Zero International 8780N Neoprene Replacement Gasket

No fasteners. The 8780N comes with 3M self-adhesive tape already applied, so it presses onto a clean frame stop or into the retainer it is replacing. That makes it a fast swap on occupied openings where you cannot drill the frame.

Just the seal. The 8780N is replacement sponge neoprene gasketing, meant to renew the sealing element on an existing Zero perimeter seal rather than replace the housing. If your aluminum retainer is bent or the frame prep is gone, you need a complete perimeter seal, not this.

No. The 8780N is closed cell sponge neoprene, flame resistant and self extinguishing, and it is fire rated UL10c with smoke and draft control. The NGP 155V is a vinyl perimeter seal in a mill aluminum frame for commercial door weatherstripping - a different sealing material in a rigid housing. Vinyl and neoprene behave differently against compression set and heat, so they are not interchangeable where the neoprene is being used for a rated opening.

The Zero 8780N is a closed cell sponge neoprene gasketing with 3M self-adhesive tape, sold in black in an 8 foot length. The nearest neoprene equivalent in another line is the NGP 108NA Neoprene Sponge Seal, which carries its neoprene sponge in an anodized aluminum frame and is rated for a temperature range of -20 F to 200 F. The difference is form: the 8780N is an adhesive-backed neoprene strip applied directly to the stop, while the 108NA mounts as a framed seal.

The 8780N is a compression style sponge neoprene seal, so it depends on the door closing consistently against the stop. Where the door does not land evenly, the NGP 159MA magnetic seal in anodized aluminum, offered in an 84 inch length, pulls the door leaf to the seal magnetically rather than relying on compression alone. Zero perimeter seals are adjustable sealing systems intended for sound control, so where the frame can be shimmed or the stop adjusted the 8780N remains the direct neoprene answer.

The 8780N is a replacement gasket equipped with 3M self-adhesive tape, so it bonds directly to a clean stop with no housing. If the job calls for a housed assembly, the Cal-Royal PG-601 is an aluminum channel perimeter gasketing with a vinyl insert, and the NGP 155V carries a vinyl seal in a mill aluminum frame. Both fasten as a channel to the frame; the 8780N is the strip itself and is the part you buy when the housing is already on the opening and only the seal needs replacing.

Closed cell sponge neoprene, like the 8780N, compresses soft and recovers, which is why Zero calls out sound control as one of its uses, and it is the material you want where a smoke and draft rating is in play. Vinyl is the other common insert: the NGP 155V vinyl perimeter seal uses a mill aluminum frame with a vinyl bulb. If you want a brush instead for a door that sweeps debris, the NGP 602A nylon brush seal is the alternative. Magnetic seals such as the NGP 159MA rely on the door being steel to pull tight.

The NGP 108NA is a neoprene sponge seal supplied with an anodized aluminum frame, rated for a temperature range of -20 F to 200 F. That is the one to order when you are building a new perimeter seal rather than re-gasketing an existing Zero retainer. Cal-Royal's PG-601 is an aluminum channel perimeter gasketing with a vinyl insert if you would rather have vinyl in the channel.

They solve different problems. The NGP 602A is a nylon brush seal in an anodized aluminum housing, which sweeps against the door and tolerates constant traffic and sliding contact. The Zero 8780N is closed cell sponge neoprene with smoke and draft control and a UL10c fire rating, which needs to compress to close the gap. For dust and light air movement a brush seal is a common choice; for smoke and draft control at the perimeter, the neoprene is the one doing that work.

The 8780N is commercial door hardware gasketing in black, supplied in 8 foot lengths and cut to the opening, non-staining and self-extinguishing, with UL10c fire rating and smoke and draft control. The framed alternatives change the look and the mounting: the NGP 108NA and NGP 602A use anodized aluminum, the NGP 155V uses mill aluminum, and the Cal-Royal PG-601 is an aluminum channel. If the openings across the facility already carry aluminum housings, the 8780N standardizes the seal element itself across all of them.

The 8780N neoprene is non-staining, so it will not bleed into a painted hollow metal frame or mark anodized aluminum where it sits compressed for years. That matters on lobby and corridor openings where the frame finish is visible.

It is a commercial product. Zero perimeter gasketing is specified for commercial door hardware, and the 8780N in particular is the type of seal used on rated and sound-controlled openings in multi-family, office, and institutional buildings, not a residential foam weatherstrip.