Control Solutions Eraser A/P Weed & Grass Killer 41% Concent
✅ PROS
- 41% glyphosate concentration matches name-brand Roundup at roughly half the cost per gallon of mixed spray
- Surfactant already included in the formula—no need to buy a separate wetting agent for most applications
- 2.5-gallon size covers up to 3,200 square feet at standard 3-ounce-per-gallon mixing rate
❌ CONS
- No measuring cap included—buyers must supply their own measuring device, which is a genuine oversight
- Non-selective formula kills everything it touches, including desirable turf and ornamentals if overspray drifts
- Strong chemical odor during mixing requires gloves and eye protection; not a casual grab-and-go product
The Verdict
Let’s cut through the noise: if you’re facing a field of bindweed, poison ivy, or a gravel driveway that looks like a jungle, you don’t need another “eco-friendly” spray that works in three weeks. You need something that kills roots dead. The Control Solutions Eraser A/P is that something—a 41% glyphosate concentrate that does exactly what the label promises, and at a price that makes the big-name brands look like a tax on your ignorance.
What You Actually Get
This is a 2.5-gallon jug of amber liquid. That’s it—no sprayer, no measuring cup, no frills. The concentrate contains 41% isopropylamine salt of glyphosate, which is the exact same active ingredient and concentration as Roundup Super Concentrate. The label instructs mixing 3 ounces per gallon of water for general weed control, or 6 ounces per gallon for tough perennials like poison ivy and Canada thistle. At the standard rate, this jug makes roughly 106 gallons of ready-to-spray herbicide—enough to cover a solid acre of weeds.
Real-World Performance
The chemistry here is proven. Glyphosate works by inhibiting the EPSP synthase enzyme, which plants need to produce essential amino acids. It absorbs through green tissue and translocates to the roots. You’ll see visible yellowing within 5–7 days on annual weeds, but give perennials a full 14 days before you expect total kill. Resistance isn’t a concern for most home users—this is still the gold standard for non-selective control.
What separates this from cheaper concentrates is the built-in surfactant. The formula already contains a wetting agent, so the spray beads up and clings to waxy leaves like lamb’s quarters and crabgrass rather than running off onto the soil where it does nothing. I tested it on a patch of quackgrass along a fence line—two weeks later, it was brown, crispy, and dead to the root crown.
What Buyers Keep Saying
The consensus across 235 ratings (4.7 stars) is that this is the best value in chemical weed control. One reviewer put it plainly: “Same active ingredient as Roundup, but I paid a third of the price for five times the product.” Another noted, “I’ve used it for three seasons now. It kills everything I spray, including the stuff I didn’t mean to spray.” That last part is the recurring theme—people love the power but respect the risk.
Where It Falls Short
The biggest gripe, and it’s legitimate: there’s no measuring cap. You’re expected to have your own graduated cylinder or measuring spoon. For a product this concentrated, guessing the ratio is dangerous—too weak and you waste time, too strong and you risk soil sterilant effects. Buy a cheap plastic measuring cup and dedicate it to this task.
Second, this is non-selective. If it hits your lawn, your lawn dies. If wind carries a mist onto your tomato plants, they’re gone. Spray only on calm days, and use a shield if you’re working near desirable plants.
Finally, the odor. It’s not overwhelming, but it’s distinctly chemical. Wear gloves and eye protection when mixing, and don’t leave the jug in a hot garage—pressure can build.
Who Should Buy This
You need this if you’re managing a large property, a farm fence line, or a commercial-scale weed problem. It’s also ideal for pre-planting bed prep in a new garden—kill everything, wait two weeks, then till. Casual gardeners with a single patio crack of weeds would be better served by a ready-to-use spray bottle; the concentrate’s shelf life is good, but the mixing hassle isn’t worth it for a 20-square-foot problem.
FAQ
Q: How long does it take to see results? A: Annual weeds show yellowing in 5–7 days. Perennials like poison ivy take 10–14 days for complete kill. Don’t re-spray too early—if you see green tissue, wait another week.
Q: Can I use this on my lawn to kill broadleaf weeds? A: No. This kills grass too. For lawn-safe broadleaf control, you need a selective herbicide like 2,4-D or dicamba. This is strictly for spot treatment, fence lines, driveways, or total vegetation control.
Q: Is it safe for vegetable gardens? A: Glyphosate binds tightly to soil particles and breaks down within days, so it won’t harm future plantings once absorbed. But never spray it directly on edible crops—it’s not labeled for that, and residue on produce is a real concern.
The Verdict
Buy it if: You have a serious weed problem, want professional-grade results, and don’t mind mixing your own spray. At this price per gallon of coverage, nothing else comes close.
Skip it if: You’re a casual gardener, you hate measuring chemicals, or you need something selective for lawn care.
Rating: 4.6/5 — One star deducted for the missing measuring cap and the non-selective risk that requires careful handling. But for raw killing power per dollar, this is the best value on Amazon.
Where to Buy
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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.