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The UK’s Best Patio Grout & Jointing Compound for Paving Slabs

Do you have paving slabs with cracks or broken pointing? Do you need to know how to fix them? Well, if so, this blog post is for you. We’ll be looking at the best patio grout to fill empty patio joints and make your paving slabs look instantly better.

Patio grout is specially designed for outdoor use and will keep your patio looking great all year long. They also hold together all of your bricks or stones on your patio, preventing weed growth and time-consuming maintenance.

In this article we’ll be reviewing the following patio grouts:

Let’s start by taking a closer look at each grouting product, see which is the best grout for paving, the different types, how much you’ll need and where you can buy them.

Our Best Patio Grouts

We’ve been in the business of patio paving for over 20 years and we want you to have the best results possible. That’s why we put together this guide on how to choose patio grout for pavers that are easy on your budget and still give you professional quality results.

#1. Sika FastFix All-Weather Self-Setting Paving Jointing Compound

At around £30 for a 14kg tub, Sika FastFix is amongst the cheaper patio grout choices on the market, but don’t let the price tag fool you! This pre-mixed grout provides a robust, water-permeable seal to paving with a joint width of at least 5mm and is suitable for use in rainy conditions.

Sika Fast Fix All Weather

Paving joints set with this compound are less susceptible to damage caused by weeds growing through joints.

FastFix’s water-permeable properties allow for the odd jet wash without risking erosion or water pooling and the various colours available set as hard as mortar.

#2. Everbuild Geo-Fix All Weather, 14kg, Grey

Everbuild’s Geo-Fix jointing compound is a pre-mixed patio grout suitable for application in all weather conditions. It boasts a reasonable price point at around £35-£40 for a 14kg tub making it competitively priced against other brands.

Everbuild Geo Fix

The cement-free formula reduces the risk of staining to your stone slabs or tiles, simply brush the compound into the joints and sweep away any excess from the surface of your patio.

It resists weed growth and allows for water drainage through its permeable surface; it’s best suited for joint widths of at least 6mm and 25mm deep.

#3. Wide Gap All Weather Paving Joint Filler Compound Grey 12kg

Wide Gap is a quality and affordable patio compound suitable for all outdoor paving and patio installations. When applied through a simple brush application and exposed to the atmosphere, the joint fill forms a solid mass which, once cured, is unaffected by the weather.

Bond It 12kg Wide Gap Joint Filler

It’s compatible with most types of stone, including natural stone, terracotta, clay, concrete and cobblestones and is suitable for domestic and commercial installations.

#4. Jointing Compound Stone Grey Easy Joint 12.5 Kilo Patio Mortar

Easy Joint is one of the most popular brush in patio grout materials available on the market, and for good reason.

Jointing Compound Stone Grey Easy Joint

At a price of around £30 for a 12.5kg tub, Easy Joint is incredibly easy to apply in all weather conditions with a simple brush-in formula; just make sure there are no dry patches in your paving!

Available in 5 distinct colours, it shows this has been specifically formulated to eliminate the risk of staining and picture framing as well as provide a protection around your paving joints.

#5. Joint It Simple Jointing Mortar Dark Grey (1 x 20kg) – Large Size

Joint It Simple is, as the name implies, simple to use! This self-curing grout is best suited to stone slabs and cobbles; It sets in as little as 24 hours and resists both frost and weed growth.

Joint It Simple

As with the other patio grouts covered, Joint It is a brush-in paving grout that can be applied even in rain and adverse weather. Available in 3 colours, this costs around £40 for a 20kg tub, a reasonably competitive price point.

#6. Bostik 30812549 Patio Grout

Next on the list is Bostik patio grout. It is sand and polymer-based, brush-in compound for use in paving with joint widths of 5mm to 30mm. The durable filler promises to stand up to both weeds and pressure washing, making it an ideal choice for garden patios and walkways.

Bostik Patio Grout

At £20 for a 6kg bag, this may be the best patio grout for smaller jobs or when you need less coverage, but the range of colours on offer may suit your particular paving installation even in larger projects.

#7. Nexus pro-joint fusion

Pro-Joint Fusion stands out from its competitors by offering a range of darker colours, from basalt to black, that produces a sleek and modern finish in any outdoor paving. This brush-in patio grout requires no prior mixing and can be applied directly to damp joints of 3mm in width and up.

Nexus pro-joint fusion

With a cement-free formula, Pro-Joint offers protection from staining and although its 15kg tubs come in at around £50, the contents are split into two 7.5kg bags to minimise waste when working on smaller projects.

What to Look for in Long-Lasting Patio Grout

When deciding on the best paving jointing compound for your patio, we advise breaking down your needs into five simple categories.

