Roundup Fast Action Weedkiller Pump 'N Go Spray – 5L Ready-to-Use Glyphosate Formula – Kills Weeds & Roots with Visible Results in 1-2 Days – Refillable Pressure Sprayer with Extendable Lance

I’ve tried quite a few weed killers, and this is one of the more effective ones I’ve used — especially if you want something ready-to-use that actually kills weeds at the root, not just the surface. The Pump ‘N Go design is a big win for convenience. There’s no mixing or measuring — just pump and spray. Once pressurised, it delivers a steady, even spray which makes it easy to cover patios, edges, and larger areas without constantly stopping or tiring your hand. What stood out most is how it performs over time. This is clearly a strong formula — weeds don’t just wilt, they continue to die off over several days and visibly shrink. I saw results within a couple of days, and it kept working well beyond that. I’ve uploaded photos from days 3, 4, 6 and 16 to show the progression. It also held up after some light rain shortly after application, which I wasn’t expecting, but it didn’t seem to affect the overall effectiveness. The smell is noticeable while spraying but not overpowering, and it fades fairly quickly once dry. In terms of safety, this isn’t something you’d want pets around while it’s still wet due to the strength of the ingredients. I kept pets completely away until it had fully dried, and I’d recommend doing the same. One thing to be aware of — I did feel slight dizziness while spraying, so it’s worth using this in a well-ventilated outdoor space and considering a mask or face covering if you’re sensitive to sprays. Pros: ✔ Ready-to-use — no mixing needed ✔ Even, consistent spray from the pump system ✔ Covers larger areas easily ✔ Starts working within days ✔ Continues killing weeds over time (not just surface-level) ✔ Still effective even after light rain Cons: ✖ Slight chemical smell during use ✖ Can cause dizziness if inhaled — take precautions ✖ Needs to fully dry before pets can access the area ✖ Initial pumping takes a bit of effort Overall: If you want a no-fuss weed killer that actually tackles weeds at the root and keeps working over time, this is a solid choice. Just use it with basic precautions, and it delivers exactly what you’d expect — even with a bit of unpredictable weather.

This stuff is great. Does exactly what you want and quickly. Absolutely stinks. I'd definitely recommend twisting the white end nozzle so that it sprays. That said, despite its size, I feel this large quantity won't last that long. Still: A huge saving on prices I've seen locally in stores. So, Amazon is the place to purchase. Ready to go and built-in pump is very useful, unlike previous weedkiller I've bought. Will probably buy again.

This definitely worked well for me. All grasses, weeds gone and after being away there were a lots big and small. Easy to assemble spray and pump system, instructions on the tub. No leaks at all and simple to use. Bought two on a deal but 1 was enough for pavement out in front of house, front garden between slabs/path etc. and half of my back garden which was a right mess. Would definitely buy again.

The weeds didn't know what hit them. This was really effective and all the weeds were a wonderful shade of brown after an hour. I waited a bit and then pulled the weeds up as easy as possible. I don't want to do this ever again but I know where to go if necessary.

This product does the job but coverage is not quite as good as suggested and pump action doesn’t work very well. The main thing is that it does kill the weeds R

Product is excellent but cardboard packaging insufficient. No protection for the pump handle at top which explains why it was broken on arrival. Impossible to use without the pump!

I recently used the Roundup Total Weed Killer Pressure Sprayer and overall I’d give it a solid 4 stars. It does exactly what it promises—kills weeds effectively and fairly quickly. Within a few days, I could already see noticeable results, especially on common garden weeds like dandelions and nettles. The pressure sprayer is a big plus. It’s convenient, easy to pump, and gives a consistent spray, which makes covering larger areas much quicker than using a manual trigger bottle. I also appreciated that it comes pre-mixed, so there’s no hassle with measuring or mixing chemicals. That said, it’s not perfect. The sprayer can feel a bit flimsy at times, and I found that it needed occasional re-pressurizing more often than expected. Also, while it works well on most weeds, tougher or more established ones may need a second application. Overall, it’s a reliable and time-saving product that makes weed control straightforward. With a slightly sturdier build, it would easily be a 5-star item.

Very good method of application and seems to be working very well.