Artificial Turf Infill Types and How to Choose the Right One

This guide is for homeowners and installers choosing infill for a new install or a top-up. By the end you will know what each infill type does well, what it costs, where it fails, and which one fits your yard, pets and climate.

What does infill actually do in artificial turf?

Infill is the granular material brushed down between the fibers. It looks like an afterthought, but it does five separate jobs, and most product problems trace back to one of them being skipped or done with the wrong material.

• Ballast: the weight holds the turf flat so it does not wrinkle, shift or lift at seams as the backing expands in heat.
• Fiber support: grains packed around the base of each blade keep it upright, which slows matting in traffic lanes.
• Cushioning: resilient infills (rubber, TPE, cork) add shock absorption; sand adds firmness instead.
• Heat management: infill shades the backing from UV, and some infills (wet coated sand, organic material) can lower surface temperature for a while.
• Odor control: zeolite and some coated sands hold ammonia from urine so it can be rinsed out later instead of vaporizing.

A sixth, less obvious job is protecting the backing. Sunlight that reaches the primary backing degrades it faster, so a fully infilled lawn usually outlasts the same product left bare.

Master comparison table: every major infill type

The figures below are typical 2026 US ranges for landscape use. Bag prices vary widely by region and freight distance, so treat them as planning numbers.

Organic infills are light, so weight per sq ft is misleading; they are specified by depth or volume. For detailed numbers on any single type, see the dedicated pages on silica sand, coated sand, zeolite, crumb rubber and organic infill.

How do the infill types differ in practice?

Mineral infills: sand and zeolite

Sand is dense (roughly 90 to 100 lbs per cubic foot), cheap and stable, which makes it the default ballast. Its weakness is that plain sand is porous on a microscopic level and holds whatever drains through it. Zeolite is a mineral too, but lighter (around 50 to 60 lbs per cubic foot) and chemically active: it attracts ammonium, which is why pet installers use it. Zeolite alone is rarely enough ballast, so it is typically paired with sand.

Rubber infills: SBR, EPDM and TPE

Rubber granules add bounce and reduce impact forces, which matters on a soccer field or under a climbing structure but not much on a lawn people walk across. They also run hot and are lighter than sand, so they can migrate in heavy rain. SBR is recycled tire rubber, EPDM is a virgin synthetic rubber, and TPE is a thermoplastic elastomer that is often marketed as a cleaner alternative. All three are subject to the EU restriction on intentionally added microplastics for sports surfaces.

Organic infills

Cork, coconut fiber, walnut shell and olive pit infills avoid plastic and, when moist, stay cooler than mineral or rubber options. The tradeoffs are floating and migration in storms, gradual decomposition, freezing into crusts in cold climates, and more frequent top-ups.

Which infill should you choose? Decision rules

Use these rules in order. The first one that matches your situation is usually the right starting point.

1. If dogs urinate on the turf, use a sand base plus zeolite (or a coated sand with odor control) and plan regular rinsing, as described in dog urine and turf.
2. If the area is a sports field or a play area that needs cushioning, use the infill specified by the tested system (often sand plus rubber, TPE or organic), not a homeowner choice.
3. If you want the lowest-maintenance, lowest-cost lawn with no pets, use rounded silica sand or acrylic-coated sand.
4. If heat is the main complaint and you can run a quick rinse before use, consider a cooling coated sand or organic infill, and read our page on turf heat first.
5. If you need to avoid plastic and rubber entirely, choose walnut shell or a sand-plus-organic system and budget for replenishment.
6. If the turf is decorative, low traffic and the manufacturer says infill is optional, you may be able to skip it; see do you need infill.

Our infill scoring framework

To compare options for a specific yard, we use a simple 5-factor score. Rate each factor 1 (poor) to 5 (excellent), weight it by how much it matters to you (1 to 3), and add the products.

These are our editorial ratings for typical residential use, not lab scores. They assume normal rainfall and that infill is installed at the manufacturer's rate.

What most guides get wrong about infill

The common mistake is treating infill as a single choice. Most good residential systems are layered: a dense ballast layer (sand or coated sand) at the bottom, and a functional layer (zeolite, a cooling product or an organic topping) where it does its job. Spending premium-infill money on the ballast layer is waste; skimping on the functional layer in a dog run is a false economy.

The second mistake is ignoring migration. Light infills (rubber, cork, coconut) move in heavy rain and with leaf blowers, piling up at edges and leaving the middle bare. In storm-prone or sloped yards, denser infills are the safer choice, and edges need continuous containment.

How much does infill cost for a typical yard?

For a 500 sq ft lawn at 1.5 lbs per sq ft, you need 750 lbs, or 15 bags of 50 lbs. That is roughly $120 to $225 in plain silica sand, $225 to $450 in coated sand, and more if you layer zeolite on top. Use the infill calculator for your exact square footage, and see how much infill for rates by pile height. Infill is usually a small line item within the total artificial turf cost, which is why choosing correctly matters more than saving a few dollars per bag.

Frequently asked questions

Can I mix different infill types?

Yes, and many installs do. The usual pattern is sand as the base for weight and stability, with zeolite, coated sand or an organic product on top. Avoid mixing very light materials such as cork or rubber into a thin top layer on a slope, because they separate and float during heavy rain. Apply each material in its own passes so you can control the amount, then brush thoroughly so it settles evenly.

Is play sand the same as turf infill sand?

No. Play sand is often fine-grained, not consistently washed and can contain silt and clay that cake, clog drainage holes and cloud when wet. Turf infill sand is washed, kiln-dried, screened to a narrow mesh range such as 16/30 or 20/40, and rounded so it flows into the fibers without abrading them. The price gap is small compared with the cost of fixing a poorly draining lawn.

Which infill is best for hot climates?

No infill makes turf cool in full sun. Plain sand is neutral, rubber is the worst, and cooling coated sands or organic infills reduce temperatures mainly while they hold moisture, which in desert heat may be an hour or two after watering. In hot regions, shade, lighter-colored fibers and a quick rinse before use usually matter more than the infill choice.

Does infill need to be replaced?

Infill is not replaced on a schedule, but it is topped up. Rain, brushing, foot traffic and leaf blowing move small amounts over time, and organic infills decompose. Plan to check depth at least once a year and add material where fibers look floppy or the backing is visible. Zeolite may need refreshing more often in heavy-use dog areas because it saturates.

Will infill track into the house?

Some always does, especially in the first few weeks before it settles and with lighter or larger grains. Tracking drops once the infill sits below the fiber tips, which is the reason for brushing it down well. Coated sands and correctly sized mesh tend to track less than coarse sand or loose organic granules. A doormat at the main entry handles most of the rest.