Contrac Blox Rodenticide

Active Ingredient: Bromadiolone .005%

DESCRIPTION: Contrac® All-weather Blox® Rodenticide is a multi-edged, single feeding Rat and Mouse bait. It is formulated with an optimal blend of food grade ingredients and low wax to yield a highly palatable, weatherable bait that is very attractive to rodents. Contrac® All-weather Blox® contains Bromadiolone, which is less toxic to non-target animals in primary and secondary poisoning.

USE: Baits are small 1 oz. size and can be placed in bait stations, in holes and burrows, or where mice and rats tend to travel. A hole in the center of each block allows it to be placed on bait securing rods in tamper resistant bait stations, or nail or wire it in place.

NOT FOR SALE IN: AK

Ready-to-use CONTRAC BLOX bait pieces feature a patented multi-edge design that gives rodents plenty of gnawing edges per piece. The 1-oz. bait pieces fit easily into burrows, bait stations and tight baiting places. A hole through the center lets you wire/hang the bait, or place on bait securing rods for added security.

It is colored blue and authorized by USDA for use in federally inspected meat and poultry plants.

Do not place bait in areas where there is a possibility of contaminating food or surfaces that come in direct contact with food. Do not broadcast bait.

SELECTION OF TREATMENT AREAS: Determine areas where rats or mice will most likely find and consume the bait. Generally, these areas are along walls, by gnawed openings, in or beside burrows, in corners and concealed places, between floors and walls, or in locations where rodents or their signs have been seen. Remove as much alternative food as possible.

Norway rats and house mice may consume a lethal dose in one feeding with first dead rodents appearing four to five days after treatment begins.

DIRECTIONS FOR USE

APPLICATION DIRECTIONS: Each bait block in this container weighs approximately one ounce.
RATS: Place 3 to 16 CONTRAC BLOX (usually at intervals of 15 to 30 feet) per placement. Maintain an uninterrupted supply of fresh bait for at least 10 days or until signs of rat activity cease.
MICE: Place 1 block per placement. Space placements at 8- to 12- foot intervals. Two CONTRAC BLOX may be needed at points of very high mouse activity. Maintain an uninterrupted supply of fresh bait for at least 15 days or until signs of mouse activity cease.
RATS AND MICE: Replace contaminated or spoiled bait immediately. Collect and dispose of all dead animals and leftover bait properly. To prevent reinfestation, limit sources of rodent food, water, and harborage as much as possible. If reinfestation does occur, repeat treatment. Where a continuous source of infestation is present, establish permanent bait stations and replenish as needed.

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Average Customer Rating (89 reviews) Write a Review Sort By: Newest FirstOldest FirstMost Helpful FirstHighest Rated FirstLowest Rated First

  

• 49 of 53 people found this review helpful:

    Mice like it. But...
  By Robert on February 24, 2009

  I live in a row-house and have an on and off again love-hate relationship with mice. They love me. I hate them. I put these Contrac Blox in my detached garage and almost every morning they are nibbled at (there is a field behind the garages). They eat it but is it true that if the bait goes stale you have to throw it out? Does it become ineffective? How long? Is there an expiration date on the pail? I would hate to buy the 18 lb size and then have to throw most of it out. Help?

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• 36 of 37 people found this review helpful:

    This stuff is the best!
  By Denis on May 12, 2010
  Verified Purchase

  Living in a restaurant filled neighborhood in DC with unkempt neighbors on both sides of our house led to our backyard becoming a rat highway. It got so bad that we would have 6 or 7 running across every 5 mins. all night - and they were getting closer and closer to the house. We looked at all kinds of new fencing options only to realize it wouldn't have made a difference since they'd probably just burrow underneath it. We bought this and in less than 1 week's time, we have abolished every rat! We only had one meet his maker in the yard that we had to dispose of, the other hundred or so wandered off to die. It's been close a month now and we still have not seen one. This stuff is BAD A@!.

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• 23 of 23 people found this review helpful:

    Mice are gone!
  By Tom on August 23, 2005

  We were getting rundown with field mice from the lot next to our home. Traps were not getting the job done. After 2 weeks using Contrac Blox Rodenticide the mice were gone....Thanx

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• 16 of 16 people found this review helpful:

    The "TRUTH"
  By Tarik on March 13, 2010
  Verified Purchase

  This stuff is the truth. I've tried the Rex traps and other traps but those other methods just didn't get the job done. I live in a duplex with joining garages and my neighbor had dog food which attracted the rats. They were multiplying faster than I could trap them. I bought Contrac and placed them in stacks of three around my garage also stacked six of them where the garages joined. The next day the six were gone. I replaced the six with six more, they disappeared. Within five days not a sign of rats or droppings. I didn't even have to dispose of the dead rats. This is a winner!!!!!!!!!!!!!!

