Romax D Block Rat and Mouse Killer

Romax D Block Rat and Mouse Killer are poison bait blocks for amateur use against rats and mice. They contain 0.0025% w/w difenacoum and are designed to be contained within lockable rat bait stations and mouse bait stations.  These are very popular and effective rodent poison block.

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From £6.78



  • Rat and Mouse Poison Block
  • Easy to Use
  • Rapid Take and Fast Acting
  • Contains .0025% difenacoum

The Romax D Blocks can be used indoors or outdoors and are supplied as 15 x 20g blocks.
The deadly blocks are shaped to ensure mice nibble the edges to eat their lethal dose fast. The blocks have a central hole for securing onto a rod or spike found in most rat bait stations and mouse bait stations.

How to use

  • The Romax D bait blocks should always be placed in a suitable rat bait station or mouse bait station.
  • Remove any other food that is easily available in the area, do this a few days before placing the bait boxes.
  • Place the bait station in the vicinity where rodent activity has been seen and out of the reach of children and pets.
  • At the beginning check bait boxes every 2-3 days and at least weekly, refill with bait as necessary
  • Check the area for any rodent bodies and dispose of in a suitable manner.
  • Mice exhibit a rapid investigatory response to new objects, but their interest wanes rapidly and they move on to something new.
  • Use bait points of 1 block in a bait box, 10m apart, reducing to 5m in heavy infestation.
  • Mice are inquisitive so move the bait points every 2-3 days.
  • Always check manufacturer instructions before use.

Safety data

Click here for Safety Data Sheet.

UK Authorisation Number UK-2016-0994-0005





UK Mainland

DPD Next Working Day

£6.00 (FREE on orders over £75.00)

Scottish Highlands

DPD 2 Day Service


Scottish Islands, Isle of Man, Scilly and Channel

DPD 2 Day Service


Isle of Wight

DPD 2 Day Service


Northern Ireland and Eire

DPD 2 Day Service


Please Note:

Orders placed Monday to Thursday before 3.45pm, or Friday before 1.45pm will be despatched that day.

Orders placed on a Friday after 2pm or over the weekend will be dispatched the following Monday, unless that Monday is a bank holiday.

We do not offer Saturday delivery.  Collection is possible by arrangement.

We also deliver internationally. Please contact us for a delivery quotation price before ordering. View our full delivery policy here


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