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Roundup Weed and Grass Killer Concentrate - 36.8 oz

SKU: 687804
UPC: 070183510061
$32.99
  • Kills tough weeds and grasses down to the root with FastAct® systemic technology.
  • Rainproof in 30 minutes with visible results starting as quickly as 9–12 hours.
  • Concentrated formula mixes easily and is ideal for larger outdoor treatment areas.
  • Perfect for patios, walkways, driveways, gravel areas, mulch beds, fences, and landscape preparation.

Roundup Weed & Grass Killer Concentrate (36.8 oz.) delivers powerful and lasting vegetation control, designed to penetrate deep into plant systems for complete root elimination. Formulated with FastAct® technology, this concentrated solution begins working within hours and becomes rainproof in just 30 minutes. Ideal for both small projects and large-scale treatment areas, it mixes easily in a tank sprayer and targets the toughest annuals, perennials, and invasive grasses. Whether you’re preparing a new garden plot, renovating a lawn, or clearing unwanted vegetation along paths and hardscapes, this high-performance concentrate provides dependable, fast, and effective results.


Key Benefits

Destroys weeds and grasses at the root; fast visible results; rainproof shortly after application; versatile use across multiple outdoor surfaces; easy-measure cap included for precise mixing.

Where to Use

Use on patios, walkways, driveways, gravel areas, mulch beds, along fences and foundations, around trees and shrubs, and to prepare areas for lawn replacement or garden bed installation. Not for use on or around existing edible plants.

How It Works

Absorbed through the foliage, the systemic herbicide travels throughout the plant structure to the roots, ensuring a complete kill and preventing regrowth. FastAct® chemistry accelerates visible results.

Application Instructions

Mix 6 fl. oz. of concentrate per 1 gallon of water.
Apply with a tank sprayer for uniform coverage.
Spray leaves thoroughly but avoid runoff.
For best performance, apply during warm, sunny weather when weeds are actively growing.

Active Ingredients

Glyphosate and Diquat (formulations may vary slightly by lot).

Visible Results

Initial wilting and yellowing may be seen within 9–12 hours; complete kill typically occurs within 1–2 weeks depending on species and conditions.

Coverage

36.8 oz. bottle produces multiple gallons of spray solution and treats up to approximately 800–1,300 sq. ft., depending on mixing rate and weed density.

Safety Information

Keep people and pets away from treated areas until spray has dried. Avoid drift onto desirable vegetation. Do not apply around edibles. Follow all label precautions for safe use and handling.

Want to learn more? Check out our related GrangeKnows articles

WARNING: This product can expose you to chemicals including Glyphosate, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov

 
  • Kills tough weeds and grasses down to the root with FastAct® systemic technology.
  • Rainproof in 30 minutes with visible results starting as quickly as 9–12 hours.
  • Concentrated formula mixes easily and is ideal for larger outdoor treatment areas.
  • Perfect for patios, walkways, driveways, gravel areas, mulch beds, fences, and landscape preparation.

Roundup Weed & Grass Killer Concentrate (36.8 oz.) delivers powerful and lasting vegetation control, designed to penetrate deep into plant systems for complete root elimination. Formulated with FastAct® technology, this concentrated solution begins working within hours and becomes rainproof in just 30 minutes. Ideal for both small projects and large-scale treatment areas, it mixes easily in a tank sprayer and targets the toughest annuals, perennials, and invasive grasses. Whether you’re preparing a new garden plot, renovating a lawn, or clearing unwanted vegetation along paths and hardscapes, this high-performance concentrate provides dependable, fast, and effective results.


Key Benefits

Destroys weeds and grasses at the root; fast visible results; rainproof shortly after application; versatile use across multiple outdoor surfaces; easy-measure cap included for precise mixing.

Where to Use

Use on patios, walkways, driveways, gravel areas, mulch beds, along fences and foundations, around trees and shrubs, and to prepare areas for lawn replacement or garden bed installation. Not for use on or around existing edible plants.

How It Works

Absorbed through the foliage, the systemic herbicide travels throughout the plant structure to the roots, ensuring a complete kill and preventing regrowth. FastAct® chemistry accelerates visible results.

Application Instructions

Mix 6 fl. oz. of concentrate per 1 gallon of water.
Apply with a tank sprayer for uniform coverage.
Spray leaves thoroughly but avoid runoff.
For best performance, apply during warm, sunny weather when weeds are actively growing.

Active Ingredients

Glyphosate and Diquat (formulations may vary slightly by lot).

Visible Results

Initial wilting and yellowing may be seen within 9–12 hours; complete kill typically occurs within 1–2 weeks depending on species and conditions.

Coverage

36.8 oz. bottle produces multiple gallons of spray solution and treats up to approximately 800–1,300 sq. ft., depending on mixing rate and weed density.

Safety Information

Keep people and pets away from treated areas until spray has dried. Avoid drift onto desirable vegetation. Do not apply around edibles. Follow all label precautions for safe use and handling.

Want to learn more? Check out our related GrangeKnows articles

WARNING: This product can expose you to chemicals including Glyphosate, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov