One of the questions we get asked regularly at Macclandscapes is: “What’s the best filler for block paving?” Whether you’re laying a new driveway or maintaining an old one, choosing the right jointing compound can make a big difference to how long it lasts—and how it looks.
In this blog, I’ll explain what to look for in a good block paving filler, the key issues to avoid, and why we often recommend Nexus ProJoint PolySweep for its ease of use and long-lasting results.
What Should a Good Filler Do?
When we talk about “filler” in block paving, we’re really referring to a jointing compound or sand that locks the blocks together and keeps weeds, water, and movement under control. The best filler needs to:
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Stay in place under pressure washing and weather
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Resist weed growth and algae
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Handle frost and temperature changes
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Set firm, without crumbling or washing out
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Be easy to apply—especially for DIY use
Traditional kiln-dried sand works for a while, but we’ve found it often blows out in high winds or washes away after heavy rain. That’s why we’ve moved towards more advanced products like PolySweep.
Why We Recommend Nexus ProJoint PolySweep
We’ve tried various fillers over the years, and Nexus ProJoint PolySweep is one we really trust for block paving. It’s a pre-mixed, brush-in jointing sand that sets hard and stays put. Whether we’re working on block driveways, concrete paths, or natural stone patios, it ticks all the boxes.
Here’s what makes it stand out:
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Superior strength – Once cured, it forms a solid joint that won’t crack or break
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No Portland cement – That means fewer stains and better long-term performance
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Clear Set technology – It’s stain-resistant and clean to work with
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Weed, frost, and pressure washer resistant – Holds up in all seasons
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Easy to use – Just brush it in and water it down—no need for mixing or specialist tools
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Fits narrow and wide joints – Works from 1mm up to 10mm wide, and 20–100mm deep
We’ve used it on several projects in and around Macclesfield, and it’s consistently delivered great results.
How to Use ProJoint PolySweep
If you’re doing it yourself, here’s a quick breakdown of how we apply PolySweep on a typical block paving job:
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Ensure the surface is clean and dry – Sweep away any dust, debris, or moss
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Pour the PolySweep onto the surface – Spread it out across the paving
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Brush into the joints – Use a soft broom and make sure all gaps are filled
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Compact and top-up – Gently compact the area and refill any low spots
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Water in with a fine spray – This activates the binder and begins the curing process
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Let it dry – Leave it to cure fully before driving or walking on the area
It’s a straightforward process, and most DIYers will have no trouble getting it right. We used this product in the below transformation video! Check it out!
Coverage Guide
One of the things I like about PolySweep is that a little goes a long way. A 20kg bag covers different amounts depending on your paving size and joint width. Here's a rough idea:
For 200 x 100mm block pavers:
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Joint size 2 x 50mm: approx. 9.3m²
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Joint size 5 x 20mm: approx. 9.3m²
For 600 x 900mm pavers:
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Joint size 2 x 50mm: approx. 50m²
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Joint size 5 x 20mm: approx. 50m²
These figures help when estimating how much you’ll need before you start the job.
Colour Options and Appearance
PolySweep comes in two colour options:
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Neutral Buff – Great for sandy or warm-toned pavers
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Silver Grey – Ideal for granite or cool-toned blocks
We usually match the colour to the paving to keep the joints subtle and clean-looking. It’s a small detail, but it really helps finish the look properly.
Things to Avoid
To get the best from any filler, you’ll want to avoid a few common mistakes:
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Don’t apply to wet paving – Always work on a dry surface to avoid clumping or uneven setting
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Avoid heavy rain right after installation – It can wash the binder out before it sets
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Don’t over-wet when activating – Use a fine spray rather than soaking the surface
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Keep the area free from foot traffic while curing – Let it harden fully before use
If you're unsure whether it's the right time to apply, we’re happy to give you a hand. Just contact us here and we’ll help you plan it right.
Why We Like PolySweep for Block Paving
We’ve chosen Nexus ProJoint PolySweep for several local projects because it’s fast, effective, and looks great once cured. For homeowners who want to do it themselves, it’s one of the most user-friendly options we’ve come across.
It holds up against everything the British weather throws at it—frost, rain, weeds, and power washing. If you’re tired of brushing in sand every few months, switching to a product like PolySweep can make a real difference.
Need help with paving or maintenance?
We offer full block paving installation, repair, and cleaning services across Macclesfield and surrounding areas. If you’re not sure where to start or want a pro to handle it for you, contact us here for a no-obligation quote.
More practical advice from Macclandscapes: