Why Shop with Us
Customers also Bought:
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, Meadow Voles|
|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:||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.|
|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|
|Shipping Weight:||19.80 lbs|
|Manufactured By:||Bell Labs (Mfg. 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.
See all 146 reviews »
62 of 68 people found this review helpful:
Mice like it. But...
By Robert in Upper Darby PA 19082 on 02/24/2009
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?
The fact that the bait is being eaten every day is a good sign. Mice will not die immediately after eating rodenticide baits, and will probably die somewhere out in the field on their way back to the burrow. Contrac lasts about 2 years in the bucket. When placing the bait, the manufacturer recommends that the bait be changed out every 40-60 days.
54 of 55 people found this review helpful:
This stuff is the best!
By Denis in Washington, DC on 05/12/2010
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@!.
37 of 37 people found this review helpful:
Mice are gone!
By Tom on 08/23/2005
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
32 of 32 people found this review helpful:
By Tarik on 03/13/2010
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!!!!!!!!!!!!!!
26 of 28 people found this review helpful:
Best I have seen
By Harold on 11/09/2006
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.
7 of 10 people found this review helpful:
By Sid in DC on 09/26/2015
I have a small bricked in patio 18x18 with a planterbed all the way around....for 18 years i have fought rats on and off and they never go away entirely no matter how vigilant. One of the problems is that this poison will never kill an entire group. I think it is a combination of things - but two things have become clear to me...rats are smart and this productis too watered down. The poison that is sold to regular consumers is weak. The good stuff (white powder version) that they walk in and then groom eachother back in the next, is the same but at a much stronger concentration...BUT IT IS NOT SOLD TO ANYONE WITHOUT A SPECIAL CERTIFICATION. This results in a situation in which you can't get enough of it to do the job because pest control guys put out only a little which has the effect of increasing their business. Sorry to be so cynical...but after 18 years of this problem...i am confident about what i am saying.
We are sorry to hear you are having such a hard time controlling the rodent population on your property. Please don't be discouraged in your efforts! Contrac is not a consumer product, it is a professional product used by pest control companies. Having said that, we would recommend you use a product that has a much faster kill to wipe out the rat population quickly as you seem to live in a high population area. Fastrac works within 12-24 hours. Contrac by comparison can take up to 7 days. You should also make a few environmental changes to make your home less favorable to these rodents. You can learn more about these changes by reading our Rat Treatment Guide and our Rat prevention Guide: http://www.domyownpestcontrol.com/how-to-get-rid-of-rats-a-525.html http://www.domyownpestcontrol.com/rat-prevention-guide-a-526.html Please let us know if we can be of further assistance after you review these guides. We are always happy to help!
8 of 8 people found this review helpful:
The problem is gone!!!!
By Katya in Lynn MA on 04/26/2013
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%.
7 of 22 people found this review helpful:
Does Not Help
By Sheila in Shreveport, LA on 07/11/2012
The rodent population in my yard think Contrac Blox Rodenticide is a joke. I see no evidence that any has been consumed and the "crew" did not seem to have any intention of leaving until I called the professionals. Terminix has been called in and will guarantee their work inside and out. This is what I should have done in the first place. Since Terminix did their treatment things are improving and they will also remove any "bodies" and return as often as needed without additional charge. Return policy is terrible. Products must be unopened to be returned. How do you know if the product is reliable until you try it? Satisfaction is not guaranteed at DoMyOwnPestControl. So if you decide to place and order remember Caveat emptor "Buyer Beware"!
9 of 9 people found this review helpful:
Why buy at home centers?
By Jerry in Roseville, CA on 03/02/2011
The price is way cheap compared to the home centers. Delivery is free and fast. What else is there to say?
13 of 15 people found this review helpful:
Contrac Blox Are the Best!
By Jim in El Cajon, CA on 08/09/2010
I have a rat phobia and NEEDED a product that worked. Contrac-Blox is it! One problem, though. I live in an avocado grove and had a bad infestation. Each morning, all six boxes of poison was empty and I would fill them up daily. When the UNTOLD NUMBER of rats began dying a few days later, my property smelled horrible for two weeks. Simple fix: With a bad infestation, only replace the bait every four or five days or use less bait stations. That should meter the number of dead rats and any given time to minimize any unfavorable odors. It might take an extra week or two to kill them all, but the olfactory aesthetics might be worth it! Bottom line: Contrac-Blox works very well, just don't overuse it, or it works TOO well!!! And, that is good!
8 of 8 people found this review helpful:
By Bob in san diego, ca on 06/08/2010
The Contrac Blox Rodenticide is keeping rats out of my house and out of my yard. It is easy to use, and rats love it. An additional benefit (in my opinion) is that small ground squirrels which were undermining my hill, worked their way into one of the bait stations and the Contrac blox got rid of them as well.
14 of 14 people found this review helpful:
No more mice. Period.
