--- product_id: 28150664 title: "Contrac Blox 4lbs" brand: "bell laboratories" price: "€ 110.65" currency: EUR in_stock: true reviews_count: 8 category: "Bell Laboratories" url: https://www.desertcart.de/products/28150664-contrac-blox-4lbs store_origin: DE region: Germany --- # Single-feed lethal dose Blue color for easy ID Weather-resistant formula Contrac Blox 4lbs **Brand:** bell laboratories **Price:** € 110.65 **Availability:** ✅ In Stock ## Summary > 🔵 Lock in your rodent defense with the bait they can't resist! ## Quick Answers - **What is this?** Contrac Blox 4lbs by bell laboratories - **How much does it cost?** € 110.65 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/28150664-contrac-blox-4lbs) ## Best For - bell laboratories enthusiasts ## Why This Product - Trusted bell laboratories brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **One-Feed Knockout:** Rodents get a lethal dose in just one bite—fast, efficient control. - • **Precision Placement:** Pre-drilled hole for secure mounting in tamper-resistant stations. - • **Professional-Grade Safety:** Blue color for clear identification and compatibility with secure bait stations. - • **Unmatched Weather Durability:** Stays potent rain or shine, no crumbly mess. - • **Broad-Spectrum Rodent Control:** Effective on mice, rats, and warfarin-resistant Norway rats alike. ## Overview Contrac Blox 4lbs is a professional-grade, weather-resistant rodenticide bait containing Bromadiolone. Designed as 1-ounce blue blocks with a center hole for secure placement, it delivers a lethal dose in a single feeding to mice, rats, and warfarin-resistant Norway rats. Its palatable, wax-based formula withstands wet and dry conditions, ensuring long-lasting effectiveness in tamper-resistant bait stations for clean-out and maintenance. ## Description Contrac Blox is a single feed bait rodent bait(Bromadilone) that is weather resistant. Contrac Blox are 1 ounce blocks with a center hole. Contrac Blox is colored blue for easy recognition as a non food item Contrac Blox is an excellent clean-out and maintenance bait to control mice and rats, including warfarin-resistant Norway rats. Outstanding Rodent Acceptance CONTRAC All-Weather BLOX is a single-feeding anticoagulant rodenticide containing the active ingredient, Bromadiolone. Unsurpassed in rodent acceptance and control, CONTRAC BLOX is an excellent clean-out and maintenance bait to control mice and rats, including warfarin-resistant Norway rats. CONTRAC BLOX is specially formulated with an optimal blend of food-grade ingredients and a small amount of paraffin. The result is a highly palatable, yet weatherable, bait that works well in wet and dry conditions. Rodents can consume a lethal dose in just one feeding. Bait shyness is not a problem with CONTRAC because mortality occurs a few days after bait is consumed.For ease of use, a hole in the center of the BLOX lets technicians place it on bait securing rods in tamper-resistant bait stations, or nail or wire the BLOX in place. The antidote, Vitamin K1, is readily available and there is a time factor for treatment. Review: The "Last Supper" for My Uninvited Guests - If you’re using the Key-Required Bait Stations, you need a "main course" that actually delivers. I paired them with Contrac Blox, and let’s just say the local rodent population has effectively been served its eviction notice. This stuff is the gold standard for a reason. The "Irresistible" Factor I’ve tried other hardware store baits that the mice seemingly walked right past, but they can’t seem to resist Contrac. The wax blocks are designed with multiple edges, which satisfies their need to gnaw while delivering the goods. I’ve noticed a significant drop in activity within just a few days of loading up my stations. It’s effective, efficient, and doesn't leave me guessing if it's working. Designed for the Long Haul What I appreciate most is how these blocks hold up. Living in the Midwest, I need something that can handle a bit of humidity or temperature swings without turning into a crumbly mess. These blocks stay intact inside the stations, meaning the bait stays fresh and appetizing for the targets until it's gone. Plus, the pre-drilled hole in the center makes it a breeze to slide them onto the securing rods in the bait stations. They also fit perfectly in the stations where they are supposed to. They also dont stink like many of the over the counter options and the bucket seals nicely. Safety First Because I'm using these in a 12-pack of locking stations, I feel much better about the whole operation. The blocks stay locked inside, away from pets and curious hands, while the "all-weather" formula ensures they don't degrade. It’s a professional-grade setup that gives me total peace of mind in my garage and storage areas. The Verdict: If you’ve invested in the stations, don't skimp on the bait. Contrac Blox is the real