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Frequently Asked Questions about Prismi Rubber Granules

Prismi has been manufacturing recycled rubber granules in Italy since 1990 for eight sports, landscaping and construction applications. This page answers the most common questions about ordering, using and maintaining each product range. For technical specifications, see the dedicated product pages or contact us directly at +39 (0735) 70 50 19.

FAQ | Ecolsport: rubber infill for synthetic football and sports pitches

Yes. By purchasing one of the refill artificial grass products packed in 25 kg / each bags from our e-shop, you can refill any type of sports field for both football and multipurpose.

It can be done in several ways: use a spreading hopper with an opening adjustment flag that you can easily find on the market, or open the 25 kg sack and dividing it into buckets and manually as you do for sowing, sprinkle it on synthetic grass.

Using a hard bristle brush, brush the synthetic carpet alternately back and forth until you get the desired effect.

Check the residual height of the fiber on average over the entire synthetic field. Example: if the Fiber escapes by an average of 25 mm, the quantity necessary for 15 mm is calculated (the remaining 10 mm will be the hair of grass that comes out); 15mm x 0.5 kg / mmh * m2 = 7.5 kg / m2.

Unfortunately, the mistake of buying a product without knowing the maintenance costs is paid dearly. Here is the solution! Refill your soccer or football field with our Ecolbrown product; The field will return to performance with excellent elasticity and low maintenance.

Prismi has the solution! Find among our refill products the REFILLER product in different colors to allow you to infill your field with crushed fibers with ease.

The color choice depends on your synthetic carpet: Ecolgreen matches standard green fiber pitches; Ecolbrown integrates perfectly with indoor pitches with brown-tinted fibers; Ecolmix provides a multicolor natural-effect blend. For bi-color pitches (alternating green and brown fibers) you can blend the two colors in equal parts. Refiller is designed for pitches where fibers are severely flattened and standard infill can no longer penetrate: its finer granulometry fills even compressed fibers. Contact us with your pitch type for a specific recommendation.

Yes. Ecolsport granules are used for both full-size 11-a-side pitches (50–65 mm fibers) and five-a-side and multipurpose pitches (20–35 mm fibers). Full-size pitches require proportionally more infill per m². Ecolsport is certified compliant with FIFA Quality requirements and EN 15304 guidelines for synthetic turf infill. Contact us with your pitch dimensions and fiber type to receive an accurate quantity calculation.

Yes. Prismi sends product samples on request. Write to us via the Contact form stating your pitch type, the color of interest and your location. For small refill orders (25 kg bags) you can buy directly from our online shop. For B2B bulk supply in Big Bags for new pitches or large-scale replacements, contact us directly for a quote.

The Ecolsport range includes both pre-consumer products (industrial production scrap of high purity, such as Ecolgreen UV and Ecolbrown) and ELT (end-of-life tyre) products such as the Classic version. Pre-consumer products have fewer impurities and more consistent granulometry; ELT products are lower in cost and suitable where the technical specification does not require pre-consumer purity. The choice depends on the intended application and any certification required by the facility.

FAQ | Play Rubber: poured-in-place rubber surfacing for playgrounds

Play Rubber granules — both the Top series (finishing layer) and the Underfloor series (substrate) — are sold exclusively on direct quote, not through the online shop. The quantity required depends on the playground surface area, the design thickness and the chosen color. Contact us with the area plan and design specification to receive a tailored offer. Prismi provides technical support to installers during the design phase.

Yes. The Play Rubber system is suitable for both outdoor surfaces (open playgrounds, roundabouts, avenues) and indoor environments where anti-trauma surfacing is required: school gyms, corridors, covered play areas, pediatric medical rooms. For indoor applications, low-VOC indoor polyurethane binders are used for the Play Rubber Top finishing layer. Contact our technical office to assess the laying surface and select the appropriate binder for your indoor project.

Yes. Prismi provides all installers with data sheets including HIC (Head Injury Criterion) values for each Play Rubber granule type and for each combination of Base + Top thickness. Technical support includes the minimum thickness required based on the maximum height of play equipment in the area, in compliance with EN 1177. For certified play areas (public parks, schools) Prismi can also provide documentation for the project supervisor’s technical file.

