KleenUp 41% Weed & Grass Killer Concentrate
Best concentrated herbicide for homeowners tackling stubborn, deep-rooted weeds.
Tackle stubborn weeds and unwanted grass with KleenUp 41% Weed & Grass Killer Concentrate. This powerful, systemic herbicide is formulated with 41% glyphosate to effectively eliminate a wide range of broadleaf and grassy weeds, killing them from the root up for complete control. Ideal for use on lawns, driveways, and garden areas, one pint treats up to 6,300 square feet. Its fast-acting formula becomes rainproof in just six hours, ensuring lasting protection against regrowth. For particularly resilient weeds, a follow-up application may be beneficial.
$19.99
Owner Satisfaction
4.6
/ 5
Category Rank
99
/ 555
#99 in Herbicides
Price vs Category Average
-80%
Below average
Active Ingredient Concentration
41
/ % Glyphosate
Who it's for
- Impatient landscapers needing quick visual confirmation of weed control
- Gardeners struggling with persistent, deep-rooted perennial weeds
- Budget-conscious homeowners managing large properties or expansive areas
Who should skip it
- Eco-conscious consumers prioritizing non-glyphosate or organic alternatives
- Careful gardeners protecting delicate flowers and nearby ornamental plants
- Users preferring the convenience of ready-to-use spray bottles
Performance breakdown
Root-kill efficacy
Systemic formula ensures weeds are eliminated entirely from the root system.
Concentration potency
High 41% glyphosate content delivers professional-grade strength for stubborn vegetation.
Weather resilience
Rainproof protection kicks in quickly to prevent wash-off after application.
Coverage efficiency
A single pint provides impressive reach for large residential garden spaces.
Application versatility
Effective across diverse surfaces from manicured lawns to rugged driveway cracks.
Broad-spectrum control
Reliably targets a wide variety of both broadleaf and grassy weeds.
Key Specs
Active Ingredient Concentration
41% Glyphosate
Net Content
16 oz
Coverage
Up to 6,300 square feet per pint
Activity Type
Systemic Herbicide
Rainfastness
6 hours after application
Weed Types Controlled
Broadleaf and grassy weeds
Selectivity Type
Non-Selective
Application Form
Concentrate
Features
- Systemic action kills weeds to the root.
- 41% glyphosate for broad-spectrum control.
- Rainproof in 6 hours.
- Covers up to 6,300 sq. ft. per pint.
- Kills all unwanted weeds and grasses.
- Effective on lawns and hardscapes.
What customers say
Customers consistently praise the KleenUp 41% concentrate for its exceptional reliability and strong value. Reviewers frequently note the rapid effectiveness, often seeing weeds wilt within a day of application. This high concentration formula is considered a smart, economical choice for treating large areas, offering professional grade results without the professional price tag. Users appreciate that a little goes a long way, confirming its status as a highly dependable solution for persistent weed problems.
Know before you buy
KleenUp is a non-selective herbicide, meaning it will kill or damage any vegetation it contacts, including your lawn grass. Use it carefully for spot-treating weeds in lawns or for clearing unwanted growth in driveways and garden beds.
As a systemic herbicide, it works by traveling from the leaves down to the root system. While it is fast-acting, you will typically see the weeds begin to wilt and yellow within a few days, with complete control occurring over the following weeks.
Yes, but you must be very careful to avoid overspray or drift onto your desirable flowers and shrubs. It is best to apply it on a calm, windless day and use a shield or careful aim to ensure the product only touches the weeds you intend to remove.
The formula is rainproof six hours after application. If it rains before this six-hour window, the effectiveness of the treatment may be reduced, and you might need to reapply.
Yes, this is a concentrate and must be diluted with water according to the instructions on the label before application. One 16-ounce pint can cover up to 6,300 square feet depending on your specific dilution ratio and application method.
While it is highly effective at killing weeds down to the root, some particularly resilient or mature weeds may require a follow-up application. Additionally, this product does not prevent new seeds from germinating in the soil later on.
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