Screen wash solution mix....don't laugh

mizfiesta | 16:49 Sat 29th Dec 2007 | Motoring

8 Answers

I have just bought a 500ml bottle of concentrated screen wash. The directions instruct me to use a mixture of 25% screenwash to water, in winter months. My question is, for this 500ml bottle of screen wash, how much water do I dilute it with? My brain is just going numb and I cannot work it out! Math etc, has never been my strong point ha.

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loon

Hi mizfiesta:

What ever amount of water you measure out add a 1/4 of that amount of screen wash.

Loon

Sheherazade

25% is one fourth, so the other THREE QUARTERS of the solution must be water.

Therefore, measure out some cleaner and add three times as much water, ie:
100ml cleaner to 300ml water, or
50ml cleaner to 150 ml water.

Probably best not to mix up the whole bottle at once -- some chemical solutions don't keep as well once diluted with water.

mizfiesta

Question Author

Thanks for your help Loon. Much appreciated.

Sheherazade

Just saw Loon's answer when I submitted mine -- adding 1/4 as much cleaner would make a 20% solution, not 25. To make it 25% you need to add one third as much cleaner as water.

But you reminded me that yes, I should have said it's generally safer to add a chemical to water rather than water to a chemical. Sorry.

mizfiesta

Question Author

I've just made up the solution using the 500ml of screenwash to 2000mls of water...that ok? I just made the whole lot up as it's for my screen washers on car and the container under the bonnet should take what I've made up.