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The UK’s Best Weed Killer for Block Paving, Driveways & Patios

This review will share the best weed killer for block paving in 2024.

Killing weeds is an endless job. Perennial weeds will always keep coming back, providing there’s somewhere they can plant themselves deeply. The best plan of attack is to kill off tough growth at the root with the top weed killer for paths and drives.

This is a major issue in block paving, as deep-rooted undergrowth can work its way into joints where the sand has eroded and been blasted clear. Believe us. We’ve seen it plenty of times where weeds really take advantage of poor jointing or a lack of sealing!

Roundup’s weed killer is perfect for perennial driveway pests. It’s the easiest to control and apply and soaks deep within hours. Within days, your joints will be spitting out leftovers like no tomorrow; it’s terrific value and safe when dry.

We’ll review the following products, all ideal for block paving patios and driveways:

Our Best Weed Killers for Block Paving

You’ll notice we’ve picked different weed killers based on different categories. You might want a pet-friendly solution, for example.

Or, you might be looking for an industrial weed killer that’ll stop the most terrible offenders from coming back again and again. Whether it’s your patio or your driveway, you’ll need a systemic weed killer that will act quickly – with very little work on your part!

Please keep reading for our complete rundown on the fast-acting weed killers available for you to buy right now.

#1. The Strongest Block Paving Weed Killer – Roundup Weedkiller

Roundup’s Weed killer is a ready-to-use solution with its spray and five litres of great weed-killing action for your block paving. You can blast away for up to ten minutes per spray.

Strongest
Roundup Fast Action Weedkiller Pump 'N Go Ready To Use Spray, 5 Litre

 

It gets right down to the roots, where you’ll want to cut them off. This weed killer dries quickly, doesn’t leave a residue, and will generally start killing off most garden weeds in a few days. When it’s dry, it’s safe for kids and pets. It’s easy on the hands with a single-touch trigger.


#2. Best Coverage – Rootblast 360 Glyphosate Weedkiller 

Rootblast’s 360 Glyphosate Weed killer is a precise and systemic product that’s easy to measure and apply. It’s a formula that you will need to dilute – however, for each litre of product, you’ll get up to 50 litres. It comes with a clear measuring device and protective gloves.

Best Coverage
RootBlast - RootBlast 360 Glyphosate Home Garden Weedkiller - 1L Bottle with Integral Measuring Device Pair - Includes Pair Of gloves - 1L Makes Up to 50L

 

This is a tremendous all-around herbicide that’s not only ideal for killing tougher growers but also to kill brambles, stinging nettles and other unwanted growth. Used carefully, you’ll generally see fantastic results from this professional weed killer in a couple of weeks.


#3. Fast Acting – WeedKil Fast Acting Weed Killer

WeedKil’s Fast Acting Weed Killer provides impressive results within a day of application and is entirely free from glyphosates. This makes it one of the safest choices if you have children or pets running around! However, it’s best to keep them away until completely dried.

Fast Acting
WeedKil Fast Acting Weed Killer 5L - Harmless To Children & Pets Once Dry | Glyphosate Free Weed Killer Extra Strong, All Year Round | Effective Within 24 Hours.

 

This weed killer is made from natural ingredients and is great at getting deep into roots as well as killing off moss. Based on a formula of acetic acid, it’s ideal for taking care of annual and perennial weeds all year round. However, for the top results, you’ll need to start spraying in spring. This fast-acting option also dries within 20 minutes of spraying.


#4. No Dilution Needed – Resolva Ready To Use Weed Killer

Resolva’s Ready To Use Weed Killer is self-described as being ‘Xtra Tough’ – and it’s ideal for quick results on weeds in block paving. You’ll get three litres per bottle, giving you up to 111 square metres of coverage. It’ll target the problem immediately and show great results after 24 hours.

No Dillution Needed
Resolva 20300383 Pro Ready To Use Weed Killer, 3 Litre, Transparent

 

Despite being a chemical biocide, this super-strong weed killer can safely break into your soil as it soaks. It first targets the leaves before deepening into the roots to kill them completely. Ideal for block paving driveways, all you need to do is spray and then leave – one application should impress you, but give it a few days to work down deep.


