What size/width slot is required for pushing the plastic edge into?

Not sure what width you are asking about. If you are talking about the channel it goes into it is pretty much standard size which is a groove you press the flange into. The only width/gap you need to make sure of is the door to the frame which is about 5/8. Close your door and measure the spacing. I used this to replace the original of 37 years old and it fit like a charm. Very satisfied, looks good and will stop any air leaks. Hope this helps.

The groove you press the flange into should be installed first, because regular doors do not have it, right?

Actually our door had a groove and we just replaced the old stripping that the cats had shredded. Easy and worked great

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40 Feet WeatherStrip, Door Seal Strip, Self-Adhesive Backing, D Shape, Rubber Weather Strips for Door Frames, Large Gaps, Easily Cut to Size (Black)

40 Feet WeatherStrip, Door Seal Strip, Self-Adhesive Backing, D Shape, Rubber Weather Strips for Door Frames, Large Gaps, Easily Cut to Size (Black)

Product ID: 745685682

Details

Brand
Fingwerk
Color
Black D
Item Thickness
0.23 Inches
Material
Rubber
Product Dimensions
12.19L x 0.01W

📏40ft length for full coverage

❄️Flexible rubber resists extreme temps

🛠️Self-adhesive backing for easy install

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Description

🚪 Seal the deal on comfort and style—don’t let drafts crash your vibe!

STICK STAY POWER - Super-strong adhesive backing ensures a hassle-free, no-fall installation that lasts through seasons.
BEYOND DOORS WINDOWS - Versatile enough for furniture, cabinets, speakers, and more—upgrade your entire space’s insulation game.
CUT FIT AND CUSTOMIZE - Easily trim to your exact door or window size with scissors—perfect fit, zero fuss.
BUILT TO BRAVE THE ELEMENTS - Flexible, crack-resistant rubber withstands freezing cold and scorching heat without losing shape or function.
SEAL EVERY GAP SAVE EVERY DEGREE - 40 feet of premium D-shaped rubber seals gaps from 2.5 to 5.5 mm, locking in comfort and cutting energy waste.

The Fingwerk 40 Feet WeatherStrip is a durable, self-adhesive D-shaped rubber seal designed to fit gaps between 2.5 and 5.5 mm. Its flexible material resists cracking in extreme temperatures, providing effective insulation against wind, dust, noise, and cold. Easy to cut and install, it’s ideal for doors, windows, and various household applications, ensuring energy efficiency and enhanced comfort.

Specifications

ASIN	B09TRBV7G8
Brand Name	Fingwerk
Color	Black D
Customer Reviews	4.2 4.2 out of 5 stars (1,146)
Item Dimensions L x W	12.19L x 0.01W m
Item Thickness	0.23 Inches
Manufacturer	Fingwerk
Material Type	Rubber
Number of Items	1
Recommended Uses For Product	Windows, Doors
Unit Count	1 Count

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$59.54

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