Contrac Blox 8kg Rodent Poison Bait.


Kill Rats and Mice fast while ensuring other animals including pets remain safe.




Contrac Blox is a highly palatable, specially formulated single feed anticoagulant rodenticide containing bromadiolone. Excellent for rodent acceptance and control, Contrac Blox is a very effective extermination and maintenance bait for rats and mice. The special formula uses an optimal blend of food grade ingredients and a small amount of paraffin that results in a highly palatable, yet weatherable rodent bait that works well in wet and dry conditions. Bait shyness is not a problem with Contrac because mortality occurs a few days after bait is consumed. Contrac is a trademark of Bell Laboratories Inc.


  • Kills in a single feed
  • High rodent acceptance
  • Mould and mildew resistant
  • Extruded bait with multiple edges for easy gnawing
  • Hole through the middle of the blox for securing
  • Lethal dose can be consumed in 1 feed
  • Excellent clean out and maintenance bait
  • AsureQuality Category B approved for use in Dairy factories
  • NZFSA Category B for use in Meat, Game and Fish processing plants

What the problem is

Rodents are a major threat in today’s world. Rats and mice damage our buildings, gnaw on electrical and telecommunications wires, and can affect people mentally. But most importantly, rodents are a threat to our public health as they can transmit many diseases to humans, 50% of which can result in severe infections or death.

Health Impacts

  • May be harmful if swallowed
  • Keep out of reach of children and domestic animals, particularly cats, dogs, pigs and birds
  • Less toxic to non target animals in primary and secondary poisoning situations than other single feeding anticoagulants
  • If swallowed do not induce vomiting, contact the National Poisons Centre on 0800 POISON (0800 764 766) or a doctor immediately

Technical Specifications

  • Contains 50ppm Bromadiolone
  • 28gm baits multi edged rectangular blocks

Environmental Impact

  • A solid non-volatile material that is essentially insoluble in water
  • Toxic to fish and wildlife
  • Avoid contamination of any water supply with bait or empty containers

How to Use

  • Firstly determine the severity of the infestation – droppings are a good indicator of infestation size, and varying faeces size indicate that juveniles and adults are present, many droppings indicate a large infestation
  • Concentrate baiting in high activity areas
  • There are 6 key principles to successful baiting: 1) choose the right bait for the job, 2) place baits where rodents travel, 3) use the proper number of bait placements, 4) read the rodenticide label before placing bait, 5) use bait stations wherever safety is a concern, 6) eliminate the rodents food, water and harbourage wherever possible
  • Store in the original contrainer, tightly closed and away from foodstuffs
  • Avoid all contact by mouth, wash hands and exposed skin before meals, smoking and after any contact
  • Do not use where food or feed could become contaminated
  • Retrieve and burn all rodent carcasses, unused bait and bait containers after use, and dipose of the empty container safely