Roundup Dual Action Weed & Grass Killer Plus 4 Month Preventer, 32 fl. oz.
Roundup Dual Action Weed & Grass Killer Plus 4 Month Preventer, 32 fl. oz.
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Roundup Dual Action Weed & Grass Killer Plus 4 Month Preventer, 32 fl. oz.

839 ratings

Key item features

  • Dual Action: Kills existing weeds and grass down to the root while preventing new growth for up to four months by creating an invisible soil barrier.
  • Rapid Results: Rainproof in as fast as 30 minutes, with visible results appearing in as fast as six hours.
  • Versatile Application: Suitable for hardscapes like driveways, sidewalks, and patios, along fences, in mulched beds, around well-established plants, and on gravel areas.
  • Planting Interval: Ornamental bedding plants, trees, shrubs, sod, and seed can be planted four months after application.
  • Concentrate Mixing: Mix 6 fl. oz. of concentrate per gallon of water in a tank sprayer; spray the entire area to prevent new weeds, not just emerged ones.
  • Extensive Coverage: One 32 fl. oz. bottle of concentrate covers up to 1,600 square feet.
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Customer ratings & reviews

4.5 out of 5 stars
stars
839 ratings433 reviews
How item rating is calculated
  1. 5 stars76% (639)
  2. 4 stars13% (113)
  3. 3 stars4% (33)
  4. 2 stars1% (11)
  5. 1 star5% (43)

Reviews summary

Pros

  • : Simple to operate with spray application and nozzle design.
  • : Kills weeds for several months with a single application.
  • : Offers large quantity or long-lasting performance.
  • : Easy to set up with no mixing required.
  • : Suitable for weed control in driveway areas.

Neutral

  • : Can be mild, but also strong and pungent.
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Showing 1-3 of 433 reviews

Jul 19, 2026
Reviewer name: Patricia
Walmart Associate
Item details
Size: 32 oz
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Worked well with multiple uses. Grass and weeds took over our gravel driveway and grass %26 weed killer we had on hand from last year no longer was working. This one bottle took care of the entire top driveway and the lower wider driveway only had one treatment it needed a second treatment but ran out. Will be ordering more definitely. Wish I had taken before and after pictures

Helpful?1L81NPMCOH3T1776355644
Oct 16, 2026
Reviewer name: DogMom
Item details
Size: 32 oz
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Worth the Money

Awesome stuff

Helpful?1L81NPMCOH3T1776355644
May 28, 2026
Reviewer name: AwareOne
Item details
Size: 32 oz
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

The only excellent weed killer

It just works.

Helpful?1L81NPMCOH3T1776355644
Current price is Now $31.50
You save $9.49
was $40.99
98.4 ¢/fl oz
Price when purchased online
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