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Pemko 285 Series Standard Perimeter Gasketing with Neoprene Insert - 84"; Length Aluminum Door Weatherstripping
Professional Door Sealing Solution for Commercial Applications
The Pemko 285 Series Standard Perimeter Gasket delivers reliable sealing performance for wood, metal, and glass doors with its durable aluminum base and flexible neoprene insert. This 84"; length gasket features a 1"; profile height and 82/125"; base dimension, designed to seal gaps up to the depth of its seal with screw-applied mounting system for secure installation on side of frame applications.
Professional Features & Benefits
- Dimensional Specifications: 84"; length with 1"; profile height and 82/125"; base dimension for precise door frame sealing applications.
- Durable Construction: Aluminum base material with neoprene insert delivers professional-grade performance for demanding commercial applications.
- Temperature Performance: Flexible operation at both high and low temperatures ensures consistent sealing performance across varying environmental conditions.
- Chemical Resistance: Resists deterioration from oily substances for long-term durability in commercial environments.
- Compressible Design: Slightly compressible neoprene insert provides effective sealing while accommodating door movement and frame variations.
- Universal Door Compatibility: Suitable for wood, metal, and glass doors providing versatile installation options for various door types.
- Secure Mounting: PHSMS #6 x 5/8"; fasteners provide reliable screw-applied installation on side of frame mounting locations.
Technical Specifications
- Department: Door Hardware
- Product Category: Door Trim and Accessories
- Product Dimension: H: 82/125";
- Product Group: Door Trim and Accessories
- Product Length: 84";
- Product Model: 285
- Product Subgroup: Gaskets
- Product Substrate: Aluminum
- Product Type: Weatherstripping
- Subcategory: Astragals, Gaskets and Weatherstripping
Professional Applications
- Commercial Office Buildings
- Educational Facilities
- Healthcare Institutions
- Retail Establishments
- Industrial and Warehouse Facilities
- Multi-Tenant Residential Properties
- Government and Municipal Buildings
Why Choose Pemko Quality?
Pemko 285 Series gaskets deliver professional-grade sealing performance with aluminum construction and temperature-resistant neoprene inserts designed for demanding commercial applications. The chemical-resistant formulation and compressible design ensure reliable long-term performance where consistent door sealing is essential.
Manufacturer Resources
Pemko/Markar Products Full Line Catalog
Product Specs
- Product Group:
- Door Trim and Accessories
- Product Subgroup:
- Gaskets
- Subcategory:
- Astragals, Gaskets and Weatherstripping
- Product Model:
- 285
- Product Length:
- 84"
- Product Dimension:
- H: 82/125"
- Product Substrate:
- Aluminum
- Product Category:
- Door Trim and Accessories
- Department:
- Door Hardware
- Product Type:
- Weatherstripping
Pemko 285CR3684 – Frequently Asked Questions
1) Will the Pemko 285 perimeter gasket fit a standard 84 inch commercial door frame?
The 285 Series gasket comes in an 84 inch length, which covers the full height of a standard 7 foot opening on one jamb. A typical single opening needs two jamb pieces plus a head piece, so plan on cutting one 84 inch stick down for the head or ordering additional lengths. The aluminum retainer cuts cleanly with a hacksaw or miter saw.
2) Does Pemko 285 weatherstripping work on wood doors, or only hollow metal?
Wood, metal, and glass doors all work. The 285 mounts to the frame rather than the door leaf, so the door material only matters for the surface the neoprene bulb seals against. Fastening is screw-applied to the side of the frame with PHSMS #6 x 5/8 inch screws, which means the jamb has to take a screw, an aluminum or hollow metal frame needs the right pilot and wood frames take it directly.
3) How much gap will the Pemko 285 neoprene gasket actually close on a door?
The 285 has a 1 inch profile height and a 82/125 inch base, and the neoprene insert is slightly compressible, so it seals gaps up to the depth of its seal. It is a compression seal, not a sweep, so it works on the strike jamb, hinge jamb, and head where the door closes against the stop. It does not address the gap under the door, that needs a door bottom or sweep.
4) What is the closest equivalent to the Pemko 285 perimeter gasket in an 84 inch length with a neoprene insert?
The Hager 864S is the nearest match. It is an 84 inch adjustable jamb weatherstrip in clear anodized aluminum with a neoprene insert, so it lines up with the Pemko 285 on length, on the clear anodized aluminum finish, and on the sealing material. The difference is in the retainer: the Hager 864S is an adjustable jamb weatherstrip, meaning the seal position can be tuned to the gap after mounting, while the Pemko 285 is a fixed standard perimeter gasket with a 1 inch profile height and an 82/125 inch base that is screw applied to the side of the frame. On an opening where the frame is true and the gap is consistent, the fixed 285 profile is the simpler part; where the frame has drifted and the gap varies top to bottom, the adjustable Hager 864S gives you a way to chase it.
