Faux Grass Infill (2026): Silica, Zeolite, Coated Sand and Rubber Compared, Plus the 5 Best
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Infill is the part of a faux lawn you don't see, but it decides how upright, heavy, cool and fresh-smelling the turf stays.
Infill is the granular layer brushed down into turf, between the blades. It holds the blades upright, adds weight so the turf stays flat, and shields the backing from sun. Some types do more: trapping pet odour, resisting bacteria or staying cooler in sun. Pick the wrong one, and you get a lawn that smells, compacts or burns bare feet. Pick the right one, and most people never think about it again.
So this guide covers what infill does, the six main types, which to use for your lawn, how much you need and five good options. Sand is heavy and rarely sold on Amazon, so four picks come from Synthetic Grass Warehouse (SGW).
What does infill do, and do you need it?
Most landscape turf needs infill; some pet and balcony turf is built to go without. Infill does four jobs:
- Holds blades upright. Sand between the blades props them up, so the lawn looks full instead of flat.
- Weighs the turf down. Infill adds ballast, which stops turf from shifting, wrinkling or lifting at the edges.
- Protects the backing. It shades the backing from UV, which helps it last longer.
- Helps drainage. Well-graded infill lets water flow down through the turf to the base.
Do you need infill for artificial grass? For most lawn turf, yes, and many turf makers require it for the warranty. But some turf is designed infill-free. Some pet systems, like K9Grass, are built to work without it. Short balcony and deck turf often needs none. Check your turf's instructions. See faux grass for balconies.
What happens without infill? On turf designed for infill, blades lie flat faster, the turf can wrinkle and shift, and the backing wears sooner.
What are the types of faux grass infill?
Six infill types cover nearly every lawn, pet area and sports field.
| Type | What it is | Strengths | Weaknesses | Best for |
|---|---|---|---|---|
| Washed silica sand | Natural quartz sand, washed and graded | Cheap, common, drains well | Can compact when wet; holds heat (NexGen) | Everyday lawns |
| Kiln-dried or fine silica | Fine, dry, graded sand | Flows evenly into short turf | Not for odour control | Putting greens |
| Coated sand | Sand with a polymer or acrylic coating | Smoother, less abrasive; some resist bacteria | Costs more | Lawns, pets, play |
| Zeolite | Porous volcanic mineral | Traps ammonia from pet urine | Quality varies; works best dry | Dog areas |
| Crumb rubber | Ground recycled tyres | Cushion for sports | Gets hot; health questions raised | Sports fields |
| Organic | Cork, coconut fibre and similar | Cooler surface | Costly; breaks down; mostly sports | Sports fields |
What's the best infill for artificial grass? There's no single best. Washed silica suits most lawns. Zeolite suits dogs. Coated sand suits buyers who want smoother, cleaner infill and will pay more.
Is silica sand good infill? Yes, it's the most common for a reason. NexGen Lawns notes it can compact when wet and holds heat, so it isn't the best for hot climates or pets.
What is zeolite infill? A porous mineral that absorbs ammonium from urine before it turns into ammonia, the main source of pet smell. Heavenly Greens points out that zeolite products differ, partly in quartz content. Ask the seller for a spec sheet. For more, see our silica vs zeolite comparison.
Is rubber infill safe? It's widely used on sports fields, but it gets hot in sun and has faced health questions. Most homeowners choose sand-based infill instead.
Which infill for your use?
Match the infill to who uses the lawn.
| Use | Recommended infill | Why |
|---|---|---|
| Decorative lawn | Washed or round silica | Cheap, drains, holds blades up |
| Dogs | Zeolite layer under silica, or coated sand | Traps odour; coated sand resists bacteria |
| Putting greens | Fine silica | Flows into short, dense turf; gives an even roll |
| Hot climates | Coated or cooling infill | Lighter-coloured coatings stay cooler than dark rubber |
| Kids' play | Coated sand | Smoother, less dusty |
| Sports | Rubber or organic | Cushion and grip |
For hot climates, see faux grass for hot climates. For putting greens, see faux grass for putting greens.
How much infill do you need?
Most lawns take one to two pounds per square foot; check your turf's spec.
The formula: square feet × pounds per square foot = total pounds. Then divide by bag size to get the number of bags.
| Turf type | Typical infill rate | Example: 300 sq ft lawn |
|---|---|---|
| Residential lawn | 1 to 2 lb per sq ft | 300 to 600 lb, or 6 to 12 bags of 50 lb |
| Dog area | 1 to 2 lb per sq ft, often split between zeolite and silica | Similar total, split by layer |
| Putting or chipping turf | Higher; one maker lists 5 to 6 lb per sq ft for chipping turf | 1,500 to 1,800 lb |
These are typical ranges. Taller, denser turf takes more infill, and short turf takes less. Your turf maker usually states an exact rate, so follow that. Use our cost calculator to turn bags into a budget.
The 5 best faux grass infills
One infill for each common job.
1. Zeofill Odor Infill — Best Infill for Pets
Type: zeolite | Size: 40 lb bag
Dog urine smell is the most common turf complaint. Zeolite is the infill built to fix it.
