Commercial Door & Entrance Components: Perimeter Seals, Lite-Kit Gaskets, Astragal & Threshold Seals

Treat closing force as a numbered requirement before choosing the gasket. Ask the door manufacturer for the force the closer and latch can deliver at the last few degrees of swing, then select the compression-deflection class per ASTM D1056 against that budget rather than against the air-leakage argument alone. Take the remaining deflection from geometry: a shaped or hollow profile deflects at lower force than a solid strip of the same footprint. Size the seal to the widest gap, check it at the narrowest, and prototype on a real leaf and frame. [1]

Start with a premium closed-cell EPDM blend such as the RE-series: it holds recovery through daily cycling and carries UV and ozone headroom, with ozone data per ASTM D1149 and heat aging per ASTM D573 on the TDS. Move to SCE neoprene selected by density where the elevation is coastal or the seal is also an abuse target, and to closed-cell silicone sponge where the temperature range is wide. The 553 and 563 grades are solid EPDM sheet, so they belong only where the joint is designed for a dense strip; for low closing force on interior openings use the softer RE-series foam classes. [4]

A perimeter seal closes the gap between a leaf and a fixed frame stop at the head and jambs; an astragal seal closes the gap between two moving leaves at the meeting stile, with no frame behind it. That makes the astragal the harder duty: joint width changes with leaf warp, hinge wear, coordinator adjustment, and differential solar exposure, and the gasket is compressed and held for long periods. Select it on compression-set behaviour per ASTM D395 first, rather than letting it inherit the perimeter grade. [3]

H-O supplies converted parts to a listing held by the door, frame, or lite-kit manufacturer. On a rated opening the listing governs: it names the acceptable components, and an equivalent-looking gasket from a different family is not an equivalent component. NFPA 80 governs fire door assemblies and NFPA 105 smoke door assemblies; UL 1784 is the air-leakage test method a smoke listing may reference. H-O does not certify finished assemblies and does not confer a rating. State the rating path on the RFQ. [10]

It depends which of three jobs the gasket is doing. A bead gasket that seals and cushions the glass edge wants a compliant elastomer with recovery — solid silicone or a cellular silicone sponge behind the bead — and a channel liner wants the same. But where the lite is captured so the glass bears on the frame below, the part carries dead load and must not creep: a dense, non-cellular elastomer per ASTM C864 Option I, durometer per ASTM D2240. Inside a rated lite kit, the listing governs. [5]

As three separate qualifications, because they are three different surfaces. Galvannealed steel carries a crystalline zinc-iron layer with residual processing oils; powder coat is a cured, often low-surface-energy polymer with texture; anodized aluminum is a hard porous oxide whose sealing step changes it again. Specify the adhesive by chemistry and record the qualified substrate on the drawing rather than writing "PSA backing." Confirm peel per ASTM D3330 on a coupon of the production finish, and re-qualify when the finish changes. [9]

Usually compression set in the astragal seal. The pair passes its air test at handover, and eighteen months later the gasket is still in place, still measures close to nominal, and no longer returns to height. The meeting stile is the most-compressed, longest-held, most-cycled seal on the opening, so a foam chosen on price loses recovery there first. Symptoms are light at the meeting stile, whistle under pressure, and a coordinator that appears out of adjustment. Select on ASTM D395 compression set and qualify one grade per program. [3]

No. H-O is a converter: it die-cuts, slits, laminates, and kits roll, sheet, and bun stock to your drawing. H-O does not extrude sweep housings, thresholds, glazing beads, or any aluminum profile, does not mould rubber profiles in-house, does not supply wet sealants, and does not certify finished assemblies.

What H-O supplies is the elastomeric and foam component set that goes into those parts — perimeter gaskets, threshold isolation pads, sweep-backer foam, bedding strips, isolation and cushioning pads — with material traceability and lot-code TDS records.

Put a non-conductive isolation pad in the joint at design time and make it a numbered part on the assembly drawing. Where an aluminum member is fastened to a galvannealed or painted steel member, or an aluminum threshold sits on a steel sill plate, moisture plus a galvanic couple plus a fastener starts corrosion at the fastener and works outward, fastest on coastal elevations. Rubberized cork and dense EPDM both serve. Size the pad past the washer footprint and die-cut the fastener holes so it locates positively.

Ask for the actual number; on an access-controlled opening someone can tell you exactly. A mechanical room door opening twice a week and a main entrance running several thousand cycles a day are different applications with the same drawing. What ages out is recovery, so the governing property is compression set per ASTM D395, interacting with service temperature and with the ASTM D1056 class chosen for closing force. Put the cycle count and temperature range on the RFQ and the family narrows fast. [3]

They can look identical and are not interchangeable as specified items. A weatherstrip is a component selected on sealing performance, closing force, and durability. Smoke or air-leakage gasketing on a rated opening is part of a tested assembly: NFPA 105 covers smoke door assemblies and UL 1784 is the test method such a listing may reference, and the listing names the acceptable components.

Materials are commonly evaluated against these standards, which is a material statement, not an assembly rating. If the opening carries a rating, buy to the listing. [11]

Yes, that is the core service. Send the frame section, the leaf and lite-kit details, or a sample gasket, and H-O converts gaskets, pads, blocks, backers, and isolation parts matched to the profile geometry: corner-matched and mitred perimeter sets, kiss-cut-on-liner parts with pull-tabs for line-side application, laminated builds where one part needs two materials, and kitted bags by opening. Extruded bulb and kerf profiles come through a partner network while H-O converts the die-cut component set around them.

Usually, yes. Send the incumbent part drawings, the TDS, or physical samples, and engineering cross-references to families H-O converts, matching on the spec-relevant properties: cellular versus dense class, ASTM D1056 compression-deflection grade, durometer band per ASTM D2240, chemistry, adhesive system and qualified substrate, and compression-set behaviour. The result is verified against the vendor TDS before quoting, with re-qualification risk called out where a listed assembly or a project spec names a specific component.

Most of the families on this page are commonly stocked or sourced on demand by H-O, subject to availability: closed-cell EPDM foam (RE-series) and solid 553 and 563 EPDM sheet, SCE neoprene by density, dense EPDM and solid neoprene, solid silicone, closed-cell silicone sponge, PORON industrial urethane, H-O Mount double-coated XLPE, SAE pressed felt, cork and rubberized cork, and PVC foam. Specialty grades are usually sourced to the order; ask with the RFQ and engineering confirms current availability.

Every door and entrance component is made-to-order to your drawing, including samples. Typical prototype lead time is 5–10 business days after drawing review, depending on material availability, tooling, and inspection requirements; it can be as quick as 24 hours when the material is already in-house and no new tooling is needed. Standard production runs ship about 2 weeks after drawing approval. Expedited service is available. MOQ varies by material and part. Send the drawing and quantity for a specific lead-time commitment with your quote.