Harford Door Gaskets — 3- and 4-Sided Options

Harford Magnetic Walk-In Door Gaskets – 3- & 4-Sided Options

This listing includes multiple Harford magnetic walk-in door gasket options for compatible commercial walk-in cooler and freezer doors. Available selections include left-hand and right-hand 3-sided gaskets as well as 4-sided gasket configurations in several door sizes.

Each gasket option has its own manufacturer part number, dimensions, handing, and side configuration. These variants are not automatically interchangeable. Select the exact option required for the original walk-in door and confirm the manufacturer part number, dimensions, gasket profile, handing, and number of sides before ordering.

Available Harford Gasket Options

• LH770134 – 35-1/2" x 77" – Left Hand – 3 Sided
• RH770134 – 35-1/2" x 77" – Right Hand – 3 Sided
• D3476 – 36" x 79-1/2" – 4 Sided
• LH770136 – 37-5/8" x 77" – Left Hand – 3 Sided
• RH770137 – 37-5/8" x 77" – Right Hand – 3 Sided
• 500000067 – 4-Sided Door Gasket
• 2261910 – 38" x 79" – Left Hand
• 2261910R – 38" x 79" – Right Hand
• 770138 – 49-3/8" x 83" – 3 Sided

Use the individual variant selection to confirm the exact gasket being purchased. The manufacturer part number and physical configuration should always be matched to the original door gasket before ordering.

What a Harford Walk-In Door Gasket Does

A walk-in cooler or freezer door gasket creates a flexible sealing surface between the door and frame. When the door closes, the magnetic gasket helps maintain contact around the opening to reduce unwanted air movement between the refrigerated space and the surrounding environment.

A properly fitted gasket helps reduce warm, humid air infiltration and supports stable walk-in operating conditions. Poor gasket contact can contribute to condensation, frost, ice formation, longer refrigeration-system run times, and inconsistent box temperatures.

3-Sided vs. 4-Sided Walk-In Door Gaskets

The number of gasket sides is an important part of replacement identification.

3-sided gaskets are designed for walk-in doors where the sealing configuration uses gasket material on three sides of the door. These versions may also be specifically handed for a left-hand or right-hand door.

4-sided gaskets form a complete rectangular gasket around all four sides of the door. A four-sided gasket should not be substituted for a three-sided gasket simply because the overall door dimensions appear similar.

Left-Hand and Right-Hand Gasket Options

Several Harford gasket options on this page are available in separate LH and RH configurations. Handing is part of the physical gasket design and should be matched to the original door arrangement.

Do not assume a left-hand and right-hand gasket are interchangeable. Match the manufacturer part number and original gasket orientation before ordering.

Magnetic Door-Sealing Design

The magnetic sealing section helps draw the gasket toward the walk-in door frame when the door closes. The flexible gasket body compresses against the mating surface to help close gaps around the perimeter.

For proper operation, the gasket must be correctly positioned in the mounting channel and the door itself must be properly aligned.

Common Signs a Walk-In Door Gasket May Need Replacement

• Gasket is torn, cracked, split, or punctured
• Magnetic section no longer contacts the frame consistently
• Gasket has become hard or permanently compressed
• Visible gaps remain when the door is closed
• Gasket pulls away from its retaining channel
• Moisture develops around the door opening
• Frost or ice forms around the door perimeter
• Door becomes difficult to seal completely
• Walk-in temperature recovery becomes slower
• Gasket has been damaged during door or hardware service

These symptoms do not automatically mean the gasket is the only problem. Door alignment, hinges, closers, latches, sweep condition, frame condition, and mounting hardware can also affect gasket contact.

Why Walk-In Door Gasket Condition Matters

Commercial walk-in cooler and freezer doors can be opened many times throughout the day. Each closing cycle compresses the gasket against the frame, making the gasket a normal wear component.

As gasket material ages, it can harden, flatten, tear, distort, or lose consistent contact with the frame. Restoring the correct gasket configuration helps maintain the intended door-to-frame seal when the rest of the door assembly is properly adjusted.

How to Identify the Correct Harford Gasket

Do not select a replacement walk-in gasket based only on appearance or approximate door size.

Before ordering, compare:

• Harford manufacturer part number
• Overall gasket width and height
• 3-sided or 4-sided configuration
• Left-hand or right-hand configuration when applicable
• Gasket cross-section and profile
• Mounting / retaining profile
• Walk-in door dimensions
• Door orientation and hardware arrangement
• Original gasket corner construction

Technician Installation Tips

Before installing a replacement gasket, inspect and clean the gasket mounting channel. Remove dirt, grease, food residue, deteriorated gasket material, and other debris that could prevent the gasket from seating correctly.

Install the gasket according to the original door configuration without unnecessarily stretching or twisting the material.

After installation, close the door and inspect the entire sealing perimeter. The gasket should make consistent contact with the door frame without large gaps, twisting, or sections pulling out of the retainer.

If the new gasket does not seal evenly, inspect the hinges, latch, closer, door alignment, frame, and gasket mounting channel before assuming the replacement gasket is incorrect.

Before You Order

This is a multi-variant Harford gasket listing. The available sizes, handing configurations, and number of gasket sides vary by selection.

Before purchasing, confirm:

• Exact Harford manufacturer part number
• Selected gasket dimensions
• 3-sided or 4-sided configuration
• Left-hand or right-hand configuration when applicable
• Original gasket profile
• Mounting style
• Walk-in door width and height
• Original gasket shape and configuration

If fitment is uncertain, compare the original manufacturer part number, measurements, profile, number of sides, and door handing before ordering.

Frequently Asked Questions

Are all of the Harford gaskets on this page the same size?
No. This listing contains multiple sizes and configurations. Select the exact variant required and compare its dimensions with the gasket being replaced.

Are all of these Harford gaskets 3-sided?
No. This page includes both 3-sided and 4-sided gasket options. Verify the selected variant before ordering.

What is the difference between an LH and RH Harford gasket?
LH and RH identify left-hand and right-hand configurations. The correct handing should be matched to the original walk-in door gasket and door arrangement.

Can I replace a 3-sided gasket with a 4-sided gasket?
Not unless the original door design specifically allows that configuration. Match the number of sides used by the original gasket.

Can I choose a replacement gasket based only on dimensions?
No. Dimensions should be checked together with the manufacturer part number, number of sides, handing, gasket profile, and mounting configuration.

Can a damaged walk-in gasket cause frost or ice around the door?
Yes. Gaps in the gasket seal can allow warm, humid air to enter the refrigerated space and contribute to condensation, frost, or ice formation.

Why does my new gasket still have a gap?
Possible causes include door misalignment, worn hinges, latch or closer problems, an incorrect gasket profile, improper installation, or damage to the gasket retainer or frame.

How do I confirm which Harford gasket variant I need?
Match the manufacturer part number whenever possible and verify the dimensions, 3- or 4-sided configuration, handing, mounting profile, and original door gasket before ordering.

Harford Walk-In Cooler & Freezer Door Gaskets

Harford door gaskets are used in commercial walk-in refrigeration applications where proper door sealing is essential. Correct manufacturer part-number, size, handing, and gasket-profile identification helps reduce ordering errors and supports proper walk-in cooler and freezer door operation.