Apply weed killer to monobloc drive after power washing

[rob_j20]

If you buy it in strong concentrations and mix to the right ratio, it is potent stuff. In fact, I only used it because the farmer on the fields behind where we used to live bought two drums of the stuff and had incredibly effective results.

Bleach too breaks down very quickly into salt and water.

I have glyphosate 360, doesn't kill horsetail effectively even applied neat, kills the shoots but not the rhizomes. I have found caustic soda does, also cleans the patio.