Since the minerals are designed to inhibit weed growth for as long as possible, the efflorescence will take a long time to disappear. If it was my drive/patio I would pressure clean the complete area and use an industrialised weedkiller options I was considering Dansand No Grow Block Paving Sand or. With the correct use of DANSAND ® joint filling sand, you get a great result that lasts for many years.

Specially designed to be as fine as possible, Dansand No Grow is ideal for joints between 3-10mm and can be brushed into the space between your patio pavers with no added chemicals, then lightly wet to set into a hardened joint. I always do this now as a matter of course, it stops the salts coming out and frost damage etc, etc. The product consists of washed and oven-dried silica sand, to which we have added a natural mineral. Ensure joints are clean of weeds before brushing in Dansand NO GROW to help inhibit new weed growth and keep your block paving looking good for longer.It is a naturally occurring phenomenon that often occurs during warm periods such as spring or early summer. Also, the lime and mineral content in the filling material may leave a whitish coating on the paving stones. Although Dansand No Grow mainly provides excellent and cost-effective protection to the joints in block paving, its lack of any active pesticides will cause it to struggle in block-paved patios that suffer from excessive weed growth. I bought this product with intention of filling the narrow gaps of block paving the crushed gravels are large and doesn’t go through therefore Wasn’t good for me and wouldn’t recommend to anyone who has paved gap less than 1. I contacted Dansand and they said that I probably did not follow the instructions and that they have not had any other complaints and weeds do grow though this product.

In a block paving installation with individual paver heights of at least 4cm and a joint width between 3-10 mm, one 20kg bag of Dansand No Grow will cover between 5-10 square metres. Thanks to this filler’s specially designed formula consisting of tiny beads of kiln-dried sand, you’ll find that its naturally nutrient-poor minerals work to suppress weed growth by drying out the seeds before they take root. It is therefore important that you filled your joints in a height of 4 cm when you first applied DANSAND® NO GROW™ in 2021. This membrane is resistant to wind and weather and makes it impossible for weed seeds to penetrate into the joint.Weeds rarely grow up against the plinth, since the drier environment close to the house itself gives them poor growth conditions.

All you do is sweep area clean and spray with hose pipe then sweep of any standing water , you can just sweep the compound into the joints . However, we recommend a covered storage location, as the plastic foil will not withstand heavy rain. Dansand No Grow is just one example of their excellent product range, an easy-to-use brush in jointing sand that uses organic minerals and a naturally high pH value to inhibit weed growth in block paving. To use our product DANSAND TOP LOCK® polymeric/ Firm Fix block paving fix at this time of the year (January) is very risky, the weather is often rainy, and the temperature is often also too low ( Recommended temp 10 to 30 degrees as shown on the bag), so the risk for that the joints are not setting properly is very high, due to the hardening conditions are not optimal at this time of the year. There’s also the benefit of Dansand No Grow’s natural weed-preventing abilities to account for, meaning you won’t need to fork out on a coat of patio sealer to fully protect your paving from unwanted organic pests and moss growth.TOP LOCK ® polymeric block paving fix has an optimum grain curve making the material easy to compact into joints, giving you stable, durable and flexible paving joints. If you went for a DANSAND® product which is meant to create a fixed joint, if the material was dry when you opened the bag and if you followed the instructions on the bag carefully you you should not experience the issue that you describe. The mineral has a naturally high pH value, which creates a nutrient-poor environment in your joints. If the paving is new, vibrate twice using a protective rubber mat on the vibrating plate to avoid damage to the paving surface. This allows for targeted protection only from unwanted plant life, with the surrounding flowers and bushes in your garden and around your paving installation completely free from environmentally unsafe chemicals or growth-inhibiting compounds.

I purchased another product for my driveway, and it set fine as hard as concrete, but the odd small weed came through.You will get the best result by maintaining the recommended joint width of 1–5 mm and a depth of 40 mm as a minimum.