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Black Markers For Fly-Through

Black Markers For Fly-Through

Regular price $18.99 USD
Regular price Sale price $18.99 USD
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Shipping calculated at checkout.

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Fly-Through is when birds can see a habitat or sky that really does exist on the other side but do not realize the glass is a solid barrier preventing them from reaching it. A clear glass railing or a glass walkway are perfect examples. If your glass has Fly-through, you will need our Black deterrent Markers, and they can be placed on either side of the glass. If you are still unsure, please contact us at for assistance.

Each order comes with a complete application kit, including:

  • Roll(s) of Feather Friendly DIY marker deterrent 
  • Paper Measuring deterrents (2) to be used as guides during installation
  • Plastic squeegee (1) for pressing markers to glass during installation
  • Installation Instruction sheet 


Marker deterrent coverage: Each 100 ft. roll is enough material to treat 16 square feet (approx. 1.5 square meters) of glass, or equivalent to a 4' x 4' transparent panel or railing.  For treating areas of glass 150 square feet or more, we recommend Feather Friendly Large Scale/Commercial Solution.

Application Temperature: Markers must be applied at a MINIMUM TEMPERATURE of 10°C or 50°F. 

Storage and Handling: Store at room temperature. Avoid humidity and extreme cold.  Most effective adhesion if applied within 2 months of purchase.

Durability and Longevity: 8+ years if installed correctly. Please note that if installing on glass railings, do not pile snow against the side of the glass with markers for extended periods. This may cause the submerged markers to drift over time.

Installation VideoDIY Installation Video

Will Not Damage Glass Surfaces or Exterior Glass Coatings such as Solar Reflective, Low-E, or other types of glass treatments.

Can Be Applied to Either Side of the Glass

Shipping Options:

For orders of 6 rolls or less, you may select to ship via Canada Post surface mailer envelope.  THIS SHIPPING OPTION DOES NOT PROVIDE TRACKING INFORMATION.  Delivery time estimates for this option are 5-10 business days within Canada, 10-20 business days to the US.   

For orders outside the US and Canada: 

International orders will default to FedEx International Economy if ordered from this website.  If you wish to obtain a quote for additional international shipping options, please complete and submit this form.


Collisions with residential glass surfaces account for a significant number of bird deaths annually - especially during migration seasons.  In order for birds to 'see the glass' and not collide, subtle visible markers must be applied to transparent glass surfaces in outdoor problem areas. Feather Friendly® ‘Do-It-Yourself’ marker deterrent allows you to apply the same solution on your glass panel fencing that has proven to be successful in thousands of square feet of commercial installations. 

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