Contrac Blox Rodenticide

$76.25 - $91.50

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Not for Sale to: AK, CA

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.

$91.50$88.84$76.25$73.59$71.76
  Size/Description Price/Ea. Qty  
Contrac Blox Rodenticide box(es) (4 x 4 lb. pails)

Buy 1: $91.50 each

Buy 2 or more: $88.84 each

$91.50
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



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   78
4 stars   16
3 stars   1
2 stars   1
1 star   1

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Average Customer Rating
4.7 star rating (97 reviews)

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Most Helpful Customer Reviews
  • 51 of 56 people found this review helpful:

    5 of 5 Stars  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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  • 40 of 41 people found this review helpful:

    5 of 5 Stars  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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  • 25 of 25 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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  • 20 of 20 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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  • 17 of 18 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
  • 0 of 1 people found this review helpful:

    5 of 5 Stars  Affordable protection in bulk
    By Charles 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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  • 1 of 1 people found this review helpful:

    4 of 5 Stars  Contrac Blox Rodenticide
    By Gary on November 29, 2013
    Verified Purchase

    I have been using Contrac Blox for several years, and its performance has exceeded my expectations. Used in bait stations, it has resulted in no evidence whatsoever of the field rats that formerly caused several thousand dollars in vehicle repairs (gnawed electrical wires of all types). We use four bait stations in a carport and another four in a two-car garage. It is simple and quick to load the bait stations, and to check the stations periodically.

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  • 2 of 2 people found this review helpful:

    5 of 5 Stars  Contrac Blox Rodenticide
    By Dan on October 30, 2013

    I have been using this product for over five years. I haven't had any mice in the house during this time frame. An important feature for me is that it is pet safe.

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  • 0 of 1 people found this review helpful:

    5 of 5 Stars  Purchase Bait Stations Also!
    By Ali on October 12, 2013

    Product worked great but the purpose of my review is to encourage folks to buy the bait stations also, even if you don't have animals or children that might be harmed by the poison itself. Don't be an idiot like I was and purchase only the poison blocks. The amount of poison I've gone through since purchasing the bait stations has dropped to a tenth of what it was (the rats were hording) and the poison has been, subjectively, more effective--we live in a rural area and I think new rats and mice find the poison right away whereas before if a rat had collected it all, I had to put more down for new rats and mice to find.

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  • 4 of 5 Stars  Great product, good price...
    September 3, 2013

    It works well against both mice and raats. I highly recommend buying/using bait stations where the bait can be locked inside.

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  • 1 of 1 people found this review helpful:

    5 of 5 Stars  Contrac Blox
    August 27, 2013

    I had used the Contrac before with good results. I switched to Terad to save money due to the larger qty requirement of Contrac. Terrible results from Terad. Switched back to Contrac after my rodent problem got bad again. Instant results. Within days dead rats began to show up. Can't beat it.

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  • 1 of 1 people found this review helpful:

    5 of 5 Stars  good stuff
    July 7, 2013

    The rats love it to death!! Put out six stations filled with contract and in 5-6 days the lawn at the edge of the woods has the unmistakable sweet smell of death. Decomposing rats. No more problemo!

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  • 1 of 1 people found this review helpful:

    5 of 5 Stars  Contrac Blox
    June 6, 2013

    We have been using Contrac Blox Rodenticide for a year and just purchased a second pail of Blox. We live in the country and this product has done a good job of keeping the ground squirrels and mice away from the house. If we don't have the Blox out the rodents are at the front door, in the garage and under foot.

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  • 1 of 1 people found this review helpful:

    5 of 5 Stars  Contrac Blox Rodenticide - 18 lb. Pail
    By John on May 21, 2013

    I works like it should.

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  • 4 of 4 people found this review helpful:

    5 of 5 Stars  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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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.

42 of 45 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.

19 of 19 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.

11 of 13 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.

9 of 9 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?

8 of 8 people found this answer helpful.
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Most Recent Customer Questions

April 5, 2014 Richard from Toronto, Ontario, Canada asked:

QDoes Contrac give off any vapors when placed inside the home, and if so, are the harmful to humans?
We placed 11 contrac blocks in the attic of our house to get rid of mice, and are concerned about possible effects of the vapors on us. We also placed several stations baited with Contac in the kitchen and basement. Is this safe for humans?

