Contrac Blox Rodenticide

$76.25 - $97.40

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Not for Sale to: AK, CA

4.8 Rating: 4.8

106 Reviews | 58 Q&A 

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Due to New California State restrictions, this product can only be sold to licensed pest control applicators. Please call 866-581-7378 to provide the needed information.

Due to the EPA regulations passed on June 4, 2011, Contrac Blox can now only be sold in at least 16 pounds, which is why we have to sell the 4lb pail by the case.  You can still purchase Fastrac Blox and Terad3 Blox in 4 lb pails.

$97.40$91.87$76.25$73.59$71.76
  Size/Description Price/Ea. Qty  
Contrac Blox Rodenticide box(es) (4 x 4 lb. pails)

Buy 1: $97.40 each

Buy 2 or more: $91.87 each

$97.40
Contrac Blox Rodenticide - 18 lb. Pail 18 lb. bucket

Buy 1: $76.25 each

Buy 2 or more: $73.59 each

Buy 4 or more: $71.76 each

$76.25
Total Price: $0.00


Availability: Normally ships in 1 business day.
For large order quotes, please call us at 1-866-581-7378.

Contrac Blox Rodenticide

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. Secondary poisoning is very minimal with Contrac as an antidote to the poison (vitamin K1) is readily available. We recommend placing the blox in tamper resistant mouse bait stations or rat bait stations to protect the bait from non-target animals such as dogs and cats.


Active Ingredient: Bromadiolone .005%
Target pests: Norway Rats, Roof Rats, House Mice
For use in: Agricultural and animal production facilities, warehousing and food processing plants, as well as for commercial, industrial, and residential accounts
Application: Recommend changing bait out every 40-60 days if not eaten. Very cold or warm temperatures will mold or sour the bait faster. Apply bait in locations out of reach of children, pets, domestic animals and nontarget wildlife, or in tamper-resistant bait stations.
Pet safe: Contrac is LESS toxic to non-target animals in both primary and secondary poisoning situations than other single-feeding baits. An antidote, Vitamin K1 is readily available and there is a time factor for treatment. Used in tamper resistant bait stations or areas inaccessible to non target animals and children.
Yield: Each 4 lb. pail contains approx. 64 (28 gram ea) 2 in. x 1 in. x 1 in. blox.
Each 18 lb. pail contains about 288 blox.
NOT FOR SALE TO: AK, CA
Shelf Life: If unopened and sealed, product will last 2-3 years if kept away from extreme temperatures. Once opened, should last a year in normal conditions
Coverage Area: All bait placements must be inside or within 50 feet of buildings.
Color: Blue Blox
Special Features: Multiple edges appeal to a rodent's desire to gnaw, are made with food-grade ingredients and small amounts of paraffin for a highly palatable bait, holds up well, particularly in adverse or moist conditions, superior rodent acceptance and control including control of Warfarin-resistant rats, LESS toxic to non-target animals in both primary and secondary poisoning situations
Time to Kill: Single feed, 1-5 days
Manufactured By: Bell Labs (Manufacturer Product Number: CB4047)



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 mouse bait stations or rat 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.

Rating Snapshot

5 stars   86
4 stars   17
3 stars   1
2 stars   1
1 star   1

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4.8 star rating (106 reviews)

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Most Helpful Customer Reviews
  • 52 of 58 people found this review helpful:

    5 of 5 Stars  Mice like it. But...
    By Robert in Upper Darby PA 19082 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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  • 44 of 45 people found this review helpful:

    5 of 5 Stars  This stuff is the best!
    By Denis in Washington, DC 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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  • 28 of 28 people found this review helpful:

    5 of 5 Stars  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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  • 24 of 24 people found this review helpful:

    5 of 5 Stars  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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  • 18 of 20 people found this review helpful:

    5 of 5 Stars  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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Most Recent Customer Reviews
  • 2 of 2 people found this review helpful:

    5 of 5 Stars  Perfect truck size
    By Spiderman in West of the Nation on April 24, 2015
    Verified Purchase

    Perfect size for service trucks. 18 lbs is usually what I purchase but I wanted a smaller container Best bait I have used. Tried all different brands of bait and mice rats always go for Contrac first when different products are placed inside bait stations.