The Play Rubber Top range offers 11 colors: white, grey (SBR and EPDM UV), yellow, orange, red, brown, green, blue, multicolor mix and black UV. Playgrounds with different color zones, geometric paving patterns, chromatic paths and logos can all be created — by combining colored Runner granules in the desired areas. Each zone is laid separately with the specified color and thickness. Prismi supports the designer in defining color zones and preparing the bill of materials by color.

FAQ | Athletic Track: NR/SBR rubber granules for poured-in-place running tracks

The Athletic Track range — Runner Red, Blue, Green and Underfloor Closed — is primarily aimed at installers, sports contractors and athletic facility managers. It is not available in small quantities through the online shop. Prismi supplies directly or through its installer network for new tracks, existing track resurfacing and partial repairs. Contact us with your track plan and technical specifications to receive an offer and technical documentation.

Yes. Runner granules (Red, Blue, Green) are produced from pre-consumer secondary NR/SBR raw materials — eco-sustainable alternatives to virgin EPDM with a significant CO₂ reduction compared to virgin granule production. This characteristic can contribute to material credits in green building certification systems (LEED, BREEAM) and to GPP (Green Public Procurement) requirements in public procurement specifications for athletic facilities. Prismi provides material origin documentation on request for certification purposes.

Yes. Athletic Track granules can be used for partial restoration of existing tracks damaged or worn in specific zones — for example the 100 m straight or the bends. In these cases it is important to match the local repair color to the existing track color for visual continuity. Prismi provides color samples on request before the order. Contact our technical office with photographs of the zones to be restored for a preliminary assessment.

Total track thickness is defined during the design phase and depends on the technical specifications required. The Athletic Track system typically uses an Underfloor Closed base layer (10–13 mm) and a Runner colored finishing layer (5–10 mm), for a total of approximately 13–25 mm. The standard quantity for both products is 6.0 kg/m² per 10 mm of depth. For World Athletics certified facilities, the specification is set by the certifying body. Prismi supports the designer in dimensioning the system.

FAQ | Tennis Court: SBR rubber infill for synthetic tennis and padel courts

Obviously yes! Just load our Rubber Sand rubber in different colors and the result will live up to expectations: excellent for tennis and mini soccer!

The quantity depends on the infill depth to be achieved. Standard Rubber Sand requirement is 4.5 kg/m² per 10 mm of depth. A standard padel court measures approximately 200 m²: at 10 mm infill depth, approximately 900 kg of product is required. To assess the required depth, measure the emerging fiber height: the rubber should reach 10 mm below the fiber tip, leaving the top 5–8 mm of green pile exposed. Contact us with your measurement for an accurate calculation.

Yes, but with one operational note: the existing silica sand infill does not necessarily need to be completely removed. Rubber Sand can be added on top of the existing sand, provided the fibers still have sufficient free height to accept new infill. If fibers are flattened by the sand and cannot be lifted back by brushing, partial mechanical removal of the existing sand is advisable before integrating Rubber Sand. Contact our technical office for an assessment of your specific pitch.

Yes. Rubber Sand Tennis Court — in red, blue and green — is suitable for any sports pitch with short-pile synthetic carpet: tennis courts, padel courts, multipurpose tennis-football courts, beach soccer and multi-sport areas. It does not heat up like silica sand under sunlight, providing better playing conditions for all sports on the same surface. For five-a-side pitches with taller synthetic pile (35–65 mm), the Ecolsport range is more appropriate.

Yes. Prismi provides all facility managers with technical support for the correct application of Rubber Sand on padel and tennis courts. Support includes: quantity calculation for the court surface area, infill depth recommendations based on the carpet type, and granulometry verification before purchase. For first-time buyers, a free sample is available for testing on your own court before placing a full order.

FAQ | Bowls Court: rubber spreading material for synthetic resin bowls greens

The dusting of our product is almost finished: buy it back in the e-shop with the name Spread rubber in different shades of choice.

If the field is in resin and therefore synthetic, just sprinkle the product as sowing and then brush it with a brush to distribute the product well evenly. Level the whole field.

Replenishment frequency depends on the intensity of use and local climate. For bowling clubs with daily activity (competitions and training every day), replenishment is typically once or twice a year with small quantities to compensate for losses from wear and cleaning. For clubs with weekly or seasonal use, replenishment is less frequent. The practical indicator that replenishment is needed is when bowls start sliding across the resin mat surface again rather than rolling smoothly across the Spread layer.

