The Ingenious Magnet Seal That Changes Everything

Dura Flex uses rare-earth point magnets spaced along the entire periphery of the flap — not just a few center magnets like conventional pet doors. These magnets seat against floating mating seals in the frame mounted behind industrial felt, creating a neoprene-to-felt closure that's smooth, quiet, and 100% airtight. When wind pushes against the flap, it must overcome all magnets simultaneously — requiring tremendous force. But when your dog approaches nose-first, they push against only one pair of magnets at a time, separating them sequentially as they move through the opening. This is why Dura Flex can withstand 50 mph winds while still being easy for any dog to open.

Both are premium aluminum pet doors with rare-earth magnetic seals, but they use different flap designs. The Armor Flex uses a segmented rigid flap — interlocking ABS composite segments that provide a very strong, structured seal. The Dura Flex uses a wide-flange vinyl flap with point magnets along the full perimeter — a design optimized specifically for maximum airtightness and draft elimination. The Dura Flex is the better choice if your primary concern is airtight sealing and energy efficiency; the Armor Flex is the better choice if structural rigidity and heavy-duty impact resistance are your priorities.

The Dura Flex patio frame uses 14-gauge aluminum with frame members that are 75% thicker than most competing patio door frames — resulting in a frame five times stronger. The glass is dual-pane, tempered, and certified Low-E for the best energy efficiency. Each door comes with three security locks: a universal lock that mates to most patio doors, an additional foot lock for extra security, and a heavy-duty security lock-out panel for when you're away. No cutting required — it slides directly into your existing patio door track.

Measure the interior height of your sliding glass door track from bottom to top. Regular height fits frames 75"–80¼". Tall height fits frames 92¾"–96". If your measurement falls outside these ranges, call us at 1-800-255-1279 before ordering.

Yes. Every DuraFlex wall mount model includes a telescoping aluminum tunnel that installs in walls up to 7⅜" thick. For unusually thick walls, additional tunnel extensions can be added to accommodate virtually any wall depth.

Measure your dog's shoulder width and back height while standing. The flap should be at least 1–2 inches wider than your dog's shoulders and 1–2 inches taller than their back. Medium (8¼" × 17¼") fits most dogs up to 50 lbs for door/wall (30 lbs for patio); Large (10½" × 21¼") fits most dogs up to 90 lbs; Extra Large (12½" × 25") fits most dogs up to 130 lbs. When in doubt, size up — a slightly larger opening is always better than one your dog has to squeeze through.