By Doc in NYC suburb on 05/26/2010
Mice became "midnight visitors" in our custom house, along with our neighbors, once a large tree near our property was felled. On our block, we just don't get mice, or any other unwanted intruders, so we became unsettled thinking we were living among these little guys. We tried havahart traps, tin-cats, snap traps, just about the whole kitchen sink but we still saw one or two around, knowing that meant there were many more nearby. We hired not one, but 2 exterminators on several different occasions who assured us that their poison (Warfarin) would do the trick. Again, it helped a little, but there was more work to be done. These "blox" did it. 10 days, no more mice. It's that simple. We didn't want to poison them, but at some point, knowing they were living amongst us and seeing droppings in our baby's room sealed the deal. If you truly want to be rid of "tough" resistant NYC mice, this is the product. Hands down.
11 of 13 people found this review helpful:
Works very well at reducing mice population
By Bill in New York, NY on 12/12/2008
Contrac Blox Rodenticide works very well in reducing the mouse population. However, I have not been able to rid myself of mice completely. It has been 3 months and I have put out more bait and thrown out stale bait. How long before the bait gets stale anyway? Any tips from anyone would be appreciated.
Since it is a food source, bait will spoil. A cool and dry environment will help prolong the shelf life.
9 of 9 people found this review helpful:
Works great for mice
By K.r. on 08/28/2008
Contrac Blox Rodenticide works great in controlling mice at a mountain cabin.
8 of 8 people found this review helpful:
Must be good
By Eddie on 07/08/2007
It must be good. The rats chewed through the plastic lid of the Contrac Blox bucket which I had left hanging off the peg board wall.
Have a question about this product?
Ask our product experts...
Ask a Question
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.
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?
A Contrac 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.
Contrac 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.
09/19/2011 Kme from Lee, Nh
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.
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.
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.
07/02/2015 Andrew from Brockville, Ontario
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
AEach 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.
QWould an anticoagulant rodenticide kill an insect?
AIt is a poison so if it is injested, it is likely to harm whatever is injesting it.
07/20/2014 Tony from Lufkin,texas
QHow many roof rats will one block of contrac kill?
AContrac 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.
01/29/2014 Nick from Vancouver, Bc
QWill Contrac attract rats from the neighbourhood?
How attracted rats are to the Contrac Blox? A pest control guy suggested that it wouldn't be a good idea to preventatively use baiting station with Contac. He said that it may attract rats that otherwise wouldn't be around the house. Is this right? Would it really attract rats from, say, 10-20 yards away? Thanks.
01/20/2014 David from Bronx,newyork
QI have a mouse avoiding the fresh bait i just laid out what should i do?
It's in the kitchen in the stove, I placed a bait station behind the stove along with glue boards under the stove.
A Below is a few helpful hints for baiting Mice.
Below is a few helpful hints for baiting Mice.
11/17/2013 Lori from Washington, Dc
QWill you modify the Contrac so it stops killing owls and other predators?
I am concerned about the numbers of raptors dying from secondary poisoning after eating poisoned rodents. The anti coagulant in Contrac blocs will also kill owls, and other raptors as well as mammalian predators that eat poisoned rodents. Will you change the formula so it is environmentally friendly and doesnt kill much needed predators?
AWhile we are not the manufacturer of the Contrac blox we do carry another product that is for use in areas where secondary poisoning of predatory birds are an issue. Terad3 rodenticide is usually used in areas where secondary poisoning is a concern because it has a reduced risk of secondary poisoning.
QI think my 10 lb dog ate a piece the size of a dime. Will it hurt him??
AWe recommend that you call your veterinarian immediately. We have linked the Contrac Blox product label and the Contrac Blox MSDS for you in our answer so that you may print them out and provide them to your vet.
QIs there a rodent bait that is recommended for pack rats in Arizona?
I found an active pack rat infestation next to our property in Arizona. What is your suggestion with regard to the most efficient method to get rid of them? I already have the Protecta Baiting station that I use with a T Rex Trapper. I would rather not kill them individually with a trap. Is there a poison that would do the trick?
AYou can use any of our rodenticides such as Contrac Blox to eliminate pack rats. You should place the Contrac Blox inside of tamper resistant stations to secure the blox so that the rats can not carry them away to unsecured locations. Be sure to place plenty of stations out as this type of rat can be territorial and will stop other rats from visiting certain stations.
QWhen the mouse eats the Contrac and then goes off to die, does the decomposing mouse body smell?
AYes. There is not a rodenticide on the market that stops a decomposing rodent from smelling after they die. There are a lot of "old wives tales" that suggest that there are rodenticides that will make a rodent exit the building after they eat the bait, leave in search of water or dry up immediately after death and leave no stench behind. Unfortunately, none of this is true. If a rodent dies, it will smell as it decomposes and the rodent will die wherever it succumbs to the poison which is likely to be is an inaccessible area where the rodent has been nesting. We recommend using glue boards, snap traps or multi-catch mouse traps indoors, so you will know exactly where the mouse has died and can remove it with ease.
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?