A Contrac is a block rodenticide that does not release any vapors. If applied in tamper resistant bait stations it should pose no harm to humans if applied as directed.

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April 2, 2014 Steve from Baltimore,maryland asked:

QTreating rats in my yard. They are going inside of holes

A When treating for rats outdoors, we always recommend that you use tamper resistant bait stations that will help stop accidental poisonings of non-target animals and children no matter which bait you select.  Please take a moment to read our article for baiting tips for rats. We would recommend to use Contrac blox which will kill the rats within 1-5 days after a single feed.

1 of 1 people found this answer helpful.
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January 29, 2014 Nick from Vancouver, Bc asked:

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.

A

Yes, the mice and rodents in the area will be attracted to the Contrac Blox as they are made of a variety of very attractive food based ingredients for the rodents to want to feed on. Any rodents looking for a food source would want to go to the bait in the stations.

3 of 3 people found this answer helpful.
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January 20, 2014 David from Bronx,newyork asked:

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.

  • Always use fresh bait. Rodents will avoid old, moldy, or insect-ridden baits.
  • When baiting for mice, a good measure for distance between placements is 8 to 12 feet apart for light to moderate infestations. Heavy or severe infestations may require placements of 4 to 8 feet.

  • As a rule, many bait placements containing smaller amounts of bait are more effective in mouse control than a few placements containing a lot of bait.

  • For heavy infestations, use the maximum number of bait placements indicated by the label.

  • Bait stations should be placed where mice are likely to encounter them during their routine travels, between harborages and food sources.

  • Corners are "hot spots" for bait placements since mice tend to spend a lot of time in darkened corners.

  • Attempt to locate "favorite feeding locations" (indicated by a high concentration of rodent signs-droppings, tracks, odors, shredded paper, etc.) and replace existing food sources with bait stations in these locations.

  • Always use mouse-sized bait stations, not the larger stations designed for rats.

  • Mice often live above or below their food sources, in attics or basements, so bait placements should not be limited to a single level of the infested structure.

  • Mice develop preferences for certain types of foods and baits. If there appears to be bait avoidance, try placing 3 or 4 different bait formulations (pellets, place packs, bait blocks, liquid bait) to see if the mice will prefer one formulation over another.

  • If a bait placement remains unvisited upon inspection, try moving the placement five feet in another direction.

2 of 2 people found this answer helpful.
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November 17, 2013 Lori from Washington, Dc asked:

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?

A While 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.

2 of 2 people found this answer helpful.
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November 11, 2013 Patrick from Deltona Florida asked:

QDoes Contrac contain glass?

A Contrac does not contain glass. It contains food based ingredients that attract the rodents to the bait for consumption. It 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.

0 of 1 people found this answer helpful.
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October 29, 2013 Mary from Reseda, Ca asked:

QRoof Rats are stealing my bait. How long does it take for Contrac blocks to break down outside?
I am trying to make sure how long the bait will take to biodegrade outside so I do not have to be concerned about friend's pets in my backyard. Will rain accelerate the process?

A There is no defined time for the Contrac Blox to breakdown. The more moisture and direct sunlight the exposed blocks receive, the faster they will breakdown. The actual active ingredient will last until the bait has disintegrated. For future baiting it is important to secure the bait so that it cannot be carried off. If baiting in an inaccessible area you can lace the blocks on to a thick wire so it cannot be moved. If the bait is used in an exposed areas you can secure it in tamper resistant bait stations.

1 of 1 people found this answer helpful.
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October 12, 2013 David from Bronx,ny asked:

QHow long is the potency of the Contrac if a mouse ate this bait that laid out for six months will it die?

A Contrac bait should be stored at room temperature and replaced every 40-60 days in the bait stations because it contains food based ingredients. The bait could mold or sour in the hot or cold months (should be replaced every 30 days during the summer and winter) and may be less palatable to the mice. It should eradicate the mice if they consumed enough of the bait.

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September 27, 2013 David from Bronx,ny asked:

QCan this product be used outdoors?

A Contrac can be applied outdoors if applied in a bait station for rats or mice.

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September 27, 2013 David from Bronx,ny asked:

QDoes the Contrac Blox Rodenticide stop reproduction of mice?

A The Contrac Blox does not stop the reproduction of rodents.  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.

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