Introduction
The Terro T521 Super Fly Roll Magnet Fly Trap is designed for effective control of flies and other flying insects in various environments such as stables, garages, and other large facilities. This product utilizes a 4-inch wide sticky paper, extending over 19 feet in length, featuring specially designed 3D patterns to attract insects. The super-sticky surface ensures that once flies land, they remain trapped.
This manual provides detailed instructions for the proper setup, operation, and maintenance of your Terro T521 Super Fly Roll to ensure optimal performance and safety.
Product Overview
The Terro T521 Super Fly Roll is a non-toxic, pesticide-free solution for fly control. Its key features include:
- 4-inch Wide Sticky Paper: Provides a large surface area for trapping insects.
- Over 19 Feet Long: Ensures extended use and long-lasting fly control.
- 3D Imagery: Specially designed patterns on the paper attract flying insects.
- Super-Sticky Surface: Effectively traps and holds insects.
- Easy to Use: Simple to hang, unroll, and trim as needed.


Setup Instructions
- Unpack the Roll: Carefully tear away the outer packaging. Ensure the plastic zip-tie handle remains attached to the roll. Do not remove this handle.
- Select Placement: Choose a location where flies are prevalent, such as stables, garages, or other large areas. Ensure the location is accessible for hanging and future maintenance.
- Hang the Handle: Use the attached plastic zip-tie handle to hang the roll on a nail, hook, or other suitable fixture.
- Unroll the Trap: While holding the zip-tie handle firmly, gently pull the desired length of sticky paper from the roll. The leading end of the paper can hang freely or be secured to another nail or hook to keep it taut.
- Positioning: For optimal results, angle the sticky side of the fly paper slightly toward the ground. This can enhance its effectiveness in attracting and trapping flies.

Operating Instructions
Once set up, the Terro T521 Super Fly Roll operates continuously to attract and trap flies. The integrated 3D designs on the sticky paper are specifically engineered to lure flying insects. Flies are attracted to these patterns and subsequently become stuck on the highly adhesive surface.
No further action is required for the trap to function. Simply ensure it is placed in an area with fly activity.
Maintenance
Regular maintenance ensures the continued effectiveness of your fly trap:
- Monitor the Trap: Periodically check the exposed section of the fly roll.
- Replace Full Sections: When a section of the sticky paper becomes full of trapped insects, carefully trim it off using scissors.
- Unroll New Section: After removing a full section, gently pull out a fresh length of sticky paper from the roll. Ensure the new section is properly exposed and positioned.
- Disposal: Dispose of used sticky paper sections responsibly according to local waste disposal guidelines.
Caution: The sticky surface is very adhesive. Avoid direct contact with skin or clothing. If contact occurs, use vegetable oil to help remove the adhesive.
Troubleshooting
If you observe reduced effectiveness with your Terro T521 Super Fly Roll, consider the following:
- Insufficient Fly Activity: Ensure the trap is placed in an area with active fly presence. Relocate if necessary.
- Full or Dry Surface: Check if the exposed sticky paper is completely covered with insects or if the adhesive has dried out. Trim off the old section and unroll a fresh length of paper.
- Improper Placement: Verify that the sticky side of the paper is angled correctly and not obstructed. Ensure it is not exposed to excessive dust or debris that could reduce stickiness.
- Environmental Factors: Extreme temperatures or high humidity might affect the adhesive's longevity. Consider moving the trap to a more suitable environment if possible.
Specifications
| Feature | Detail |
|---|---|
| Model Number | T521 |
| Brand | Terro |
| Length | More than 19 feet |
| Width | Approximately 4 inches |
| Material | Paper with adhesive |
| Target Species | Flies and other flying insects |
| Intended Use | Barns, stables, garages, restaurants, and other indoor or outdoor areas with fly presence |
| Color | White |
| Item Weight | 0.01 ounces |
| Product Dimensions | 4 x 242 x 2.75 inches (packaging) |

Warranty and Support
Specific warranty information for the Terro T521 Super Fly Roll Magnet Fly Trap is not provided in the product details. For any warranty-related inquiries or product support, please refer to the manufacturer's official website or contact their customer service directly.
Manufacturer: Woodstream
For further assistance, visit the Terro Store on Amazon or the official Terro website.



