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Roundup Weed and Grass Killer Concentrate 32 oz

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

One application kills weeds and grass on contact, then blocks regrowth in treated areas for up to 12 months.
Roundup MPN 5378106 In Stock & Ready to Ship
$56.99
Free shipping on orders over $75
Ships within 24 hours · most orders arrive in about 2 business days

About Product Overview

Roundup's Dual Action 365 concentrate does two jobs most weed killers split into separate products: it kills existing weeds and grass on contact, then keeps new growth from taking hold for up to 12 months. That combination makes it a solid choice for driveways, walkways, fence lines, and other landscape beds where you'd rather not be back out there every few weeks re-treating the same patch.

The concentrate mixes with water and goes down as a spray, with each gallon of solution covering roughly 300 square feet. It's rain-proof once applied, so a surprise shower won't wash away the work you just did. It's a post-emergent formula, meaning it's built to knock out weeds and crabgrass that have already sprouted rather than stop seeds before they germinate.

  • Container size: 32 oz concentrate bottle
  • Kills existing weeds and grass, then prevents regrowth for up to 12 months
  • Rain-proof formula once applied
  • Post-emergent - treats weeds and crabgrass already growing
  • Multi-season, multi-region use for landscape areas
  • Active ingredients include diquat dibromide, fluazifop-P-butyl, imazapic, and triclopyr

The Details Specifications

Brand Roundup
Model / MPN 5378106
UPC 070183000357
Weight 2 lbs
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
Price check

Go ahead. Check.

You're going to price-check us against Amazon, Home Depot, and Lowe's. Everybody does. Good — open all three tabs. We'll wait. Then look hard at what you're actually being handed over there.

On Amazon, start with these four questions before you click buy.

01

Who's actually selling it

The brand name is on the listing. A different company is in the seller field. Those aren't the same thing, and the second one is who you're buying from.

02

Whether the warranty survives

Most manufacturers only honor a warranty when the unit came through an authorized dealer. We're authorized for Roundup. A third-party marketplace seller usually isn't.

03

Where the box came from

Gray-market stock, returns repackaged as new, and outright fakes move through marketplaces constantly. It all looks identical in the photo. It stops looking identical when it fails.

04

Who you call when it breaks

Ours is a phone number with a person behind it who has held this product. M–F, 6 AM – 5 PM Pacific. (866) 469-8556

The big boxes don't care if your hardware store survives.

Amazon, Home Depot, and Lowe's are built to pull every hardware dollar out of your town. When the local shop can't keep the lights on, the counter where somebody actually knew which part you needed goes with it. We're built the other way: real brands so you're never stuck on a marketplace, and a straight answer to buy it down the street when that's the better call. Support independent hardware — it doesn't restock itself.

Why we tell you to shop local
Authorized dealer · Roundup

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Shop Local · Support Independent

Every order helps keep your local hardware store on the corner.

Why we built NHG
You might find it for less locally. Independent retailers often offer competitive pricing — some products are even cheaper in-store than online.
Real expert advice — not search results. Independent hardware staff know their inventory and the local conditions you're working in.
Keep the neighborhood working. Every dollar spent at an independent retailer returns roughly 3x more to your local economy than at a national chain.

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