Yes. Spread Amber, Grey and White is available in our online shop in 25 kg bags — ideal for private bowls greens, recreational clubs and neighborhood associations. For larger clubs or associations with multiple courts, Big Bags of 600 kg and 1,000 kg are available at reduced unit prices. All orders are dispatched from our plant in Monteprandone (AP, Italy) with delivery across Europe. Order directly from the shop: https://www.rubber-granules.com/en/product-category/bowls-court/

Rubber Sand (White, Grey, Amber) for the acrylic resin base mat is not available online as it is a B2B supply intended for installers and contractors. Quantities required for a complete bowls green construction are significant and require a customized quote based on court dimensions and the number of rinks. Contact us with your area measurements and we will provide a full data sheet and a direct-from-manufacturer quotation.

Yes. The Amber tone of the Bowls Court range — in both Rubber Sand 0.5–1.5 mm for the base and Spread 0.3–0.6 mm for the surface dressing — was specifically developed to reproduce the natural sand and red clay color of traditional bowls surfaces. Many clubs transitioning from natural to synthetic surfaces choose the Amber Base + Spread Amber combination to provide their players with visual continuity with the surface they are familiar with, while gaining the benefits of synthetic: reduced maintenance, no mud and consistent surface year-round.

FAQ | Garden Rubber: white and colored rubber bark mulch for gardens and landscaping

Mulch or rather mulching is an agronomic practice with which it is possible to prevent the growth of weeds and, at the same time, isolate the roots from low temperatures and avoid, in the summer months, that the water evaporates too quickly from the soil. There are many types and Prismi offers its bark Garden Rubber mulch solution which has the advantage of being not only decorative than:
Don’t attract insects, including termites.
• Saves time and money by eliminating annual mulch.
• Prevents the emergence of weeds.
• Provides a safety playground by reducing the risk of injury from falls.

Use a non-woven polyester (PET) sheet that constantly guarantees the right degree of progressive and gradual humidity to the soil. The root system, even in the presence of strong and sudden temperature changes, severe frost and other adverse climatic conditions, remains constantly well protected even for the most sensitive and delicate plant species.
To obtain long-lasting results, it is essential to carefully clean the ground before laying, and then to weed.
1. The irrigation system can be positioned both below and above the sheet, even if the underlying laying, in addition to ensuring a better aesthetic result, protects the pipes from the action of ultraviolet rays.
2. The sheets must be unrolled on the ground without pulling them.
3. For cutting, use scissors capable of making precise and rapid cuts. Even a simple cutter is well suited for this purpose.
4. The fixing to the ground takes place with the special shaped pegs which, in addition to penetrating the ground effortlessly, thanks to the resistant alloy and the very sharp diagonal cut, also allow the dripping wing to be fixed with a single operation.
5. The fixing of the sheet with water-resistant silicone on the overlays and edges (critical part for weeds) allows to further optimize the seal even in case of very strong gusts of wind.
6. After cutting and fixing the sheet you can proceed with the positioning of the plants making holes as precise as possible where necessary.
7. Sprinkle our Garden Rubber in a thickness of not less than 4 cm in the color you prefer and you will obtain a magnificent result.

Garden Rubber in-mass colored granules — including Garden White with 95% light stability — have color distributed throughout the entire granule cross-section. Even after years of intense sun exposure, the gradual surface wear of the granule does not expose an uncolored core, unlike surface-coated recycled tyre granules. Prismi guarantees Garden Rubber against chromatic degradation for 25 years. For the most UV-intensive applications (south-facing unshaded beds), we recommend Garden White UV or Garden Mix which use in-mass EPDM granules with the highest light stability in the range.

Yes. Garden Rubber mulch is tested for use in play areas compliant with ASTM HIC fall height requirements, making it suitable for the border zone between decorative beds and play areas in private gardens. The material is sterile, PAH-compliant (Polycyclic Aromatic Hydrocarbons), emits no harmful VOCs and contains no steel wire — properties verified by periodic analysis on every production batch. An accredited external laboratory PAH analysis certificate is available on request for a small fee.

