Bell Laboratories Contrac Blox rodent bait 18 lb — bromadiolone single-feed, weather-resistant blocks

Contrac Blox 18 lb is a highly palatable single-feed rodent block bait formulated with bromadiolone to control mice and rats in indoor and protected outdoor sites.

Contrac Blox combines food-grade ingredients with a small amount of paraffin to create a weather-resistant bait that attracts rodents while holding up in damp or dry conditions. The formula is a single-feeding anticoagulant (bromadiolone) designed to be effective against commensal rodents; because it is a single-feed product, it requires responsible placement and secure tamper-resistant bait stations. Note: this product cannot be shipped to California.

How does Contrac Blox attract and hold up to weather?

The bait uses a palatable food matrix with paraffin to resist moisture and maintain integrity in varying conditions. That combination helps the blocks remain appealing to rodents longer than many loose baits, reducing wasted product in wet environments.

• Food-grade ingredients increase initial acceptance by mice and rats
• Paraffin coating improves rain and humidity resistance
• Solid block form reduces scattering compared with granules
• Designed for indoor and protected outdoor use in bait stations

What active ingredient is used and how is it applied?

Contrac Blox contains bromadiolone, a single-feed anticoagulant effective at low bait consumption. Apply the blocks inside tamper-resistant bait stations or secured placements where rodent activity is observed, and check stations routinely to maintain bait attractiveness.

• Active ingredient: bromadiolone (single-feeding anticoagulant)
• Recommended inspection interval: replace bait every 40–60 days as needed
• Use inside or in protected exterior locations within secure stations
• Avoid direct non-target access; follow label directions for placement

Is Contrac Blox safe around pets and people?

When used according to the label and always placed in tamper-resistant bait stations, Contrac is formulated to be less toxic to non-target animals than some other single-feed baits. Vitamin K1 is the established antidote for anticoagulant exposure; if accidental ingestion by a person or pet is suspected, contact emergency services or a veterinarian immediately.

• Formulated to reduce primary and secondary risks compared to some alternatives
• Always install in locked tamper-resistant bait stations away from children and pets
• Vitamin K1 is available as the antidote for anticoagulant poisoning
• Follow all label safety and disposal instructions strictly

How should I incorporate Contrac Blox into a rodent control plan?

Use Contrac Blox as one element of an integrated pest management approach: inspection, sanitation, exclusion, and targeted baiting. Monitor activity, replace bait every 40–60 days or sooner if eaten or contaminated, and combine with trapping and proofing for best long-term results.

• Inspect buildings for entry points and activity before baiting
• Place blocks in secure stations at intervals recommended on the label
• Replace bait every 40–60 days or when soiled/consumed
• Combine with sealing and sanitation to prevent reinfestation

Who is this for: Contrac Blox 18 lb is suited for pest management professionals, facility managers, and property owners who need a durable, single-feed rodenticide for treating mice and rats in warehouses, commercial buildings, agricultural support structures, and other indoor or protected outdoor areas. It is not for use where tamper-resistant stations cannot be employed, and it cannot be shipped to California. Always read and follow the product label for legal, safe, and effective use.