deal. It’s tough, it’s attractive to pests, and it gets the job done the first time. My pantry and workshop are finally defended properly. Review: Very Effective - Very effective. Definitely better than what you can get at feed stores and discount stores. But be careful in how you use it. This stuff will kill anything that eats it, including your pets. It's what professional pest control businesses use. ## Features - Active Ingredient: Bromadiolone Rodents can consume a lethal dose in just one feeding - Each bait blox weighs approximately one ounce. Highly palatable, yet weatherable, bait that works well in wet and dry conditions. - 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. - Packaging: 4x 4 lbs ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B005SEADJ6 | | Best Sellers Rank | #5,253 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #80 in Pest Control Baits & Lures | | Brand Name | Bell Laboratories | | Customer Reviews | 4.4 4.4 out of 5 stars (189) | | Item Weight | 4 Pounds | | Manufacturer | Bell Labs | | Model Number | CB4047 | | Part Number | 1740143000 | | Target Species | Rat,Mouse | | UPC | 030835401055 | ## Product Details - **Brand:** Bell Laboratories - **Item Weight:** 4 Pounds - **Target Species:** Rat,Mouse - **UPC:** 030835401055 ## Images ![Contrac Blox 4lbs - Image 1](https://m.media-amazon.com/images/I/81bmdIIjE1L.jpg) ## Questions & Answers **Q: Can we order 1 4lb pail? or 2? i don't need 4...** A: I couldn't. Have a bunch left over after infestation eliminated. **Q: I'm looking to purchase just one 4lb pail, is this possible? I used one 4lb pail that lasted me several years so 4 of these is too much.** A: I was not able to find just the one bucket. You should be able to do that at a local retail establishment. **Q: How long will this last? I mean how many blocks are there?** A: I not sure how many blocks but it works great!! We had a bad mouse problem not now! ## Customer Reviews ### ⭐⭐⭐⭐⭐ The "Last Supper" for My Uninvited Guests *by S***S on February 4, 2026* If you’re using the Key-Required Bait Stations, you need a "main course" that actually delivers. I paired them with Contrac Blox, and let’s just say the local rodent population has effectively been served its eviction notice. This stuff is the gold standard for a reason. The "Irresistible" Factor I’ve tried other hardware store baits that the mice seemingly walked right past, but they can’t seem to resist Contrac. The wax blocks are designed with multiple edges, which satisfies their need to gnaw while delivering the goods. I’ve noticed a significant drop in activity within just a few days of loading up my stations. It’s effective, efficient, and doesn't leave me guessing if it's working. Designed for the Long Haul What I appreciate most is how these blocks hold up. Living in the Midwest, I need something that can handle a bit of humidity or temperature swings without turning into a crumbly mess. These blocks stay intact inside the stations, meaning the bait stays fresh and appetizing for the targets until it's gone. Plus, the pre-drilled hole in the center makes it a breeze to slide them onto the securing rods in the bait stations. They also fit perfectly in the stations where they are supposed to. They also dont stink like many of the over the counter options and the bucket seals nicely. Safety First Because I'm using these in a 12-pack of locking stations, I feel much better about the whole operation. The blocks stay locked inside, away from pets and curious hands, while the "all-weather" formula ensures they don't degrade. It’s a professional-grade setup that gives me total peace of mind in my garage and storage areas. The Verdict: If you’ve invested in the stations, don't skimp on the bait. Contrac Blox is the real deal. It’s tough, it’s attractive to pests, and it gets the job done the first time. My pantry and workshop are finally defended properly. ### ⭐⭐⭐⭐⭐ Very Effective *by S***R on March 19, 2026* Very effective. Definitely better than what you can get at feed stores and discount stores. But be careful in how you use it. This stuff will kill anything that eats it, including your pets. It's what professional pest control businesses use. ### ⭐⭐⭐⭐⭐ Perfect to maintain a lot of bait boxes *by M***R on February 26, 2026* Just use your nitrile gloves and pair this with a good bait box to protect other animals your not targeting. Wash up after setting it. 🤞 Hopefully I won't ever have to deal with rodents again..... ## Frequently Bought Together - Contrac Blox 4lbs - Protecta Bait Stations for Mouse - Rtu, One Case 12 Units - Protecta EVO Ambush Bait Stations (1 Case of 6 Stations) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.de/products/28150664-contrac-blox-4lbs](https://www.desertcart.de/products/28150664-contrac-blox-4lbs) --- *Product available on Desertcart Germany* *Store origin: DE* *Last updated: 2026-04-23*