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  • 1 of 1 people found this review helpful:

    5 of 5 Stars  Great Customer Service!
    By Peter in St. John, VI on April 23, 2015

    When my order arrived damaged with most of the product lost, Crystal in customer service came through and had a new pail in the mail the next day. Thank you Crystal!

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  • 1 of 1 people found this review helpful:

    5 of 5 Stars  killer blox
    By Abdul in New York on March 8, 2015

    This product works pretty good. There is no more running mice in my basement. The interesting part of this product is that rodent love to eat these blox, and thats the plus point of this purchase. I had this whole bucket of blox and this will work for long time. Strongly recommended !!

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  • 1 of 1 people found this review helpful:

    4 of 5 Stars  I think it's working
    By Joe in Boston, MA on February 6, 2015

    I've purchased this product twice now and I believe it is effective. The rodents enjoy the product and after they devour the contents of a bait box, I see fewer of them around the target area. The only reason I haven't given this five stars is I'm not sure how many pounds of Rodenticide I have to feed to the neighborhood rats before they all just go away. The answer may be hundreds of pounds over time. The bait I received came promptly and smells good and fresh.

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  • 2 of 2 people found this review helpful:

    5 of 5 Stars  contrac
    By Bernadette in santa rosa new Mexico on January 26, 2015

    We have been using this product for about 3 years and are very pleased with the results we get. Thanks

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  • 2 of 2 people found this review helpful:

    5 of 5 Stars  great product
    By Cliff in Toronto, Ks on December 6, 2014

    I place Contrac in my bait stations with Final. Rodents seem to prefer the Final over the Contrac but, they still eat the Contrac, which does a very effective job, and I like to give the rodents on my farm a choice of their poison.

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  • 1 of 2 people found this review helpful:

    5 of 5 Stars  Excellent product
    By Cliff in Toronto, Ks on November 3, 2014

    very good and effective product, but Final is a little better from my observations.

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  • 3 of 3 people found this review helpful:

    5 of 5 Stars  Rats are gone
    By Gary in Odessa, Florida on October 14, 2014

    This product works well, we see very little activity going on within the bait stations, and have not seen signs of rodents inside our shop after giving this product time to work. This is our second purchase of this product and we will continue using it.

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  • 2 of 2 people found this review helpful:

    5 of 5 Stars  PERFECT EXTERMINATION!
    By Gisele in Orange Park, Florida on September 7, 2014

    I am so happy with this product and seller. It has eliminated a highly rat infested garage. Seller was quick to ship etc. You will NOT be disappointed.

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  • 1 of 2 people found this review helpful:

    5 of 5 Stars  Affordable protection in bulk
    By Charles in Walnut Ridge, Arkansas on December 3, 2013

    This is my second time to purchase the 18# pail of mouse bait. I'm in the mini storage business and this size package provides me with my most affordable option for rodent control, especially when you factor in the quality of the bait.

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Most Helpful Q&A's

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.

46 of 49 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.

26 of 26 people found this answer helpful.
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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 Bellís 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.

16 of 17 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.

14 of 16 people found this answer helpful.
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March 9, 2010 Monte asked:

QHow long do the Contrac Bloxs 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.

13 of 14 people found this answer helpful.
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Most Recent Customer Questions

July 2, 2015 Andrew from Brockville, Ontario asked:

QHow lethal is Contrac Blox if injested by a canine?
Just wondering if my math is right each blox contains about 1.4mg of Bromadiolone? and bromadiolone is lethal at 10mg per 1 kg body weight? so a 10kg dog would need to eat roughly 70 blox to be fatal? 0.005% of (28 grams) = 1.4 milligrams

A Each blox of Contrac is 28 grams which equal 2800mg. If your pet ate an actual blox, I wouldn't take the chance of figuring it out because the minimum amount could be lethal. It would be best to take your pet to the vet and have him/her take a look and/or administer the antidote which is Vitamin K1.

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March 30, 2015 Nate asked:

QWould an anticoagulant rodenticide kill an insect?

A It is a poison so if it is injested, it is likely to harm whatever is injesting it.

0 of 1 people found this answer helpful.
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March 14, 2015 Alex from Cincinnati asked:

QIf I get Contrac Blox, can u tell me if the mice or rats will die in walls or will they go outside to die?
I live in an apartment and would like to know what I'm facing here. Place is infested!