#5. Commercial Strength – Elixir Gardens Commercial Strength Weed Killer

Elixir Gardens Commercial Strength Weed Killer is ideal for tougher control on an industrial scale. This glyphosate-based weed burner will cover over 3,300 square metres in a two-litre bottle – just over a third of an acre for less than £35.

Commercial Strength
Elixir Gardens 360 g/l Glyphosate Commercial Industrial Strength Weed Killer | Treats up to 3332 sq.m | Concentrated Herbicide/Weedkiller | 2 x 1 Litre Bottle + Measuring Cup & Gloves

 

This will prevent unwanted plants from actively growing within a few weeks. There’s no need to apply again in most cases, and it’ll get rid of common weeds, willow herbs, bindweed, dock leaves, and nettles. Apply cautiously and dilute 24ml per litre of water, as this will burn through.


#6. Great for Japanese Knotweed – Job Done Weedkiller

Job Done’s Weed Killer is an amazing value solution that won’t just start to destroy weeds on impact; it’s great at preventing future growth.

Japanese Knotweed
Job Done 86600141 Tough 3L - Strong Fast Acting Weedkiller for Killing Tough Weeds and Roots - Systemic Garden Weed Killer with 3 Months Protection - Controls Brambles, Nettles and More,Black

 

It’ll give you up to three months of protection in a three-litre bottle. Unlike weed solutions, this will sink deep into the root system within 24 hours and only need reapplication several times a year.

Safe to use on driveways, this impressive solution will eliminate Japanese knotweed, ivy, and broad-leaved weeds growing in undesirable places. It’s better to spray or apply between spring and summer.


#7. Glyphosate Based – Weedol Ultra Tough WeedKiller

Weedol’s Ultra Tough Weed Killer is a fantastic value; unlike others on this list, it arrives in tubes. Generally, you can expect 240 square metres of coverage for less than £12. That should be more than enough to cater to block joints, and a bonus is you won’t have to measure it precisely.

Glyphosate
Weedol Ultra Tough WeedKiller Liquid Concentrate, 6+2 Tubes

 

It’s easy to use with a watering can or general sprayer, and this dilute mix is safe for kids and pets once dry. It’ll soak right into the roots, too, meaning it’s more than just a surface kill. It’s glyphosate-based, which means it’ll do its best to terminate these pests in their tracks.


How Do Weed Killers for Block Paved Driveways & Patios Work?

pouring solution into a bucket

The best weed killers for block paved surfaces will soak deep into your unwanted growths, soaking deep into their roots – to completely kill at the source, and it’s better to head straight for the root system.

However, some formulas, such as contact weed killer, will start burning leaves and protruding elements from above ground. These can be effective but might not resist weed growth in future.

They generally contain chemicals such as glyphosate, which soaks deep into deep-rooted perennial weeds. However, others are chemical-free and safer for the garden, children, and pets. However, these may not always prevent regrowth.

Choosing the Best Weed Killer for Block Paving Drive or Patio

selection of weed killers on a shelf
  • Ease of Use: Choose products that are either straight ‘spray then leave’ or a quick dilute and leave to burn. Remember that some solutions that kill weeds need time and effort. A user-friendly spray bottle might kill most weeds, but check longevity alongside.
  • Chemical Contents: As you can imagine, professional-grade herbicides typically include all sorts of proven chemical treatments, such as glyphosate. These are ideal for eliminating weeds in treated areas but may harm your lawn, other plants, and even pets if you are not careful. Some products kill weeds without strong chemicals and are safer to use.
  • Reputation: Buy from brands you recognise or with strong, positive reviews. Unfortunately, there are some cases where big-selling sprays still don’t prevent annual weeds from coming back. If you want a product that kills weeds quickly and offers long-term protection, read what fellow gardeners and driveway owners say.
  • Method of Attack: Contact products will attack the leaves first and the roots second. You need a systemic solution deep into the roots for long-lasting results and to stop seeing those weeds grow through your block joints. This kills weeds at the source and should slow down their reappearance.

How Do You Make Homemade Weed Killer?

red bottle spraying weeds

Weeds and moss can make a mess of block paving, especially driveways. Wherever there are jointing gaps, weeds grow if you give them half a chance. We recommend regrouting these larger gaps between the pavers and then sealing them, generally. Still, you need a specialist product for drives and patios to remove existing plants quickly.

