Driveway cracks can harbor stubborn weeds that crack seals and distract from curb appeal. The right weed killer not only eliminates existing plants but also prevents regrowth in hardscape joints. This guide reviews top options designed for cracks, crevices, and adjacent landscape areas, emphasizing fast action, rain resistance, and long-lasting preventers. Each product is evaluated on effectiveness, safety around shrubs and trees, and ease of use for homeowners.
| Product | Brand | Key Benefit |
|---|---|---|
| Roundup Dual Action 365 Weed & Grass Killer Plus 12 Month Preventer | Roundup | Kills and prevents for up to 12 months |
| Roundup Dual Action Weed & Grass Killer Plus 4 Month Preventer | Roundup | Immediate kill with 4-month prevention |
| Roundup Dual Action 365 Weed & Grass Killer Plus 12 Month Preventer Refill | Roundup | Extended protection up to 12 months |
| Roundup Weed & Grass Killer₄ Refill | Roundup | Broad-spectrum kill with short wait times |
| Ortho GroundClear Weed and Grass Killer with Comfort Wand | Ortho | Fast-acting, rainproof in hours; good for hardscapes |
Note: The products listed below are evaluated for use on driveways, walkways, and other hardscape areas where cracks and crevices attract weeds. Always follow the label for safe use near plants and pets.
Roundup Dual Action 365 With 12 Month Preventer
Roundup Dual Action 365 is designed to kill existing weeds and prevent new growth for up to 12 months. It targets tough weeds in cracks and crevices and produces visible results within hours. The Comfort Wand provides steady, controlled application for precise treatment on narrow joints in driveways. This option is particularly useful for homeowners seeking long-term control with a single product that handles both eradication and prevention.
Key features include a fast-acting formula, rainfast performance within about 30 minutes, and broad-spectrum effectiveness against clover, dandelion, crabgrass, poison ivy, and similar weeds. When used as directed, it can help reduce crack weed recurrence across seasons, though reapplication may be needed for heavily trafficked areas or persistent sprouts.
Roundup Dual Action 365 With 4 Month Preventer
This product combines fast weed killing with a 4-month preventive shield. It works on cracks, crevices, and surrounding hardscape areas, helping prevent reignition of established weeds for several months. The Sure Shot Wand offers easy targeting for tight spaces along driveway joints and between pavers. Expect results within hours, with enhanced protection against regrowth during the prevention window.
Consider this option if you want a shorter prevention cycle than the 12-month formulas, but still require quick control of existing weeds and a forward guard against new growth in high-traffic driveways.
Roundup Dual Action 365 Refill 12 Month Preventer
The 12-month refill expands on the original formula, offering extended protection for driveways and adjacent walkways. It targets the same tough weeds and grasses and continues to provide rapid rainfast performance. Refills are ideal for homeowners who already rely on a Roundup system and want to maintain long-term weed suppression without purchasing a new kit.
As with other long-term products, results depend on exposure, sun, and rainfall. Regularly inspecting crack lines and reapplying after extreme weather can help sustain a clean driveway surface year-round.
Roundup Weed & Grass Killer₄ Refill
The Weed & Grass Killer₄ refill is designed for use in a variety of hardscape settings, including driveways, walkways, and around trees or mulch beds. It kills weeds to the root and offers rainfastness within roughly 30 minutes, with visible results in hours. The product is compatible with extended planting windows after application, following label directions.
This option is suitable for homeowners who want broad weed control with the flexibility of refilling their existing application system while maintaining effectiveness against common driveway invaders like dandelions and crabgrass.
Ortho GroundClear With Comfort Wand
Ortho GroundClear provides quick, visible results in as little as 15 minutes and becomes rainproof in about two hours after drying. It is designed for use on hardscape surfaces, sidewalks, driveways, and areas under trees or within landscape beds. It’s not intended for lawns, but it offers strong performance for spot treatments in cracks and along edges where weeds tend to thrive.
With the Comfort Wand, users can precisely apply the product to small crack lines and target weeds without treating desirable plants nearby. The product’s fast action and short wait times appeal to those seeking immediate improvements in cracked driveway surfaces.
Ortho GroundClear Year Long Vegetation Killer2 Concentrate
This concentrate provides long-lasting control for driveways, sidewalks, fence lines, and gravel areas, keeping vegetation suppressed for up to a year when used as directed. It’s designed for areas where no plant growth is wanted for extended periods, making it suitable for cracks that repeatedly invite weed intrusion. It acts quickly to kill weeds to the root and helps prevent regrowth in treated zones.
Consider this option for areas where maintenance is infrequent but long-term suppression is desired, such as remote or rarely re-seeded sections of a driveway.
Spectracide Weed & Grass Killer 2
Spectracide Weed & Grass Killer 2 is designed for use on driveways, walkways, and around trees and flower beds. It delivers a fast-acting formula with visible results in as little as three hours and is rainfast after approximately 15 minutes. This product is suited for homeowners who want quick clearance of weeds while minimizing downtime for nearby plantings.
Because it targets both weeds and grasses, it can be effective for broad crack infestations and can be used around existing plantings if applied carefully and away from desirable flora.
Buying Guide: Key Purchase Considerations
- Target area and weeds: Identify the most common weeds in your cracks (dandelion, crabgrass, clover) and choose a formula proven to address those species.
- Preventive duration: If you want long-term suppression, select products marketed as 6–12 months preventive; if you need short-term control, a 4-month option may suffice.
- Application method: Wand-based systems offer precision for narrow cracks. Refills and concentrates require mixing and proper handling; choose based on your comfort level and equipment compatibility.
- Time to visible results: Quick-acting formulas deliver results within hours; consider whether you need immediate aesthetic improvement or longer-term suppression.
- Rainfastness and weather: Look for products that state rainfast times and plan applications during dry spells to maximize effectiveness.
- Safety and pets/plants: Check labeling for re-entry times and any restrictions around shrubs, trees, or edible plant beds.
- Surface compatibility: Confirm the product is safe for driveways and concrete surfaces, especially if sealants or coatings are present.