looking for commerical grade weed killer

[ksgrassguy]

Hi all,
I own a building and have weeds of various sizes and types and looking for something that really kills them. I tried round up and to me it seems to laugh at it. some looking for recommendations that kills and prevents growth for a few months

thanks in advance

 

[KennyV]

For long term use something like Spike...
Spike® 20P herbicide
Follow lable instructions... :smile:KennyV

 

[wjjones]

Gly-4 is another good one.