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

🌡️Durable rubber resists extreme temps

🛠️Self-adhesive backing for easy install

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VT12979

Duties & taxes included

In stock

Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

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

CUT FIT FLEX - Easily trim with scissors or a knife and bend to any shape for a flawless, custom fit.
STICK STAY POWER - Ultra-strong 3M adhesive ensures a rock-solid seal that won’t peel off, even in harsh weather.
VERSATILE HOME UPGRADE - Ideal for doors, windows, cabinets, speakers, and more — a smart fix for multiple needs.
COMFORT CLIMATE CONTROL - Blocks drafts, dust, noise, and cold to keep your home cozy and energy bills down.
SEAL EVERY GAP LIKE A PRO - 40 feet of flexible D-shaped rubber fits gaps from 2.5 to 5.5mm perfectly.

This 40-foot black D-shaped rubber weatherstrip from Fingwerk features a 0.3-inch width and 0.25-inch thickness, designed to seal gaps between 2.5 and 5.5mm. Its self-adhesive 3M backing allows quick, no-fuss installation, while the flexible, durable rubber withstands extreme temperatures without cracking or freezing. Perfect for doors, windows, and various household applications, it effectively blocks wind, dust, noise, and cold, enhancing home comfort and reducing energy costs.

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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