Never Rust Plastic Dog door, Large Doggy Door, Doggie Door for Easy Install in Interior and Exterior Doors or Wall, Double Magnetic Flaps, Closing Panel, Pet Door for Pet Up to 100lb (Large) Review
By Dr. Lena Ortiz · Canine wellness writer · Published 2026-05-19 · Updated 2026-06-24
The PETCOMING Never Rust dog door is a large plastic door with double magnetic flaps built for easy install in interior or exterior doors, and its 4.2 star average across 286 reviews suggests it's a dependable budget-friendly option.
Owners who want an affordable plastic door for a large dog and don't need the extra durability of an all-aluminum frame.
Skip if
You want a door that fits a wall installation, since this is built for doors between 1.02 and 2.36 inches thick, not walls.
Breed size Large
Our scorecard
4.2/5overall
Owner rating4.2/5
4.2 average across 286 owner ratings
Popularity1.7/5
286 owner reviews, fewer than most models here
The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other dog and cat food, health, gear and grooming we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.
Overview
["This is a large dog door from PETCOMING, sold under the Never Rust name and built with a plastic frame instead of aluminum. It uses double magnetic flaps and a closing panel, and it's marketed as suitable for interior and exterior doors as well as walls, with easy installation.", "It's rated for pets up to 100 pounds and fits doors between about 1.02 and 2.36 inches thick. The box includes installation instructions, a pet warning sticker, replacement flaps and the slide-in closing panel.", "At $59.99, it's priced well below most all-aluminum large dog doors, and its 4.2 star rating across 286 reviews with about 100 units bought last month points to solid, if unspectacular, satisfaction for a plastic door at this price."]
Pros
Lower price than comparable aluminum large dog doors
Double magnetic flaps for a tighter seal than a single flap
Includes a slide-in closing panel to block access when needed
Rated for dogs up to 100 pounds
Manufacturer backs the line with a warranty on the doors
Cons
Plastic frame is less durable long-term than an aluminum alternative
Only fits doors between 1.02 and 2.36 inches thick
4.2 star average trails the higher-rated aluminum doors in this category
Specifications
Breed size
Large
Performance notes
The plastic frame keeps the cost down compared to aluminum doors of similar size, while the double magnetic flaps and slide-in closing panel are meant to offset some of the durability gap by improving the seal and giving owners a way to shut off access without extra hardware.
What buyers say
A 4.2 star average across 286 reviews with about 100 units bought in the past month suggests steady, moderately positive feedback typical of a budget plastic door rather than a premium aluminum model.
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