Yes it works but it also plays **ll with your soil bcause it leaves a high salt content. It kills just like road salt kills plants. It just sucks the moisture right out of the plant.
PS: It is not environmentally friendly. Gasoline, Diesel fuel and H2SO4 also work but I wouldn't use them either.
A strong vinegar solution also works and you can get Horticultural Vinegar that is properly registered for this purpose.
I am tired of hearing about all these home remedies that are supposedly better and safer than the "chemical" products.
Remember that even Di-hydrogen Monoxide can kill you.
Sorry but that is my rant
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Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skid in sideways - Beer in one hand - Nacho's in the other - body thoroughly used up, totally worn out and screaming : Woo Hoo, what a ride!