Zeofill says its zeolite absorbs the ammonium in dog urine before it turns into ammonia gas. It sits in the infill layer, right where urine residue collects, so it works where the smell starts. Heavenly Greens describes ZeoFill as sifted. It's the only infill here sold on Amazon.
Still, one rule matters: Zeofill's listing says it works best dry and advises against constantly washing it with plain water. So spot-clean rather than hosing daily.
But it costs more than silica and needs topping up over time. Many installers lay zeolite first, then silica on top.
Our take: from our hands-on work with artificial grass, odour is the problem that quietly ruins turf around pets; a zeolite layer is cheap insurance compared with replacing a smelly section.
Check price on Amazon · Read our ZeoFill review
2. SGW Round Premium Silica — Best Everyday Silica Infill
Type: natural quartz sand | Colour: natural brown | Finish: double washed and screened (seller) | Size: 50 lb bags | Sold by: SGW (non-affiliate)
For a normal lawn, good silica is all you need. This one is made for turf.
SGW says its Round Premium Silica is double washed to prevent dust and screened for an even grain size. The round grain shape matters: rounded grains roll against each other instead of locking together, so they're gentler on the blades. SGW says this means less wear and tear. The natural brown colour also blends with turf thatch, so it doesn't show between blades.
It comes in easy-to-handle 50 lb bags.
But plain silica doesn't control pet odour, and it can hold heat. For dogs, layer it over #1.
Our take: in our experience, brown sand disappears into the thatch while pale sand shows between the blades in photos, so colour matters more than most buyers expect.
View Round Premium Silica at SGW
3. Envirofill — Best Coated, Cooler Infill
Type: coated sand with a rounded quartz core | Colour: green | Sold by: SGW (non-affiliate)
Coated infill costs more, but it does more than hold blades up.
Envirofill is sand from the Hickory Formation of central Texas with a green coating. SGW says its highly rounded quartz core resists compression, so it doesn't keep compacting over the life of the lawn, which helps drainage. SGW also says the coating is non-absorbent and prevents bacteria growth, and that the green granules stay cooler under sun than black crumb rubber. And it's sold as a one-time application.
That makes it a strong all-round pick for families and pets.
But the comparison is with black rubber, not plain sand, and coated sand costs much more than silica. See our Zeofill vs Envirofill comparison.
Our take: from working with turf in full sun, green-coated granules blend in with the blades instead of showing as grit, which helps a lawn look real up close.
4. SGW Silica Sand #16 and #60 — Best Infill for Putting Greens
Type: silica sand | Grades: #16 and #60 | Claims: resists compaction and moisture absorption (seller) | Sold by: SGW (non-affiliate)
Putting turf is short and dense, so it needs fine sand that flows evenly between the fibres.
SGW sells this silica in two grades, #16 and #60. The number is the sieve size, so the higher number is the finer sand. Fine sand settles into short putting turf and helps give an even roll. SGW says the mix of round and sub-round grains resists compaction and fracturing, and that the sand resists moisture absorption.
Ask SGW which grade your putting turf needs before you order.
But plain silica does nothing for odour. Keep it for greens, not dog runs. See faux grass for putting greens.
Our take: in our hands-on experience with short-pile turf, coarse sand sits on top and looks gritty; fine sand is what actually settles in and keeps the surface smooth.
5. CleanFill — Best Antimicrobial Infill
Type: silicon dioxide with a polymeric coating | Feature: antimicrobial protection (seller) | Uses: pet turf, lawns, playgrounds, putting greens | Sold by: SGW (non-affiliate)
Bacteria cause odour, stains and discolouration in turf. CleanFill is designed to slow them down.
SGW describes CleanFill as high-purity silicon dioxide with a polymeric coating that helps reduce the growth of bacteria and other microbes. The rounded particles support the blades, and SGW says it's low dust, non-toxic and made in the USA. It's labelled for pet turf, lawns, playgrounds and putting greens, so it covers more jobs than any other pick here.
But "antimicrobial" means it slows microbes, not that it cleans or disinfects the turf. You still need to pick up waste and rinse. See our disinfectant guide.
Our take: from our hands-on work with turf in busy spaces, a coated infill buys you time between cleans, but it never replaces a regular rinse.
Rubber crumb infill is sold on Amazon, but the listings we found had very little buyer feedback. Organic infills like cork and coconut are mostly sold to sports field contractors, not homeowners.
How do you apply infill?
Spread in thin passes and brush between each one. Here's how:
- Make sure the turf is dry. Wet blades catch sand and clump it on top.
- Brush the blades up first. A power broom or stiff brush lifts the pile, so infill can fall between the blades.
- Use a drop spreader. Set it to a low rate. A drop spreader puts down an even layer. Throwing sand by hand leaves piles.
- Spread in thin passes. Do several light passes rather than one heavy one. Go in different directions.
- Brush between passes. Brush the infill down into the turf after each pass, against the grain. See our power broom guide.
- Rinse lightly. A gentle rinse settles the infill. Skip this on zeolite.
How do you spread infill evenly? Use a drop spreader on a low setting and make many thin passes. Weighing out bags per section helps too: if a section is 100 sq ft and your rate is 1.5 lb, spread 150 lb there.
Ready to install? See the full faux grass installation guide.