What’s the Best Thing to Put in Between Pavers?
The short answer: it depends on your needs. For most patios and walkways, polymeric sand is the top choice. It locks the pavers in place, resists weeds, and stays put through rain and wind.
If you want a more natural or flexible look, for example, in a garden path, pea gravel or jointing sand can work well too. Each option has pros and cons, so it helps to understand how they behave in real outdoor conditions.
What Is the Best Material to Put Between Pavers?
Let’s look at the most common choices:
- Polymeric Sand:
A fine sand mixed with special binders that harden when wet. It creates a durable, weed-resistant surface that holds pavers tightly. - Jointing Sand (Plain Sand):
The traditional choice. It fills gaps well but washes out over time, so you’ll need to top it up every few years. - Pea Gravel:
Great for rustic or decorative patios. It drains well and looks natural, but it doesn’t lock pavers in place. - Stone Dust or Crushed Fines:
Used mainly under the pavers, not between them, because it can trap moisture and cause shifting.
If you want long-term stability and minimal maintenance, polymeric sand wins almost every time.
What to Fill Gaps in Pavers With
For standard paver patios, polymeric sand is the go-to filler. It prevents weeds, deters ants, and keeps the surface smooth.
If you’re after a softer or more natural look, you can use fine gravel between wider gaps. Just remember that gravel can move around, so it needs to be topped up occasionally.
Is There Anything Better Than Polymeric Sand for Pavers?
Some people prefer resin-based joint compounds or permeable joint fillers, especially in areas with heavy rain. These are newer products that stay flexible instead of hardening completely.
They cost more than polymeric sand but can handle movement better in climates with lots of expansion and contraction.
For most California homes, though, polymeric sand is still the most reliable choice.
How Long Will Polymeric Sand Last?
When installed correctly, polymeric sand lasts about 5 to 10 years. Its lifespan depends on how well the base is compacted, how much water exposure it gets, and whether the surface is sealed.
How to Keep Gravel in Place Between Pavers?
If you’re using gravel or small stones between pavers, here’s how to keep them from shifting:
- Compact the gravel tightly after pouring.
- Use edging to contain it on all sides.
- Choose angular gravel instead of rounded stones, it locks together better.
- Add a stabilizing grid beneath the pavers if needed.
How Often Do You Need to Replace Polymeric Sand?
Typically, every 7 to 10 years. You’ll know it’s time when the joints start crumbling or weeds begin growing again. Proper sealing and occasional cleaning can help it last longer.
Can You Put New Polymeric Sand Over Old Polymeric Sand?
Not really. Polymeric sand needs to bond directly to the paver edges to work properly. If you apply new sand over old, it won’t set right.
Before adding more, remove the old sand with a pressure washer or joint cleaning tool, let the area dry completely, then apply a fresh layer.
Does Water Drain Through Polymeric Sand?
Yes, but only slowly. Polymeric sand is semi-permeable; it allows some water to drain, but not as freely as plain sand or gravel. That’s part of why it’s so effective at resisting erosion.
If you want faster drainage, you can look into permeable joint materials that allow more water flow.
Why Is Polymeric Sand Not Used in Florida?
In humid or rainy climates like Florida, polymeric sand can stay too moist and fail to harden properly. It may wash out or leave a sticky residue on the pavers.
In California, though especially in Daly City’s coastal climate, polymeric sand performs well because rainfall is moderate and seasonal.
How Do You Fill Gaps Between Block Pavers or Concrete Pavers?
The process is simple:
- Clean out the gaps thoroughly.
- Pour polymeric sand or jointing sand over the surface.
- Sweep it into the joints with a broom.
- Compact gently with a plate compactor or rubber mallet.
- Mist the surface lightly with water to activate the binding agents.
Let it dry for at least 24 hours before walking on it.
Is It Worth Sealing Block Paving?
Absolutely. Sealing pavers protects the surface from stains, fading, and weed growth. It also strengthens the bond between the sand and the pavers, making polymeric sand last longer.
A good sealant should be applied every 3–5 years, depending on wear and exposure.
What Is the Downside to Polymeric Sand?
While it’s the best option for most situations, polymeric sand does have a few drawbacks:
- It can leave a white haze if not installed correctly.
- It doesn’t work well in constant moisture or heavy shade.
- It costs more than regular sand.
Still, when installed right, these issues are minimal compared to the benefits.
Is There a Downside to Sealing Pavers?
The only real downside is cost and maintenance. Sealants wear down over time and need reapplication. If not done properly, they can create a slippery surface or trap moisture.
Professional sealing ensures even coverage and the correct finish for your paver type, matte, natural, or glossy.
Is Polymeric Sand Necessary for Pavers?
For most projects, yes. Polymeric sand prevents joint erosion, resists weeds, and keeps the pavers locked tight. It’s especially useful for driveways and patios where stability matters.
You can skip it for looser, decorative garden paths or stepping-stone areas, but for structural paver surfaces, it’s worth every penny.
When Should You Not Use Polymeric Sand?
Avoid it if:
- You’re working in areas with constant standing water.
- The pavers are irregular natural stones with very wide joints.
- The surface slopes sharply and will wash out easily.
In those cases, gravel or crushed stone might perform better.
What Can I Use Instead of Polymeric Sand for Pavers?
Alternatives include:
- Jointing sand: Inexpensive, easy to install, but needs frequent refilling.
- Pea gravel: Natural look, good drainage, low strength.
- Resin-based fillers: High-end option that stays flexible.
Each has its place; it depends on the project type and the look you want.
What Is the Best Product to Seal Pavers?
For California homeowners, a breathable, UV-resistant paver sealer works best. It protects from sun damage, mold, and moisture while allowing the surface to breathe.
Always clean and dry the pavers thoroughly before applying any sealant, and use a sprayer or roller for even coverage.
Final Thoughts
Knowing what to put in between pavers makes all the difference in how your patio or walkway performs over time. Whether you go with polymeric sand, gravel, or another filler, the key is professional installation and regular maintenance.
If you want a durable, low-maintenance surface that stays beautiful for years, polymeric sand paired with proper sealing is the way to go.
For expert paver installation, cleaning, and repair in Daly City and the greater Bay Area, contact the professionals at Glscapes Inc.
📍 Address: 455 Eastmoor Ave, Daly City, CA, United States
📞 Phone: +1 415-419-1937
🌐 Website: www.glscapesinc.com
Let’s make your outdoor space look stunning from the pavers down to the last grain of sand.