements for accredited facilities). Typical specifications call for 10–13 mm for the base layer and 5–10 mm for the finishing layer. Contact us with your track dimensions and layout to receive an exact quantity calculation per zone.

Runner and Underfloor Closed granules are produced with particle size analysed periodically per EN 933-1 and from secondary raw materials with impurities below 0.001–0.01% by weight. Compliance with World Athletics (formerly IAAF) technical requirements for certified tracks depends on the complete installation system — granules, polyurethane binder, layer thicknesses and sub-base preparation — which is defined by the installer during the design phase. Prismi provides complete technical data sheets with all physical parameters required for project technical documentation.

Yes. The Runner range covers three colors, red, blue and green, which can be combined on the same track to create two-tone or color-zoned surfaces: for example, red for the running lanes and blue or green for jump or throw areas. Color differentiation also serves a functional role in visually demarcating the different zones of the facility. Each zone is treated separately with the relevant Runner granule and polyurethane binder. Contact our technical office for a zone-by-zone layout plan and quantity calculation.