Acetic acid based weed killer, paving damage?

[J McNulty]

Hi,

Hopefully one of the well educated gang can advise.

Any advice much appreciated.

Looked online for weed killer and saw "new way spray way" which is based on acetic acid, weeds are destroyed pronto but I reckon there's potential for paving to be destroyed pronto too, but, apparently it's approved for use on hard surfaces.

Does that mean it's safe for run-off into drains or safe that won't discolour paving?

Saw recently B&Q selling an own brand pre mixed squirty bottle claiming death to weeds in 1 or 2 hours, didn't list active ingredients on bottle but think the Americans might of used it in Vietnam.....

I have copy and pasted some info below.......

New Way Weed Spray

New-Way Weed Spray is the first natural based, non-selective herbicide. Now approved for moss control on hard surfaces.



Based on highly concentrated acetic acid, New-Way Weed Spray controls a wide range of weeds and grasses.

Made from naturally occurring ingredients
Approved for hard surfaces
Will control mosses on hard surfaces
Fast acting – weeds die 1-2 days after treatment
Can be used year round
New Way Weed Spray from Headland Amenity is the first NATURAL non-selective herbicide for weed control in the UK. The active ingredient – acetic acid – has been formulated from the highest food grade product and developed to produce a formulation suitable for controlling a wide range of weeds and grasses.



What is it?

New Way Weed Spray contains 240g/litre acetic acid as a soluble concentrate. Acetic acid occurs naturally through fermentation processes and breaks down to water, so is safe to the environment. It is the first herbicide to be approved for use on hard surfaces in the UK for many years.



How does it work?

New Way Weed Spray is a non-selective herbicide with extremely fast activity and is active against most soft plant tissue it comes in contact with. It controls both grasses and broad-leaved weeds. The product produces discolouration and browning of the foliage within a few hours of treatment and during warm sunny weather most plants die within 1-2 days. The product can be used year round. Perennial weeds generally require more than one application to control but annual weeds are usually controlled with one treatment.



Areas of Use

New Way Weed Spray can be used to control weed growth in amenity situations such as footpaths and pavements, parks, around trees, shrubs and hedges and in industrial areas such as railways, industrial sites and fence lines etc. It is approved for moss control on hard surfaces such as footpaths and tennis courts. Unlike other moss killers for hard surfaces, Natural Weed Spray No. 1 will also control weeds and grass as well, eliminating the need for a separate application.



Application

Apply as a coarse spray so that leaves and stems are fully wetted before run-off. Ensure full coverage. The product is not translocated within the plant and therefore is safer to use around trees, shrubs and other valuable plants.



Mixing

Mix 1 part New Way Weed Spray to 3 parts of clean water. For example in a 16 litre knapsack sprayer mix 4 litres of New Way Weed Spray to 12 litres of water in the following manner.
Half fill Spray tank with clean water
Add the required amount of New Way Weed Spray
Fill the tank with more clean water to the required level
Agitate before use


Repeat treatment as required. Perennial weeds will need more than one application to control them.



Weather

The product can be used year round. Applications made in cooler months will take longer to work. In warm sunny weather most weeds will die within 1-2 days. Apply the product on a dry day. Rain, soon after spraying, may wash spray off the foliage leading to poor results.



Subsequent Planting

As there are no residual effects with the product in the soil, sowing and planting may be undertaken as soon as the weeds have died.



Pack Size: 10 litre

MAPP No. 17911

Always read the label. Use pesticides safely.


Stock Out of Stock
Prices From £54.99ex VAT
10 litre £54.99 ex VAT

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Technical Information

> MSDS
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[lutonlagerlout]

if this is right why not boil up some vinegar to remove the excess water and use that?
vinegar is acetic acid 5% water 95 %
roughly
cheers LLL

[Carberry]

What LLL says is correct.
I assume this stuff is based on horticultural vinegar.
Wouldn't boil up vinegar though, your house will stink.

[r896neo]

Works out pretty damn expensive and will take forever to apply.

60 quid for 10L and that only covers 400msq?? Plus diluted at 3:1 you will have to apply 40L of product which is 2-3 full tanks which applied with a pressure spraying is going to take ages. Not great.

To treat the same area with round-up would be about 2 quid? And also take a tenth as long. and control perrenial weeds first time.

It may work out more cost effective as a moss control but even then its 3 or more times the cost to hypochlorite which is very effective.

[Dave_L]

What do you guys use weedkiller-wise? I find the only ones available after we used to use sodium chlorate are rubbish!

[mike builder/landscaper]

Roundup biactive dave, from farmway, near us, mix it to whatever strength is required to kill the weeds, full booklet attached to the bottle giving good instructions of what mix you require