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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.
Product Documents
| Active Ingredient | Bromadiolone 0.005% |
|---|---|
| Target pests | Norway Rats, Roof Rats, House Mice, Meadow Voles |
| For use in | Agricultural and Animal Production Facilities, Warehousing and Food Processing Plants, Commercial, Industrial, and Residential accounts |
| Application |
Anticoagulant baits are 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 Use in Tamper Resistant Bait Stations or areas inaccessible to non-target animals and children. Change bait every 40-60 days if not eaten to maintain freshness and attractability. Very cold or warm temperatures will mold or sour the bait faster |
| Yield |
Each Blox is 2 in. x 1 in. x 1 in. (28 grams) Each 4 lb. pail contains approx. 64 blox Each 18 lb. bucket contains about 288 bloxs |
| Formulation | Professional Product |
| NOT FOR SALE TO | CA, CT, SC, VT (Restricted To Licensed Applicators Only) |
| 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 |
| 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 | 19.14 lbs |
| Manufacturer | Bell Labs (Mfg. Number: CB4047) |
| EPA Registration | 12455-79 |
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.
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.
Mice like it. But...
By Robert 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?
Expert response:
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218 of 231 people found this review helpful
This stuff is the best!
By Denis on 05/12/2010
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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171 of 176 people found this review helpful
The "TRUTH"
By Tarik on 03/13/2010
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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104 of 106 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
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86 of 88 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.
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79 of 84 people found this review helpful
Do I need to kill off the ants that have invaded my bait station or will the contrac kill them?
I purchased in 2021. Do the Contrac All-Weather Blox Rodenticide expire?
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 dog 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 i,t and then leave it behind.
I am worried my cat may have eaten some of the mouse droppings and we have noticed that there has been very small crumbs of contrac bait left in the are where the mice have obviously eaten the bait and carried a little out of the tamper proof box. the baits are installed properly - we have heard a lot of eating activity. Today we noticed some crumbs (very small) on the floor of the kitchen and we are worried the cat may have licked or eaten a few tiny crumbs
Last time when the exterminator come he just throw a bag behind the stove and freezer without opening
I have had a MAJOR rodent infestation in my garage for years, and just recently my neighbor noticed she had them INSIDE the house, getting into pet food. Well she placed all her goods into rubbermaid bins, and I replaced 2×4's, filled voids, used caulking in the garage. I placed 12 bait stations between the 2 houses. EVERY day I am finding bright green poop, the same color of the contac blocks...they are living long enough to digest the product and poop it all over my garage...at first, I baited the whole garage with the blocks and TONS of green poop. I have only found 2 or 3 dead mice in the garden. They appeared to stop getting into the neighbors house, but I cant seem to keep them out of my garage. I have used glue boards, caught a few, then I actually had a mouse CHEW up half of an entire glue board!! I was awestruck! Do you have any advice on how to truly clean out these things?? I did set up an electronic mouse zapper with peanut butter as bait..
While we typically tell folks not to bait indoors, it sounds like you will need to continue to do so. Contrac All-Weather Blox Rodenticide is a great bait, but you may need something that has a faster knockdown. We would recommend Fastrac to wipe out the current population. Fastrac Blox offers a lethal dose of active ingredient bromethalin in a single feeding, with the first dead rodents appearing in one or two days after bait consumption. Please also take the time to read over our mouse guide to learn more.
Contrac All-Weather Blox Rodenticide is not labeled to be used directly in burrows. It should only be used in tamper resistant bait stations placed in runways, near burrow entrys etc within 100 feet of structures.
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I’m worried that the Contrac shouldn’t be heated and it’s inside my stove top and I’m assuming the insulation too.
Contrac All-Weather Blox Rodenticide would not be used in the oven at all. Itcan be used indoors but it is not recommended as they can die anywhere inside the home & you will not get rid of the smell till the body is found & removed. If they are inside your oven, you will need to take it apart to remove the body/bodies. Indoors we only recommend using snap traps & glue boards as it will hold the body till you can remove it
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I have read the other Q and A about shelf life. I do have an older pail of Contract Bait. The rats are eating it with great enthusiasm, so it still seems to be attractive to them. Does the active ingredient stay effective?
The active ingredient will work as long as the shelf life. The Contrac All-Weather Blox Rodenticide contains food-based ingredients to attract the rodents which is why they will still possibly want to eat the product.
Vitamin k dosage if my dog ate some Contac bloc??
Contrac Blox can be toxic to animals if enough is consumed, although an antidote, Vitamin K1 is readily available from your vet. If you believe your pet consumed any amount of this product, it is important to contact your vet or pet poison control as soon as possible.
I'm in Honolulu, HI and the neighbor attracts rats with an unkept yard, fruit droppings, and an outdoor shed they use storage that gives them a habitat. What product works the best and can you recommend it?
Control may be tough given that the neighbor is providing them with everything they need to live including food and harborage. It is possible the rats may ignore bait since they have an alternate food source. The fastest working bait for a good wipeout is Fastrac. You could then use Contrac blox for maintenance.
He is doing much better. Is it possible the block has been in his stomach that long?
We recommend that you call your veterinarian immediately. We have linked the Contrac All-Weather Blox Rodenticide 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.
Contrac All-Weather Blox Rodenticide would not release any type of fume or gas if it contacts water. Water would just cause the product to be unattractive to rodents as it could mold and sour due to exposure. 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. Rodents are attracted to areas of moisture/areas of water.
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Contrac All-Weather Blox Rodenticide
Rating: 4.6 (298 Reviews / 141 Q&A)