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• 13 of 14 people found this review helpful:

    Best I have seen
  By Harold on November 9, 2006

  This is the best I have seen. I had a bucket of Contrac Blox rodenticide sitting in the barn and the rats ate a hole in the top of the bucket.

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•   Contrac Blox Rodenticide - 18 lb. Pail
  By John on May 21, 2013

  I works like it should.

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• 1 of 1 people found this review helpful:

    The problem is gone!!!!
  By Katya on April 26, 2013

  I had huge rats and mice running all over my house. It was so many of them. We got this product and within a week I haven't seen a thing. We purposely left food on the table overnight but everything stayed untouched. THEY ARE GONE. The product worked 100%.

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•   Contrac Blox The Only Rodenticide I Buy!
  By Papajim on April 25, 2013

  After using Contrac Blox Rodenticide for the past two seasons with success I again ordered a 18 lb. pail for continued use on my property.

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•   Storage Facility
  By Andria on March 30, 2013

  Very easy to use and works wonderful! Great pricing and fast shipping! Use in a outdoor storage facility and havent had a problem since using it!

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•   contact blox
  By Marlen on January 30, 2013

  have just started using the product. have not seen any activity yet-----that's good the phone sales rep. had good knowledge and was helpful-----happy so far

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•   Knocks em Dead
  By John on January 27, 2013
  Verified Purchase

  Stuff works............... Fast................... Nuff Said.

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•   Review
  By Ben on December 31, 2012

  Could not have been better! Very easy and quick. Would certainly recommend them to everyone.

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•   Perfect solution to a big problem!
  By Cynthia on December 26, 2012

  This bait/stations have worked wonders for rat control for years now.... I was trapping 50 rats every three weeks on my property using nine traps, and after setting six of these stations with this Contrac Blox bait around the property, the rats are gone. Of course, I do have to continue to fill the stations periodically to control the infestation where I live, but as long as I keep the bait in the stations, they work like a charm. The rats go underground to die, I have not found one dead rat on my property. This bait is efficient and inexpensive and well worth purchasing if you have a problem with rats. Also, I talked at length with one of the experts and he assured me these stations are safe around children and cats, or (in my case) rabbits..... I have a friend who has domestic rats (pets) and she researched this poison and discovered that it is a 'humane' way to kill a mass number of rats. I HIGHLY recommend this product, and am so very thankful for the day I discovered it at DoMyOwnPestConrol.com and spoke with their expert. I have encouraged others in this area to use them and they have been successful for them as well. One other thing to mention - when you very first set these stations around, it will take about 3 weeks before you will notice the effect..... BE PATIENT - don't keep moving them or opening them.... just leave them alone and be patient because this system of controling a rat infestation really works! You'll have to fill them more often at first, and then less as time goes by.

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•   Mouse Bait
  By Thea on November 28, 2012

  within 2-3 days started seeing dead mice, we found maybe 1/2 dozen dead, but think many left the house after feeling sick from poison. It's been 3-4 weeks since we started putting bait down and has probably been over a week since we've seen a mouse.

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•   I haven't seen any rats
  By Tom on November 4, 2012

  I haven't seen any rats since I've started using the Contrac Blox. I put a pellet or 2 out where I would see them often and the pellets disappear but I have yet to see any more rats running amok like they were before I started using this product.

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June 2, 2011 Michael asked:

QWhat are the new regulations on rodent products that go into effect on June 4th, 2011?