Is Bleach a Good Weed Killer?

Bleach can destroy weeds if you mix it 1:5 with water and then rinse. You can carefully brush it across affected areas before flushing them clear. It’s pretty effective there and then, but it’ll potentially discolour your blocks. Moreover, it’s hardly the safest solution for surrounding areas, especially if you have children and pets.

Does Vinegar Remove Weeds Effectively?

Vinegar is generally a safe solution for killing weeds and unwanted plants; however, it’s not necessarily the strongest. This is a contact solution, so it won’t always penetrate deep.

It’s very safe; naturally, different vinegar types have different concentrations. Fill a garden sprayer or spray bottle, apply it to the leaves, and let it work magic.

Salt for Tough Weeds?

Salt can be great at killing weeds among paving blocks, as it shouldn’t stain or damage your stone. However, it generally dries out the soil and thus starves plants of water.

Therefore, if you’re careful when mixing three parts of water, it should stop perennials and other weeds from causing havoc. However, it’s not a long-term solution, and it can easily kill other plants in your garden.

Burn Weeds

Weed burners such as blowtorches can help get nasty greens up without chemicals. They’re also a great choice if you’d prefer not to strain your back! There’s no need to bend down and pick up. However, flame weeding comes with fire risks, and you’ll likely need to avoid windy conditions for the safest attack.

Paving Sealers

weeds growing next to block paving

One of the best ways to lock weeds out of your block paving is to seal it off. Sealing your joints means that weeds have nowhere to travel, and there’s less chance of cross-pollination from pesky plants such as dandelions.

What’s more, the top block paving sealers we reviewed will also be water-resistant, reducing the amount soaked into your joints by a considerable degree.

One of the biggest openings for weeds and other plants in block paving is when the sand has been blasted clear. Pressure sprayer cleaning can loosen joints, giving microorganisms and natural nasties room to propagate. Therefore, the best protection is to seal your block driveway—and keep a good weed prevention product to hand just in case.

What’s The Best Time of Year to Spray Weeds?

Ideally, try spraying your weeds pre-growth. That means you should focus on attacking growths in spring and autumn. They’re just starting to take root in spring, and you can catch them unawares. In autumn, they’re weakening and will be easier to kill.

Safety First

Most products will be highly abrasive, so always wear protective gloves and goggles and spray from a recommended distance.

You should also ensure children and pets are kept out of the way while the solution remains wet. The best weed solutions should dry within a few hours, if not overnight.

What’s the best way to stop weeds growing through block paving?

While most solutions will help prevent these nasties from returning, there’s never a guarantee – so you need to cut off their rooting routes. That means making sure the joints between your blocks are tight and compact. Either use setting sand or seal off your joints.

Weeds love moist nooks and crannies. Your best line of defence is sealing and tightly compacting these cracks, ensuring sand is unlikely to blast free. If you don’t want to use a sealer, top up your joints with kiln-dried sand.

This handy guide will help you stop weeds from growing in pavers.

FAQ’s 

Should you pressure wash weeds in block pavers?

There’s no harm in pressure washing block paving occasionally, but you must do so carefully. Too much pressure and you could blast sand out of your joints, creating a perfect storm for nasty weeds.

Will weed killer stain block paving?

It’s unlikely that weed killer will stain block paving, but if unsure, do a test patch of a few blocks. Also, if the area is sealed, it may react with the chemical.

Last Word

weeds growing through paving

Weed killers come in various types, specialities, and concentrations. For block paving, look for a simple spray that soaks deep into the root and doesn’t require digging or trowel work.

For our money, the best weed killer for block-paved surfaces is Roundup Weedkiller, which has a simple one-touch trigger action. This is one of the easiest weed sprays to use. It’s comfy on the hands, gets to work within a few days, and soaks deep into the source of the problem.

Unlike some surface treatments, Roundup’s solution kills weeds within days. Its ten-minute continuous spray is also simple to aim and apply.

You can try to kill weeds off with some home solutions – dish soap, vinegar, etc. – but for the best results, you’ll need a product formulated for the job. Make sure to seal off your block paving for prevention first.