After reading the whole Bewertngen, I have promised more of the agents. Until now I have my farm (approximately 250m2 cobblestones and grass pavers) always sprayed with Roundup UltraMax, so is the weeds in the joints within a few days, at least 1 week received (dried), because Roundup but unfortunately only one sheet effect, came the weeds always quite quickly. After spraying with Permaclean happened only once 10-14 days nothing, then, the various weeds discolored slowly into yellowish, I hope that the weeds still completely received (the syringes is now about 1 month ago) and due to the alleged floor effect for a longer time grows no more. I can not say anything yet about the long-term effect. Addendum 17:07:13: Now the syringes 1.5 months ago, now the directly sprayed weed is yellowish dried up around, but individual weeds come again through green, of real long-term / ground effect so no trace. I am absolutely disappointed with the means now. Addendum 02:10:13: I have 1.5 months ago again sprayed the entire area, since it is precisely the dandelions proliferated like crazy, grass did not come up again by the dandelions went only once, but overgrown again happily to himself (vereinzelnd grow in between thistles and nettles), I find that stuff already slow as fertilizer for dandelions in front (in the grass pavers I now have a Löwenzahnwiese)! So who wants to kill only grasses, Permaclean can take, but who has dandelions, thistles and nettles, should take something else.