AThe federal government has decided that certain types of rodenticides should not be sold in the same manner they have been after June 4, 2011.  These regulations were passed to try to prevent over the counter sales of rodenticides to homeowners and minimize secondary poisoning and misuse of rodenticides.  Unfortunately too many people have placed rodenticides in locations they should not be, such as easy to access places that children and pets can easily get to.  Basically all of the smaller quantities of rodent bait that you have been able to purchase over the counter will no longer be available.  You will only be able to purchase bait already inside a rodent station that is a one time use product.  It will come pre-baited in a sealed rodent station.  This will be the general rule for big box stores like Wal-Mart and Home Depot.  For a specialty store like ourselves, Do My Own Pest Control, we will no longer be able to sell certain rodent place packs, liquid rodenticides, or bait blox in smaller quantities than 16 pounds.  This was passed to discourage homeowners from purchasing rodenticides since they have to now purchase them in large quantities.  Most homeowners do not need 16 lbs worth of place packs.  We will be able to continue to sell the current stock that we have of currently labeled product while supplies last.  However, after June 4th, once we sell out of our current stock and start receiving newly manufactured bait, we will no longer be able to sell it in less than 16lb increments.  There will be some baits that we can continue to sell in smaller quantities but they will be very few and only the ones that have a minimal secondary poisoning risk.

38 of 41 people found this answer helpful.
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August 17, 2009 Bonita asked:

QWhat happens to mice after they eat Contrac Blox?
I live in a mobile home and I purchased Contrac Blox and scattered it under my home. What happens to the mice after they eat it? How long does it take for them to die? Do they need water for this product to work?

AContrac Blox is an anti-coagulant which means once the mice eat this product they begin to bleed to death from the inside.  The mice first become sick, and then grow tired and weak and pass in their sleep.  It can take anywhere from a few hours to a few days depending on how much the mice have eaten.  They do not need water for the product to work. 

12 of 12 people found this answer helpful.
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April 30, 2010 Craig asked:

QWhich rodent bait is best for mice in a house that has two dogs?
I have mice in my house and was wondering which poison is better, Final Blox or Contrac Blox for me? I was reading the info on both and do not really know what the difference is, since they both claim to be the best, which confuses me since they are made by the same company. So my question is which one is best for mice in a house that has two dogs? The bait stations will be placed in areas of the house that the dogs can not get to (attic/basement).

AContrac Blox is usually preferred in homes with pets and/or children as there is a readily available antidote in the event of accidental ingestion and because of the reduced risk of secondary poisonings (if one of your dogs were to eat a poisoned mouse). Final Blox is used when a fast clean out is needed as it will kill the rodents a bit faster than the Contrac Blox. Final Blox does have a higher risk of secondary poisoning. We recommend that you use tamper resistant bait stations that will help stop accidental poisonings of non-target animals no matter which bait you select.

6 of 7 people found this answer helpful.
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July 24, 2010 Akeem asked:

QWhy aren't the rats eating the Contrac Blox?
I ordered a bucket of Contrac blox along with three tamper proof bait stations. I placed 12 blocks in each station, and I threw some extra blocks down the holes they were burrowing in. I put peanut butter in one of the bait stations on the blocks. I opened up all three boxes a week later, and none of the bloxs were touched. Yet, they tried to get into the bucket of left overs I had. They are going into the bait stations, but they are not eating, why is that?

ADo you know if they ate the Contrac blox that you put down the burrows?  Did the rodents die from those blocks and never went in the stations? Typically, if none of the blocks are eaten then there is a food competition issue.  If there is other food accessible that is more attractive to the rodents then they will eat the other food first.  This could be pet food, bird seed, food in a garden, etc...  Do any of these situations exist?  Also, placement of the bait stations are critical.  Were the station placed along the foundation or along edges with holes against the wall?

6 of 6 people found this answer helpful.
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March 9, 2010 Monte asked:

QHow long do the Contrac Blox stay fresh if stored properly in the bucket?
How long do the Contrac Blox stay fresh if stored properly in the bucket? Does the product fade in time due to opening and closing lid to use product? How effective is this product compared to the individual contract pellet packets?

AContrac Blox should be used within about 1 year of the purchase date. The active ingredient within the product would most likely stay effective long after 1 year but the food ingredients or the attractants will start to degrade and will no longer be attractive to rodents. Just opening and closing the lid of the storage container would not cause the product to lose its efficacy, but storing the product without a lid could cause it to mold or otherwise degrade. Contrac Blox and Contrac Place paks are essentially the same product just in different shapes and packaging. Contrac Place Paks are very useful for treating mice that love to tear open and gnaw through packaging and the pellets are small enough for them to hold and consume, but the product would eliminate both rats or mice. Contrac Blox work well for both rats and mice by providing them with a large gnawing surface.

