Roundup 5377504 Weed & Grass Killer Spray, 1.33 gal, 4-Month Preventer

The 1.33-gallon spray treats existing weeds and grass while helping prevent new growth for up to 4 months. Its Pump 'N Go 2 Sprayer has an extendable wand for targeted application. The formula kills weeds and grass down to the roots. Use it on hardscape and landscape areas where you want both weed control and prevention.

Pros

This product addresses two parts of weed control in one application: it kills emerged weeds and grass, then helps stop new growth for up to 4 months. That makes it useful for areas such as driveway and sidewalk cracks, patio edges, gravel, and fence lines, where repeat growth can be difficult to manage. For prevention, spray the entire area you want to control rather than treating only the weeds already visible.

The Pump 'N Go 2 Sprayer includes an extendable wand and provides up to 10 minutes of continuous spray. This supports steady coverage across a defined area without relying on brief, repeated trigger sprays. The formula is rainproof in as fast as 30 minutes, and weeds can begin to yellow and wilt within hours, complete kill takes 1 to 2 weeks.

Quick overview

Roundup Dual Action Weed & Grass Killer Plus 4 Month Preventer is designed for targeted use on hardscapes and landscape areas. Apply it to cracks and crevices in driveways, sidewalks, and patios, along fences, in mulched beds, around the base of well-established desirable plants, shrubs, or trees, and on gravel. Coverage is up to 300 square feet, giving you a practical reference when planning treatment for a defined section.

Compared with a spot-only approach that treats visible weeds, this product is also intended to prevent new weeds and grass across the treated area. That distinction matters for places where the goal is to manage both current growth and regrowth. Apply only to areas where you want to kill existing weeds and prevent future growth.

Tips for day-to-day use

For prevention, cover the full area you want to control, not just the emerged weeds. The manufacturer recommends applying in warm, sunny weather above 60°F for best results. Rain or watering 30 minutes after application will not wash away its effectiveness. Visible changes may start within hours, while complete kill can take 1 to 2 weeks.

Plan future planting around the treated area: ornamental bedding plants, trees, shrubs, sod, and seed can be planted 4 months after application. This timing is especially relevant when treating mulched beds or areas intended for later landscaping.

Practical questions

Where can I use this weed killer? It is intended for hardscape and landscape areas, including driveway, sidewalk, and patio cracks, fence lines, mulched beds, gravel, and around the base of well-established desirable plants, shrubs, or trees.

How should I apply it to prevent new weeds? Spray the entire area you want to control. Treating only the weeds that have already emerged does not provide the intended area-wide prevention.

When can I plant in a treated area? Ornamental bedding plants, trees, shrubs, sod, and seed can be planted 4 months after application.

Buying verdict

For driveway, sidewalk, patio, fence-line, and gravel upkeep, this 1.33-gallon formula combines root-level weed and grass control with up to 4 months of prevention. The extendable-wand sprayer and up-to-300-square-foot coverage suit planned treatment of defined areas where controlling both existing growth and future weeds is the goal.