1) Coverage: How Many Square Meters?

Firstly, how large of an area are you planning on grouting? If you’re grouting a small patio area, you may want to use a pre-mixed brush-in grout, as it’s easy to apply and will self-cure.

But, for a large outdoor area, a sand and cement or cement slurry-based mortar might be more appropriate for their lower price and higher load-bearing capabilities.

Prioritise measuring your paved area (in square meters) along with the width/depth of the individual joints. Use these calculations to decide on the most appropriate grout and how much you’ll need to buy.

2) Grout Colours:


Buff-coloured grout is a common choice for porcelain tiles and light-coloured stone. This off-white/beige coloured grout is an excellent choice for lightly shaded paving.


Grey-coloured grout compliments brick pavers and dark-coloured tiles, allowing vibrant-coloured stone to stand out on any patio.

Mid Grey

Mid-grey grout is often slightly lighter in tone than its standard grey counterpart and provides an even greater contrast to dark-coloured or vibrant pavers.

Jet Black

Jet black grout is less common and a little harder to find. A few brands do produce this striking style of grout and it tends to create a sleek, modern look against both dark and light-coloured pavers.

3) Price: Value for Money

When taking on a paving job, a balance must be achieved between choosing a patio grout that will last more than a few months and one that doesn’t take you over budget.

Generally, for larger projects, we advise choosing a cement and sand combination to mix on-site, as the base materials of this grout are pretty cheap.

A 14kg plastic tub of pre-mixed grout can cost around £30-£40, whilst similar-sized bags of cement and sand will rarely cost over £10-£15. Whilst pre-mixed compounds require less labour, their costs can increase dramatically with the size of your project.

4) Expected Performance

What is the purpose of your paving? Are you grouting a rarely used patio? Or a driveway that holds several vehicles?

The purpose of your finished paving will determine which patio grout is appropriate. If you’re reinforcing masonry, you’ll need a non-permeable base and cementitious grout for suitable support, but a small patio will benefit from the use of a permeable compound.

By determining how your paving will be used before you decide on your grout, you guarantee that the finished project will stand the test of time and you won’t need to keep refilling large gaps.

5) Ease of Brushing In

Choosing the right brush-in compound can save both time and labour costs over your entire project.

Cementitious slurry and resin-based compounds can be a little tricky to brush into joints; these materials can be thick and cumbersome. Many pre-mix and wet sand compounds are specifically designed to be easily brushed in.

When using a wet brush-in material, you should be aware of the risk of picture framing. If unsealed paving tiles are exposed to moisture, they can absorb the water (and residual minerals), causing permanent stains. If you get stuck this guide will help you remove grout staining.

If your tiles are made from a porous material, consider applying a sealant before brushing in.

Patio Grout Types

1. One Part Polymeric Compounds

Single-part polymeric compounds are perhaps the simplest form of grouting material; they’re most suitable for use in low-traffic areas like walkways and patios.

This patio grout are most commonly made from a filler and a resin/cement binding agent.

They will usually come with a recommendation for use with a minimum joint width and are considered the best grout for patio slabs.

A polymeric compound will often be sold pre-mixed and found in both dry and wet brush-in forms.

These pre-mixed grouts are far less labour intensive to apply than cement mortar and can be found in a range of colours, but they will suffer wear over time if not cared for appropriately.

(That means being careful when using a pressure washer and making sure to sweep your paving regularly!).

This post covers the pros and cons of Polymeric sand in more detail.

2. Two-Part Epoxy Resin

Two-part epoxy resins provide a much stronger chemical reaction than their polymeric counterparts; they must be mixed on-site and applied as a slurry grout to wet paving.

The solid joint formed by this compound can bear heavier loads than polymeric or dry sand paving materials; it’s commonly used in high-traffic areas and driveways.

Two-part epoxy grout isn’t usually the cheapest joint compound available. Still, the solid setting provided by this material is incredibly durable and will prevent weed growth and erosion from damaging your paving joints.

3. Exterior Tile Grout

Exterior tile grouts (also known as powder form grout) usually consist of a dry, cement-based powder that can be mixed with water to produce a slurry grout material for use with outdoor patio tiles.

Exterior tile grout must be applied to a dry surface and allowed to cure for several hours before being exposed to rain, cleaning materials or weight.

Exterior tile grout is set as a fine, cementitious seal around your paving tiles, but it can be a little more brittle than other grouts.

This material is the best grout for patios set with paving tiles or porcelain pavers.

4. Cementitious-Based Slurry Grouts

Using a cementitious-based slurry grout as a joint compound is a cost-effective way to set natural stone and porcelain pavers on an outdoor surface.