5 of 5 people found this answer helpful.
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March 5, 2013 Ronnie from Baton Rouge, La. asked:

QWill horses eat Contrac Blox and will it hurt them?
I put some in a ceiling of a horse barn where the rats are nesting and I am finding some in the stalls. The rats are carrying them out of the ceiling and dropping them in the stalls. I was wondering what would happen if a horse ate one and if he would?

AHorses and rats are both mammals and the bait will have the same effect on both of them. Of course a horse weighs a lot more so it would need to consume more of the bait to receive a lethal dose. We are not sure if horses would be attracted to the bait because it has not been tested for horses. Bait should never be tossed into spaces because of a rats tendency to move it around. In the future you should use piano wire to string the bait onto and then nail the wire down so the rats can not take off with the bait (for spaces that inaccessible to non-target animals and children only). For places that are accessible to children and non-target animals the bait should be placed in tamper resistant bait stations which will also prevent the rat from removing the bait.

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January 4, 2013 Mika from Monroe La asked:

QIs it safe to place this product inside floor vents? (I saw a mouse go through my floor vent)
I killed a mouse and two weeks later I saw another one. The area where I stay was once a wooded area and they built townhouse. Please help because I hear noises in the floor vents!!!!

AYou cannot place the Contrac inside the vents. You can place the Contrac inside tamper resistant bait stations near the vents and in places where you have noticed activity. The mice and or rats must come out of the vents to get food so they will eventually find the bait. The alternative would be to use snap traps or glue boards in areas where you have noticed activity. By using snap traps and or glue boards you will know exactly where the rodent has died and make removal easy.

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March 21, 2012 Russ from El Cajon Ca asked:

QShould I be concerned about secondary poisoning when using Contrac Blox?
I am worried the neighbors cat may eat a poisoned rodent. I will be using Protecta Bait Stations.

A

The risk of secondary poisoning with Contrac Blox is very minimal. A rodent only consumes a very small amount of bait at a time and passes it very quickly only keeping a smaller amount in their liver until they succumb to the effects of the bait. A cat would have to actually eat 20-30 rodents that have consumed the bait for it to have an effect. In most cases well fed domesticated animals will not actually eat a mouse or a rat that they come across. Instead they will play with it, chew it and then leave it behind.

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February 18, 2012 Eve from Forestville,ca. asked:

Qsecondary poisoning concern with wildlife & contrac blox.Also, how effective in killing voles?
I garden near wildlife habitat & considering using contrac blox for dusky footed wood rats & for a vole population explosion-which can be very destructive to all sorts of plantings.What about birds of prey,snakes,foxes,etc.-if they eat a recently poisoned rodent?How effective is it for voles?

AContrac Blox is not labeled for voles or for dusky footed wood rats. Contract Blox is only labeled for Norway Rats, Roof Rats and House Mice. Also due to the new EPA regulations, when used outdoors rodenticides can only be used immediately adjacent to or within 20 ft of a structure and the bait must be contained in tamper resistant bait stations. There is a chance of secondary poisoning if an animal eats a rodent that has been killed by rodenticide. Terad3 rodenticide is usually used in areas where secondary poisoning is a concern because it has a reduced risk of secondary poisoning. No matter what bait you choose you will still need to remove and dispose of any carcass you find to help eliminate the risk of secondary poisonings. You should know that most products that were labeled for voles have now been removed from the market by the EPA. In most cases it is recommended that you use old fashioned wooden snap traps placed directly in the voles travel paths to help reduce vole numbers.

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December 21, 2011 Richard from Mclean, Va asked:

QI suspect that my bait station with Contrac is attracting racoons; will the Contrac kill a racoon?
Bait stations are placed in the yard to deal with rats. Bait stations will be found 3 to 4 feet from where they were placed and bait is gone. I do not want to attract racoons or other critters. Should a different bait be considered or should I not bait the traps for some period of time?

AThe Contrac can kill a raccoon if it ate enough, but it would have to eat a large amount.  It doesn't sound like your stations are secure at all to the ground or to some other structure.  You can use liquid nails and affix the station on a 1 x 1 foot paver you can buy from home depot.  This well prevent them from being moved.  Also, if you make sure the bait is secured on the rods, and the station is secure, it should prevent the raccoons from being able to work the bait free from the rods.