5) The Pemko 285 gasket is 84 inches, but the head of my frame only needs about 4 feet. What should I use instead?
The Hager 862S is a 48 inch weatherstrip with a neoprene insert for smoke and draft control, which covers a head run at roughly half the length of the 84 inch Pemko 285. Both carry a neoprene insert, so the sealing material behaves the same way against the door face. Buyers typically run the 84 inch Pemko 285 on the two jambs and pick up a shorter section for the head, rather than cutting a full length down and having the offcut go to waste. If the opening is a pair of doors, count two jamb runs plus the head before ordering.
6) Should I use screw-on aluminum weatherstrip or a press-on adhesive seal on my doors?
Screw-applied aluminum like the Pemko 285 is the choice where the door gets heavy traffic or the frame sees cleaning chemicals, because the retainer is mechanically fastened and will not creep off the jamb. A press-on seal such as the Hager 726S smoke seal installs faster with no drilling and no screw holes in the frame, which suits occupied retrofits and tenant spaces where you cannot mark up the jamb. If the frame is painted and you want it to stay that way, press-on wins. For a door that slams a hundred times a day, use the screw-applied retainer.
7) Is neoprene weatherstripping OK where there is oil, grease, or big temperature swings?
Neoprene is what you want in both cases. The 285 insert stays flexible at high and low temperatures and resists deterioration from oily substances, so it holds up in unconditioned warehouse and mechanical room openings and on shop or loading dock doors where a foam or vinyl bulb would harden or break down. The aluminum retainer is not affected by either condition.
8) Can I use brush weatherstrip instead of a neoprene bulb seal on a commercial door?
They do different jobs. A neoprene bulb like the 285 compresses against the stop and gives a positive seal against air and light, which is what you want on an exterior or conditioned opening. Nylon brush weatherstrip, such as the Cal-Royal BW-302 with its extruded aluminum retainer, sweeps rather than compresses, so it tolerates sliding contact and out-of-plane movement but does not seal as tightly. Use brush where the door surface rubs the seal or the gap varies, and neoprene where you are chasing drafts.
9) I need weatherstrip for a 48 inch head on a double door, is the 84 inch Pemko 285 the right buy?
You can cut an 84 inch stick of 285 down to 48 inches, the aluminum retainer trims to size. If you would rather not waste the material, the Hager 862S is a 48 inch weatherstrip with a neoprene insert, which is closer to a head-only length. For a pair of doors also account for the meeting stile, perimeter gasket seals the jambs and head but the gap between the two leaves needs an astragal.
10) Is a brush weatherstrip like the Cal-Royal BW-302 a substitute for the Pemko 285 neoprene gasket?
They are different sealing methods and are not interchangeable on the same opening. The Cal-Royal BW-302 is a nylon brush weatherstrip carried in an extruded aluminum seal retainer, so the seal is bristle against the door face; it sweeps rather than compresses, and it keeps sealing where the door face is irregular or the gap moves. The Pemko 285 uses a slightly compressible neoprene insert in an aluminum base that squeezes against the door when it closes, resists deterioration from oily substances, and stays flexible at both high and low temperatures. If the specification on the drawing calls out a compression gasket, a brush seal does not meet it, and the reverse is true as well. Confirm which the job was specified for before swapping.
11) What is a simpler alternative to the screw applied Pemko 285 gasket when I cannot drill the frame?
The Hager 726S is a smoke seal weatherstrip with press-on installation in a charcoal finish, which mounts without the fasteners the Pemko 285 requires. The Pemko 285 is screw applied to the side of the frame with PHSMS #6 x 5/8 inch fasteners into an aluminum base, so it needs a frame you can drill and it leaves holes behind. The press-on Hager 726S is the one to reach for on a rented space, a historic frame, or a retrofit where the existing frame condition rules out drilling. Note the appearance difference as well: the Hager 726S is charcoal, while the Pemko 285 is clear anodized aluminum, so on a fleet of doors that already carry the aluminum look the two will not match side by side.
12) Will clear anodized aluminum weatherstrip match the frames I already have?
The 285 is offered in clear anodized aluminum, which is the standard silver mill-look finish and reads neutral against aluminum storefront, painted hollow metal, and most factory frame finishes. If you are standardizing a building, note that the Hager 864S jamb weatherstrip carries the same clear anodized aluminum finish, so mixing the two across openings will not show a color break.
13) Do I need to buy screws separately for Pemko 285 weatherstripping?
Fastening is PHSMS #6 x 5/8 inch pan head sheet metal screws into the side of the frame. Beyond fasteners, the only tools the job needs are a saw to cut the aluminum retainer to length and a drill for pilot holes in hollow metal. Plan the quantity by opening: two jambs plus a head per single door, and remember the 285 seals the perimeter only, the door bottom is a separate part.
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Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Pemko 285CR3684 come with a warranty?
Absolutely. The Pemko 285CR3684 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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