These patio grouts are applied as a wet slurry to the joints in your paving and can be used in wet weather with no adverse effect.

Provided you take care to wipe any excess grout from your pavers during installation. This product will not cause staining, prevent weed growth, and survive a pressure wash with no risk of damage (though be careful when using a pressure washer with porous paving stones).

The durable and robust seal provided by a cement base makes this the best paving grout for any form of natural stone paver.

5. Traditional Mortar

Traditional mortar usually consists of a combination of sand and cement mixed with water to form a slurry grout for use in outdoor paving.

This is fairly cheap to produce and can be applied in wet conditions, so it’s often used for larger jobs.

This can be the best patio jointing compound for use in high traffic areas that see regular pressure washer cleaning.

Where To Buy the Best Jointing Compound for Patios


For the average customer, Amazon can be a great source for many different landscaping products. With a large variety of sellers, and the ability to filter searches by price, it’s not uncommon to find some fantastic deals on patio grout that carry a premium at brick-and-mortar stores.

Amazon Prime members can take advantage of their membership to ensure next-day delivery, making Amazon an excellent choice for last-minute purchases!


Toolstation is a respected supplier to many trades with locations all over the UK. Their website offers free next-day delivery and a click-and-collect feature to secure your chosen products without risking a wasted trip.

If you’re a registered tradesperson, Toolstation offers a discount card that can net you a 5% discount on all orders. Couple that with their discount deals (which rotate weekly) and you’re looking at a very worthwhile saving for any large project you may be taking on.


Perhaps Britain’s most well-known DIY store, B&Q, offers a vast range of products at competitive prices.

Their trade-only division, TradePoint, offers a 10% discount across a vast range of products to registered tradespeople. Their DIY Club scheme boasts weekly vouchers and discounts to any customer with an account.


With around 500 stores in the UK, Wickes is one of the more accessible trades stockists for those last-minute purchases and emergency mid-project restocks.

If a customer provides a valid trade ID, Wickes offers a TradePro discount of 10% across the store and orders over £75 qualify for free delivery. However, delivery of products under this value does come with an extra charge, meaning you’d be best using this store for larger orders.


Screwfix boasts the largest brick-and-mortar stores amongst any DIY supplier in the UK (650 sites). With a huge catalogue of products available at trade prices and free delivery seven days a week, Screwfix has been the go-to supplier for many contractors for over 40 years.

Their click and collect service is quick and easy to use, and their in-store ordering system makes for a short and sweet visit.


How to Grout A Patio?

Applying grout to a patio is a reasonably straightforward job. We have a page here that lays out how to grout a patio. Below is a quick overview.

  • Remove any existing grout from the joints and wet the entire patio surface with a hose.
  • Apply your chosen compound to the joints and brush in the material.
  • Use a pointing trowel to compact the joints, ensuring no gaps are present.
  • Finally, sweep away any excess from the surface of your paving and allow the grout to set for around 24 hours.

Jointing Calculator: How Much Product Will I Need?

One of the most critical jobs in this entire process is calculating how much jointing material you’ll need to complete the project. Many people skip or underestimate this step and are left out of pocket with wasted product.

We recommend that you take the time to accurately measure your project area and visit an online calculator before purchasing. This will keep your costs down and minimise any excess waste.

Azpects Ltd provides a joining calculator that can be found here.

Paving Expert also has an excellent calculator here.

Should I Remove The Old Pointing First?

Yes, before laying any new patio grout to your paving, you should always make sure to remove any old grout from the joints. Any remaining old patio grout will affect the quality of the new paving joints when they are set, ultimately risking cracks and breaks forming on the surface.

To guarantee your new patio grout can provide optimal preformance, you’ll want to break away the old joints with a chisel and a mallet.

How Long Before A Jointing Compound Sets Hard?

Though there are slight variations amongst products, generally, it’s advised that you wait at least 24 hours before using a freshly jointed patio.

Some resin and polymer-based patio grouts can take longer to cure but provided the joints are solid and dry to the touch, 24 hours should be long enough for them to hold weight.

How Long Does Patio Grout Take to Dry?

The curing time for can vary quite a bit, but generally, most forms of grout will fully cure in 24 hours.

Resin-based grouts may need less time to cure, cement-based grouts may need longer, but if the joints feel solid after 24 hours, then your paving should be ready to use.

Last Word

bucket with a white mixture in it

Which of these patios grouts would be most helpful? That depends on several factors, such as what types of stone you are re-jointing, whether you have a permeable sub-base or if you want to avoid staining etc.

Check out our recommendations above to see what is the best grout for paving slabs based on your needs!