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December 11, 2011 Neil from Nyc asked:

QHow long does it take a rodent to die after consuming Contrac Blox?
I live in a row how with a 1st floor extension (slab on grade), and I thought I had a rat problem, Used Contrac in the Basement, and I baited the ceiling by wire stringing 3 blocks and letting a length of wire hang from the ceiling. Every day, I would check to see if the wire moved. Recently, I noticed that the wire moved about 8 inches into the ceiling and then I heard subsequent scratching later in the day. Now, I keep baiting the ceiling and I keep seeing the wire moving! (It's been about 3 days). I hope it's only one rodent as I heard scratching only in one specific place. Questions. 1. Do rats stop and gnaw or do they drag the food back? I had 3 blocks wired in series and now I can't even see them in the ceiling in the hole that was made. 2. How long does it take for rodent to die? I know that it depends on ingestion, but, if a rodent takes a bite of the bait, will it die eventually? It's been driving me crazy! I will have to eventually crack the ceiling open and look for points of entry, as it is a point of curiosity. It has just turned really cold as well. Any suggestions?

AAfter eating a lethal dose of Contrac Blox it can take 3-7 days for a rodent to die. Rodents will sit and gnaw the bait if it is held in place so that they cannot simply carry it away. If the bait is not secured there is a good chance the rodents will carry it back to their nesting area. We recommend you read our articles How to get rid of Roof Rats and also How to rodent proof your home. Because you live in a row house we also recommend speaking to your neighbors and sharing this information. Without their cooperation you may not be able to control the rodent population around your home.

1 of 1 people found this answer helpful.
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November 9, 2011 Neil from Nyc, Ny asked:

QHow long will it take to Kill a Rat with Contrac?
Road repair on a major street let some rats into my basement, I sealed up all the holes I think and I placed Contrac Bait in bait stations resulting in a kill of at least one rat. It seemed to me that one rat got stuck in the basement ceiling as well after I sealed it back up. I placed Contrac bait in the basement ceiling and I noticed that the 3 blocs moved. I then noticed 2 little fresh droppings around the area of the blocks, presumably eaten. Based on this, do you think the rat ate enough to die? There is no other food sources in the basement ceiling. How can I be sure that I've eradicated all rats in the basement?

AAfter a rodent consumes a lethal dose of the Contrac Blox it can take about a week for the rodent to die. You should keep replacing the bait until you do not have any more activity at the bait station because you could have more rodents than you realize, as is often the case.

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October 27, 2011

QIf I put baits for mice to eat outside the house does that mean that they won't come inside the house and die?
Or is there any other way to avoid them dying in the house?

AUnfortunately there is no way to stop the mice from going inside the house to die after they eat a mouse bait product. If having the mice enter your home after consuming the bait is an issue for you, consider using mouse glue traps placed in a Multi-catch Tin Cat mouse trap  or Mini T Rex Snap traps concealed in a Protecta Mouse Bait Station. This way you will know for sure where the mouse died and you can dispose of the carcass.

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October 7, 2011 Keith from Wa asked:

QHow do I get rid of slugs that are entering my rodent bait stations and eating the bait?
I have six bait stations with Contrac and notice slugs have really taken to eating the bait. Will it control the slugs too, or am I just losing my bait to them? What should I do to keep slugs out if they are not killed by this?

AContrac bait will not have any effect on insects. We recommend that you sprinkle a slug bait around the exterior of the bait stations to control the slugs before they enter the stations. We have several slug baits available including Hi Yield Snail and Slug Bait, Sluggo Plus Snail & Slug Killer and MotherEarth Granular Scatter Bait.

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September 19, 2011 Kme from Lee, Nh asked:

QIs secondary poisoning an issue for cats when using Contrac Blox rodenticide?
We have mice in unfinished areas of our home (garage, basement, and attic) and we have placed bait boxes with Bell’s Contrac in these areas. We are not concerned about primary poisoning with our cats since they not allowed in these areas (and the poison is in boxes that the cats could not even fit into). However, my concern is about secondary poisoning. If a mouse somehow made it to a part of the house where the cats are and one of the cats ate the mouse, could it get secondary poisoning from Contrac? I would really appreciate some feedback as I have received mix answers from asking around, including our vet who was not really sure and suggested we contact you all. Thank you!

AThe risk of secondary poisoning with Contrac Blox is very minimal. A mouse only consumes a very small amount of bait at a time and passes it very quickly only keeping a smaller amount in their liver until they succumb to the effects of the bait. A cat would have to actually eat 20-30 mice that have consumed the bait for it to have an effect. In most cases well fed domesticated animals will not actually eat a mouse or a rat that they come across. Instead they will play with it, chew it and then leave it behind.

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