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 Monaco

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€ 53.56

Duties & taxes included

In stock

Sold byAmazon MonacoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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

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Description

🐀 Lock down your rodent problem with the UK’s strongest, weatherproof bait!

SAFE SECURE USAGE - Complies with UK regulations requiring lockable bait stations to protect pets & children.
DUAL PACK CONVENIENCE - 600g total bait supply, enough to eliminate up to 40 rodents, perfect for prolonged infestations.
PROFESSIONAL GRADE QUALITY TESTED - Formulated and vetted by pest control experts for guaranteed effectiveness.
UNMATCHED WEATHERPROOF DURABILITY - Wax-based blocks resist moisture and spoilage for outdoor & indoor use.
MULTI FEED FORMULA FOR MAXIMUM KILL RATE - Designed to overcome bait shyness and ensure lethal dosing from day one.

Opkill’s Rat Poison & Mouse Killer Twin Pack offers 600g of the UK’s strongest multi-feed rodent bait, expertly formulated and quality tested for professional and domestic use. Its weatherproof wax blocks ensure durability outdoors, while the multi-feed design maximizes kill rates by reducing bait shyness. Compliant with UK safety regulations, it requires use with tamper-resistant bait stations to protect non-target species. Ideal for tackling rats and mice in gardens, sheds, lofts, and more, this twin pack provides a reliable, fast-acting solution trusted by thousands.

Specifications

ASIN	B07QZ1HGFC
Best Sellers Rank	6,392 in Garden ( See Top 100 in Garden ) 144 in Rodent Control
Brand	Opkill
Brand Name	Opkill
Customer Reviews	4.5 out of 5 stars 1,074 Reviews
Item Form	Granules
Item form	Granules
Part Number	U3380P
Target Species	Rodents
Target species	Rodents
UPC	750258666984

Reviews

M**K

Great for Rats and Mice

Good stuff. Have ordered this several times over the years to deal with rats 🐀 in our compost bins. Worked each time. Unfortunately the neighbours insist on over feeding the birds 🐦 and soon attract an fresh set of rodents

27.05.2026

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

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

A**N

Good rat poison

As describes fast delivery and good price

24.12.2025

J**L

Magpies love them

Not sure about the effectiveness with rats but the magpies (family of 5 in my garden) have had field day moving them from a closed small area between a fence and extension wall which I thought they couldn't access as it's very narrow. Reason I know magpies have moved them as they have been fighting and I have found one in the gutter of single storey extension, in shrubs near bird bath and in containers. Think the sparkly red colour attracted them.

12.07.2026

J**Y

Very good stuff work's well

The rat's love them

18.11.2025

D**Y

Price

A very good buy

3.12.2025

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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

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The delivery time was excellent, and the packaging was secure.

2 months ago

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Great price for an authentic product. Fast international shipping too!

3 weeks ago

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€ 53.56

Duties & taxes included

In stock

Sold byAmazon MonacoDelivered 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 Monaco.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago