They should be put into bait boxes so are unlikely to get wet, but they have a type of wax coating anyway so will not dissolve in the rain. They are ususally gone within a couple of days so don't get much chance to get wet!

Once ingested, how long does it take to kill a rat? Do I have to worry about them dying in my walls and stinking for weeks?

This can be a problem, we have had them in the roof and the smell was awful. Well I seem to have fed them quite a lot. refresh the bait every month or shake to box to see if it's empty. It does work well and you must remember to change the type of poison every 6 months to stop them from becoming immune.

How many needed to kill a rat? I placed 7 out two nights ago and ALL were taken, done the same last night and nothing has been taken this time?

Hello, This really depends on the level of infestation and how much has been ingested at once. As a multi feed this can take up-to 24-48 hours to work but typically 1 bag for approximate 5 rats however can remove an infestation of up-to 20 if evenly distributed. Our advise would be to check the baits in a weeks time and re-apply. Hope this answer helps Kind regards Opkill Customer service.

Can you deliver to Spain?

I don't know, you would need to contact the seller for the answer

Twin Pack | Desertcart UK

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Description

🐭 Outsmart pests before they multiply – the pro’s choice for unstoppable rodent control!

SAFE SECURE USAGE - Compatible with lockable bait stations to meet safety regulations and protect non-target animals and children.
MULTI FEED TECHNOLOGY - Reduces bait shyness by encouraging multiple feedings, maximizing poison intake for guaranteed results.
ALL WEATHER RESILIENCE - Designed to withstand rain and outdoor conditions, ensuring consistent performance anytime, anywhere.
RAPID RODENT ELIMINATION - Experience swift control with a fast-acting formula that starts working from day one.
PROFESSIONAL GRADE QUALITY - Formulated and quality-tested by pest control experts for trusted effectiveness in both domestic and commercial settings.

Opkill Rat Poison & Mouse Killer Twin Pack offers 600g of the strongest, weatherproof bait blocks designed for fast and effective rodent elimination. Featuring multi-feed technology to reduce bait shyness, these professional-grade blocks are quality tested and safe for both domestic and professional use. Compatible with lockable bait stations, this twin pack ensures secure, reliable pest control that works from day one.

Specifications

ASIN	B07QZ1HGFC
Best Sellers Rank	3,601 in Garden ( See Top 100 in Garden ) 98 in Rodent Control
Brand Name	Opkill
Country of Origin	United Kingdom
Customer Reviews	4.5 4.5 out of 5 stars (1,064)
Item Form	Granules
Part Number	U3380P
Target Species	Rodents
UPC	750258666984

Reviews

C**Y

⭐️⭐️⭐️⭐️⭐️ Effective and convenient rodent control

The Opkill Rat Poison & Mouse Killer twin pack is reliable and easy to use. The packaging is neat, and the product quality feels solid. It helped address my rodent problem quickly and efficiently. Having two packs is very convenient for longer-term use. Overall, a dependable option for anyone needing effective pest control. Highly recommended.

4.01.2026

J**Y

Very good stuff work's well

The rat's love them

18.11.2025

A**N

Good rat poison

As describes fast delivery and good price

24.12.2025

R**L

Appears to work, but slowly.

Put this in proper secure bait boxes and all of the poisen has gone when checked the following week, but the rats are still running around for a while afterwards. I get that there are probably a few rats but it does seem to take an entire packet to get rid of one or two rats. So it does work but seems to take effect really slowly which surely is not humaine for the rats. Did try the humane rat traps but had 10 rats at one point (2 adults and 8 babies), and caught two over a period of a couple of months so had to do something more drastic. Do feel bad but they had their chance to be relocated to a local wildlife area.

3.04.2022

A**E

Does the job

Champion

11.04.2026

M**L

no proof

I have three bait boxes in 7m x 5m filled with this product, still hear rats running through wall and in the loft. Don't really know if it's working as baits are being consumed.

20.12.2022

D**Y

Price

A very good buy

3.12.2025

S**E

Easy to handle and weatherproof

I found this easy to handle and within 2 days I found several dead mice around the garden so it is obviously working. The little vermin seem to be attracted to the smell! although I can't smell anything from it and it is a very strong poison so be very careful to wash your hands afterwards. I always put it out using gloves just to be extra safe. Good value for something that is guaranteed to work.

5.11.2022

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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£21.31

Duties & taxes included

In stock

Sold byAmazon UKDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to UK.

Secure transaction

ProDesertcart PRO

Fast, free shipping, member pricing & priority support.

Join PRO →

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago