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Brush-in Driveway Jointing With Polymeric Resin Mortars

By: Chris Hogan MSc - Updated: 31 Aug 2016 | comments*Discuss
 
Polymeric Brush-in Granule Resin Paving

There are many different ways of grouting or jointing the gaps between paving blocks or flags on a driveway. One relatively new but very easy method is brush-in granular filling where the granules are coated with a resin. These help the granules bind with each other and with the sides of the paving, and products like this are often referred to by the generic name 'polymeric'.

Different Brush-in Products

We have already covered brush-in mortars in Loose Jointing for Block Driveways and the application methods aren't dissimilar. The polymeric resin-based products will last longer though, because the bonding properties of the resin keeps the jointing together better than an ordinary loose fill.

Brush-in polymeric products are quick and easy to lay and make sense for less-uniform flags, where to accurately trowel in mortar would take forever and probably not look particularly good either. They are only suitable for lightly used private driveways, though.

Get the Right Polymeric Product

It is absolutely vital to understand that the application guidelines here are just that, guidelines. It is imperative to read the instructions for any polymeric resin-based product you buy and follow them to the letter.

You must take care to choose the right product for your driveway, too. There are many different manufacturers and brands, and you need to make sure the product you choose will do the job. You need to gauge the width and depth of the gaps you have, and compare them with the specifications of the product. If you use the wrong polymeric, it will not bind properly and will be washed away as easily as small grains of gravel.

Tools and Equipment

The only tools you need are brooms and brushes, hence the name 'brush-in'. A stiff broom is used to sweep the polymeric grains across the driveway surface and the softer one to sweep the excess off later. A large squeegee, by which we mean one that's about three feet long and attached to a broom handle, is useful for the spreading, but by no means absolutely necessary.

As soon as you open the containers of polymeric to the open air they start curing so you have to work fast. Most have a workable life of 10 to 20 minutes, so don't open any containers until you are ready to use them. Use the stiff broom, or squeegee if you have one, to sweep the polymeric across the driveway.

Clearing Up After Polymeric Jointing

There's no need to tamp the material down into the cracks, as it should settle in by itself. Once you've swept the granules into the joints over the whole driveway, go back over it to see if any joints need topping up. Then get on with sweeping the excess off the faces of the paving before it cures.

Most products will start to harden after half an hour, give or take 10 or 20 minutes, depending on the product and the weather conditions. After about half a day they should be able to be walked on, but leave at least a full day before driving on them.

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I've recently used the nexus pro joint v75 on my granite patio. I have not removed enough of the excess after I used it. Anybody know the best way to remove it?
Kyle - 31-Aug-16 @ 4:20 PM
I HAVE A DRIVEWAY THAT WEEDS KEEP GROWING ON . I HAVE JUST POWER HOSED IT AND WAS PUTTING KILN DRIED SAND IN THE JOINTS AND I THOUGHT THERE MUST BE A BETTER WAY AS I KEEP HAVING TO DO THIS EVERY FEW YEARS. CAN ANY BODY HELP ?
CLEM - 11-Aug-16 @ 4:47 PM
We have a block paved driveway that looks awful. The joints are full of weeds and dirt. I intend to jet clean and rejoint in the next couple of weeks but don't just want to use kiln dried sand as the joints are quite wide and it just washes out and the weeds are back after just a few weeks which is soul destroying! I am thinking of using a polymeric compound but they get such mixed reviews. I don't want to waste the money if they won't work. Would I be better off just using cement and sand? Some advice would be really appreciated. Thank you.
RT - 26-Jun-16 @ 8:39 PM
Canpolymeric jointing be used to jointpermeable paving.? Will it hinder water drainage?
clootie - 12-May-15 @ 5:20 PM
I have just researched this because I am fed up with my patio and driveway being full of weeds and moss.I found that Wickes offer a solution and will be trying it myself this weekend.
DJ - 17-May-12 @ 2:48 PM
Hi could you let me know where I can buy polymeric brush in sand for block paving in the UK as im finding it very hard to fined. thanks Adrian
age - 8-May-11 @ 1:40 PM
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