Yes. Many professional and private gardens use multiple Garden Rubber colors in the same area to create differentiated decorative effects: Garden Brown (natural look) as border edging, Garden White (modern look) as central bed fill, or Garden Black (minimalist look) as path surfacing. The consistent density of the granules (1.18 g/cm³) ensures that different colors do not separate by weight during rainfall or wind. The 25 kg bags available online allow you to test color combinations before ordering larger quantities.

No. Unlike natural wood bark, Garden Rubber granules have a density of 1.18 g/cm³ and sink in water: they do not float in rain and are not washed into drains during heavy downpours. This is one of the most valued practical advantages over organic bark mulch, which must be replenished after each heavy rainfall to compensate for losses. Garden Rubber granules stay in the bed even during heavy precipitation, eliminating the problem of drain blockage that affects flower beds along roads and public roundabouts.

FAQ | Horse Track: EPDM rubber granules for riding arenas, training tracks and hippodromes

Yes. Underfloor Hybrid Mix UV (2–6 mm) and Underfloor Open Mix UV (6–12 mm) granules blend with standard silica sand — the most widely used footing sand in equestrian facilities. The standard dosage is 20% by weight relative to the existing sand. Compatibility has been verified with footings of various sand granulometries. For footings with very fine or clay-mixed sand, contact our technical office for a preliminary assessment before proceeding with blending.

Arena and hippodrome managers who have adopted the Prismi Horse Track system report improvements in three areas: reduced limb injuries (particularly tendons and ligaments) due to reduced impact stress at each footstrike; better elastic response of the surface with more consistent bounce; and maintained operational continuity during rainfall due to drainage channels preserved by the rubber granule structure. The system has been tested at official Italian trotting hippodromes for racing in wet conditions.

Yes, but significantly less frequently than sand. EPDM Horse Track granules do not compact, disperse or degrade like silica sand. The main loss occurs through mechanical displacement during harrowing and intensive trafficking at arena edges. Prismi recommends a rubber/sand ratio check after the first 12 months of use and an optional top-up of 5–10% of the original quantity. Replenishment is carried out by spreading the granule evenly and blending it back in by harrowing.

Horse Track treatment cost depends on the arena surface area and the depth of the existing sand footing — which determines the volume of granule to add at 20% by weight. Prismi does not have a fixed price list for this application: quotes are prepared individually for each facility based on dimensions and delivery logistics. Contact us with the surface area (m²) and approximate footing depth of your arena to receive a personalized quote with delivery from our plant in Monteprandone (AP, Italy).

FAQ | Building Insulation: SBR rubber acoustic insulation for construction

Yes. Both products are designed for in-situ application, in both new construction and building renovation. Wallsafe 0515 can be sprayed onto existing walls — including brick, concrete and stone surfaces — and can be injected into existing hollow double-wall cavities. Floorsafe 1035 is blended with sand and cement in a new screed or sub-screed, conforming to any irregularity in the existing slab surface. Both systems were used in the L’Aquila post-earthquake reconstruction project in 2009.

Building Insulation (Wallsafe 0515 and Floorsafe 1035) is a professional product aimed primarily at construction contractors, specialist installers and specifiers. It is not available in the online shop in small quantities. Private customers wishing to use the product in their home are invited to contact us to be connected with a qualified installer in their area, or to receive the data sheets to hand to their contractor. We also provide technical documentation for project specifications.

Yes. After encapsulation in cement (Wallsafe) or sand-cement (Floorsafe), the composite structure develops fire resistance properties that exceed those of the rubber granule alone, as the cement matrix acts as a thermal barrier. This makes Building Insulation products suitable for use in residential and civil buildings where fire protection regulations impose resistance requirements for partition walls and floor slabs. Prismi provides the data sheets with the physical parameters required for the fire performance calculations performed by the project’s fire safety consultant.

Building Insulation offers specific advantages over pre-formed acoustic insulation panels in certain applications: perfect adaptation to irregular geometries (columns, corners, raised service channels) without cutting and without acoustic bridges at joints; faster application over large continuous surfaces with mechanical spray (Wallsafe); competitive material cost compared to industrial solutions of equivalent acoustic class; dual acoustic + fire resistance function after cement encapsulation. For regular geometries in new construction, pre-formed panels remain competitive. For complex geometries and retrofit projects, Building Insulation is often the most practical and cost-effective solution.