Installation Instructions
Please read before installation.
Number One Defender™ is a precision-fit splash guard designed for elongated toilet seats only. Proper installation is required for correct performance and long-term adhesion. Installation takes approximately 5–10 minutes and requires no special tools.
Compatibility & Requirements
✅Seat & Lid Requirements
Number One Defender™ is compatible with:
✅ Elongated toilet seats
✅ Standard residential hinge mounting (non-commercial)
✅ Seats that can be lifted to a vertical position
Not compatible with:
❌ Round toilet seats
❌ Integrated or non-removable seats
❌ Commercial or public restroom fixtures
🛠 Installation Requirements
Before installing, ensure the following conditions are met:
- Toilet seat and rim are clean and completely dry
- Installation is performed at room temperature
- Panels are fully aligned before adhesive contact
After installation, allow the adhesive to set fully before use.
🚫 Bidets & Add-Ons
Number One Defender™ is not compatible with the following:
- Bidet attachments
- Built-in bidet seats
- Add-on seat risers or spacers
Use with incompatible accessories may affect performance and void eligibility for returns.
🪑 Seat Materials & Surfaces
Adhesive performance depends on seat material and surface finish.
Compatible surfaces:
- Wood seats
- Finished plastic seats
- Sealed or glazed ceramic surfaces
Not recommended for:
- Textured, rubberized, or fabric-coated seats
- Porous, unfinished, or damaged surfaces
🧩 Toilet Geometry & Fit
Number One Defender™ is designed to follow the exterior contour of elongated toilet bowls.
Performance depends on seat geometry and sidewall clearance.
- Designed for standard elongated bowl profiles
- Requires sufficient side clearance between seat and bowl
- May not perform as intended on bowls with extreme tapering or unusual contours
Installation Steps
- Lift the toilet seat to the vertical position.
- Using the alignment tabs, test-fit the rails on both sides of the seat.
- Bottom of each rail must sit 2.5 in (64 mm) above the top of the toilet bowl rim.
- Note the entire contact area where each rail will attach to the seat.
- Remove rails and lightly scuff the marked contact areas using the included scuffing pad.
- Thoroughly clean all mounting surfaces with the included isopropyl alcohol wipe.
- Allow surfaces to fully dry (60 seconds to 3 minutes).
- With the seat raised, place the 2.5 in spacer on the bowl rim near the hinges.
- Attach each rail to the side of the seat, ensuring the bottom of the rail aligns with the spacer.
- Apply uniform pressure to each rail for approximately 5 minutes.
- Lower the seat and apply even pressure to lock the rails in place.
- Wait 1 hour before inserting panels.
Full adhesive bond achieved after 72 hours.
Important: Once adhesive makes contact, do not reposition the rails.
Contact our support team before attempting removal or reinstallation.
Questions or issues?
Contact our support team before attempting removal or reinstallation.
You can also return to the product page for specifications and compatibility details.