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Deadfast Mouse & Rat Killer Plus Blocks
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Deadfast Mouse & Rat Killer Plus Blocks is the most innovative anticoagulant in the biocidal market, presenting no known resistance in rodents. The blocks will withstand all weathers and provide excellent stability in conditions of high moisture as well as dust.

Sizes available

  • 15 bait blocks
  • Product Details
  • How to Use
  • Tips & Advice
  • Useful Information

Why Use

  • Deadfast Mouse & Rat Killer Plus Blocks contains Difethialone. This is the most innovative anticoagulant in the biocidal market, presenting no known resistance in rodents.
  • It has been developed to be effective at only 25ppm to ensure rodents consume a lethal dose the first time, making this bait ideal even for high infestations.
  • Blocks have excellent stability in difficult conditions of high moisture and dust. They are stable at a wide temperature range (-15° to +50°C), easy to spike, rod and replace.
  • No known resistance
  • Lethal dose first time
  • Stable in humid conditions



Deadfast Mouse & Rat Killer Plus Blocks contain Difethialone. Use Biocides safely. Always read the label and product information before use.

How to Use

For use only as an amateur rat & mouse killer.

General Advice

  • To avoid risks to human health and the environment comply with the instructions for use
  • Do not breathe dust
  • Do not eat, drink or smoke when using this product
  • Avoid release to the environment
  • Wear protective gloves when handling
  • Prevent access to bait by children, birds and non-target animals (particularly dogs, cats, pigs and poultry)
  • Baits must be securely placed in a way so as to minimise the risk of consumption by other animals or children Where possible, secure baits so they can not be dragged away
  • Search for and remove dead rodents at frequent intervals during treatment, at least as often as when baits are checked and/or replenished
  • Daily inspection may be required in some circumstances
  • Wash hands and exposed skin before meals and after use
  • Keep in a cool, dry, well-ventilated place
  • Store only in original container


Frequently Asked Questions

Q: Why is the bait in sachets? Do I need to remove the sachets?

A: There has been a recent change in the law on how rodenticides can be sold. They must not be sold loose. The sachets have tiny (impossible to see) perforations that allow rodents to smell and be attracted to the food. The bait is very palatable to rodents and they will happily chew through the sachets to get at the contents

Q: How would I dispose of any dead rodents?

A: Whilst wearing gloves remove dead rodents and place them in a double bag, put this bag into a secure household refuse bin.

For any questions or advice, please contact our technical advice line on 01480 443789 (Mon-Fri 10am-4pm) or email [email protected]

Safety Information

WARNING: May cause damage to Organs through prolonged or repeated Exposure. Harmful to Aquatic Life with Long Lasting Effects.

Contains 0.025g/kg Difethialone

Have product container or label when obtaining treatment advice. In case of emergency call a local poison control centre or doctor immediately for treatment advice

Direct or In-direct adverse Effects:

  • Effects result from the increased tendency to bleed.
  • In less severe poisoning: Bruising easily with occasion nose or gum bleeds, Appearance of blood in stools, Excessive bleeding from minor cuts or abrasions.
  • Poisoning symptoms Clinical symptoms: nosebleed, gum bleed, spitting blood, multiple or large haematoma, generally sudden appearance of an unusual visceral pain.
  • Biological symptoms: blood in the urine, increase in coagulation time.
  • In cases of suspected exposure, medical assistance should be sought immediately. Note that poisoning symptoms may develop over the course of several days.

If on Skin:

  • Remove contaminated clothing. Launder before re-use
  • Rinse skin immediately with soap and water
  • Monitor for symptoms described above

If in Eyes: 

  • Hold eye open and rinse slowly and gently with water for 15-20 minutes
  • Remove contact lenses if present, after the first 5 minutes, then continue rinsing the eye
  • Monitor for symptoms described above

If Swallowed:

  • Wash out mouth with plenty of water
  • Seek medical advice immediately and show container/label
  • Do not induce vomiting unless told to do so by the poison centre or doctor
  • Do not give anything by mouth to an unconscious person


  • Dispose of contents and container according to local regulations. Contact your local council for details.


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