A Rodents that eat the ContracBlox will not neccessarily go outside to die. There is a high possibility they will die indoors and then you will be dealing with a very foul odor for atleast a few weeks. We would recommend trapping rodents indoors using snap traps or glueboards. Trapping eliminates odor problems by allowing you to dispose of the carcass. Please read over our article regarding eliminating rodents indoors.

2 of 2 people found this answer helpful.
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December 2, 2014 Tom from Medina, Oh asked:

QAllergy Reactions to Smelling Contrac Bait Blox
I understand the Contrac bait blocks do not give off a vapor, correct? Is it still possible for the odors from the bait when placed into an attic to weep through drywall and cause a reaction to a child (living in a room below the attic) who is highly allergic to various foods?

A Contrac Blox Rodenticide do not emit any type of vapor. This product should not cause a reaction to a child unless they come in direct contact with it. Contrac Blox should be placed in tamper resistant bait stations. It will pose no threat to humans if it is used as directed.

2 of 2 people found this answer helpful.
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September 30, 2014 David asked:

QInsects eating Contrac Blox Rodenticide
I have Contrac Blox Rodenticide inside Protecta Evo Ambush bait stations, and it appears that insects are eating the bait. I put these out last year, and I didn't notice any signs of insects eating the bait at that time (I change the bait every 4 months). Recently, all of the bait was gone, and I replaced it and rechecked the next week to find them covered in insects. Any ideas/suggestions?

A Insects are trying to fatten up for the winter. It is not uncommon for insects to be more attracted to rodent bait like Contrac. We recommend to sprinkle Niban Bait around the outside perimeter of the bait station to keep the insects out.

1 of 2 people found this answer helpful.
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July 29, 2014 David from Transfer Pa.16154 asked:

QI need a good bait to control rats and mice. I also need something for spiders on my farm.
I have been using a rat bait from Agway,and it is not doing what I want it too do. I am tired of the spiders in my shops and the basement of the house. I would like too try a good rodenticide. Any good recommendations?

A

For a rodenticide, we would recommend Contrac Blox. It is a single feed kill. It comes in an 18 lb. pail. We would recommend putting these in rat bait stations, such as Protecta Rat Bait Stations. If you are in CA, we would recommend Fastrac Blox. Although they are not a single feed kill, they still will work wonderfully.

For spiders, we would recommend using Bifen IT. This can be sprayed indoors and outdoors. It does have a residual of about 90 days indoors and 30 days outdoors. Indoors, it needs to be sprayed in the cracks and crevices and along the baseboards. Outdoors, this product can be used around the perimeter, in the lawn, on shrubs, trees and on flowers. This product should be used on edibles.

1 of 1 people found this answer helpful.
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July 25, 2014 Rene from Waco Tx asked:

QCan Contrac blox kill roaches
i have baited my whole residence with these blox i cannot say for sure if the mice are eating it but the roaches sure eating it and i am wondering if they can die from this.

A Contrac Blox Rodenticide uses human food grade attractants. There is potential for roaches to be attracted to the sent. Yes, they could harmed from eating the poison. To treat for roaches, we recommend to use one of our Roach Control Kits.

1 of 1 people found this answer helpful.
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July 20, 2014 Tony from Lufkin,texas asked:

QHow many roof rats will one block of contrac kill?

A Contrac Blox is a single feed rodenticide. Single feed means a rodent can consume a lethal dose of Bromadiolone in 1 feeding therefore resulting in death within 1-5 days. The number of rodents that 1 block will treat is undeterminable. 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. 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. 

3 of 3 people found this answer helpful.
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June 14, 2014 Kristin from Old Lyme, Ct asked:

QHow long is the shelf life of the Contrac Blox Rodenticide?

A

Contrac 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.

2 of 2 people found this answer helpful.
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May 29, 2014 Matt from United States asked:

QI don't know what type of rodent problem I have?
I Have had a rodent problem since last year. It went away and just came back this week. I tried all the mouse traps and decon in the World but it did not kill it. Can you please identify what rodent I'm dealing with and the killer I need? Here is a picture of it's poo: http://imgur.com/TNGQgOv (I know how lovely)

A We apologize, we could not open that link. We would recommend to please send us a clear picture of the rodent droppings or contact your Cooperative Extension Office.

0 of 2 people found this answer helpful.
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