How Do I Refill?

If you already own and love a Roundup® Weed & Grass Killer product with a wand, then a refill container will be your best value.


Carefully pour the refill into your original ready-to-use container. That’s it! No need to add water — just the product itself.

Roundup® Ready-To-Use Weed & Grass Killer III Refill

Roundup® Extended Control Weed & Grass Killer Plus Weed Preventer Refill

Roundup® Max Control 365 Refill


You can also refill some of your Roundup® Weed & Grass Killer products with their concentrate counterparts. In this case, pour the amount of concentrate called for on the label into the container, and then fill the rest with water. It’s best to fill it slowly to minimize foaming. We recommend using the following mix rates for our concentrates, but be sure to read the label for more specific directions.

Roundup® Concentrate Max Control 365

  • 6 oz. per gallon of water

Roundup® Concentrate Poison Ivy Plus Tough Brush Killer

  • 6 oz. per gallon of water

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