Cal-Royal INT-880 Adhesive Wea...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$80.19
$72.15
Cal-Royal Cal-Royal INT-880 Adhesive Weatherstrips with Intumescent CAL-INT-880

Cal-Royal INT-880 Adhesive Weatherstrips with Intumescent Seal for Wood or Hollow Metal Frames

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Model: INT-880B-3684
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$80.19
$72.15
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Cal-Royal INT-880 Adhesive Weatherstrips with Intumescent Seal for Wood or Hollow Metal Frames

Cal-Royal INT-880 Adhesive Weatherstrips with Intumescent are engineered and tested for durability and reliable performance, delivering an energy-efficient door seal that restricts air, light, smoke, and insects from around the opening. The seal begins compressing at 1/4" and compresses to seal gaps up to 1/8", making it a simple, cost-effective solution for wood or hollow metal frames. Constructed from Silicone Rubber with 3M Adhesive Tape, this weatherstrip is rated for high temperature applications between -58°F and 450°F.

Key Features

  • Compression Range: Seal begins compressing at 1/4" and compresses to seal up to a 1/8" gap for a consistent, reliable barrier around the door frame.
  • High-Temperature Silicone Construction: Made from Silicone Rubber with 3M Adhesive Tape, effective between -58°F and 450°F for use across a wide range of climates and applications.
  • Strong Self-Adhesive Backing: High-quality self adhesive delivers strong initial adhesion and long-term holding power for a dependable, lasting installation.
  • Simple, Cost-Effective Sealing: Provides an easy way to create a reliable seal around your door frame without complex hardware or tools.
  • Non-Toxic and Self-Extinguishing: Resistant to sunlight, ozone, oxidation, weather, water, and flames for long-term outdoor and indoor durability.
  • Mildew and Fungus Resistant: Impermeable to mildew and fungus and will not degenerate under normal exposure conditions.
  • Frame Compatibility: Designed for use on Wood or Hollow Metal Frames, making it a versatile weatherstripping solution for commercial door openings.

Technical Specifications

  • Product Group: Door Trim and Accessories
  • Product Subgroup: Astragals, Gaskets and Weatherstripping
  • Product Type: Weatherstripping
  • Subcategory: Gaskets & Weatherstripping
  • Commercial/Residential: Commercial
  • Product Category: Door Trim and Accessories
  • Department: Door Hardware

Typical Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Cal-Royal INT-880?

Cal-Royal INT-880 weatherstrips are built from silicone rubber with 3M adhesive tape and are rated for use between -58°F and 450°F, reflecting engineering focused on durability across demanding temperature extremes. Resistance to sunlight, ozone, oxidation, weather, water, flames, mildew, and fungus ensures the seal maintains its integrity under normal exposure over time. For facilities needing a dependable, energy-efficient door seal for wood or hollow metal frames, the INT-880 offers a straightforward, professional-grade solution engineered to meet demanding commercial performance expectations.

Product Specs

Product Group:
Door Trim and Accessories
Product Subgroup:
Astragals, Gaskets and Weatherstripping
Product Type:
Weatherstripping
Subcategory:
Gaskets & Weatherstripping
Commercial/Residential:
Commercial
Product Category:
Door Trim and Accessories
Department:
Door Hardware

Cal-Royal INT-880B-3684 – Frequently Asked Questions

1) How big a gap will the Cal-Royal INT-880 weatherstrip actually seal on a door frame?
The INT-880 silicone seal starts compressing at a 1/4 inch gap and compresses down to close gaps up to 1/8 inch. So if the gap between your door edge and the stop is running wider than 1/4 inch, this adhesive strip won't take it up on its own; you'd be looking at an adjustable jamb-mounted seal instead, like the Hager 864S adjustable jamb weatherstrip with a neoprene insert, which can be shifted to meet the door.
2) Can I stick Cal-Royal INT-880 weatherstrip on a hollow metal frame, or is it only for wood?
Both. The INT-880 is made for wood or hollow metal frames, and it mounts with 3M adhesive tape rather than screws or a kerf, so there's no routing or drilling into the frame. That also means the frame face has to be clean, smooth, and sound for the adhesive to hold. If your frames are already kerfed, a kerf-in product such as the Pemko Q103W foam weatherstrip is the fit for that prep instead.
3) What sizes and colors does the Cal-Royal INT-880 weatherstrip come in, and which one covers a standard 3-0 x 7-0 door?
Three set sizes, each in black or white: 36 x 84 inches, 48 x 96 inches, and 96 x 96 inches. A standard 3-0 x 7-0 opening (36 by 84 inches) is covered by the 36 x 84 set. For a 4-foot-wide or 8-foot-tall opening, step up to the 48 x 96; the 96 x 96 set suits a pair of doors or an 8-foot-wide frame.
4) Can I use the Cal-Royal INT-880 on a fire-rated door opening?
Fire door openings are governed by the listing on the specific gasketing, and for that job the safer specification is a product carried as fire-rated outright, like the Pemko 68 fire-rated door top weatherstrip with a black sponge neoprene insert or the Pemko Q103W kerf-in foam strip. Use the INT-880 where you need a durable, high-temperature draft, smoke, light, and insect seal on wood or hollow metal frames.
5) What is the closest press-on alternative to the Cal-Royal INT-880 adhesive weatherstrip?
The Hager 726S smoke seal weatherstrip is the nearest press-on equivalent. Like the INT-880, it mounts to the frame face without a kerf or a screw-applied housing, and it is offered in a charcoal finish. The INT-880 differs in material and range: it is silicone rubber with 3M adhesive tape, rated between -58 degrees F and 450 degrees F, and it begins compressing at 1/4 inch to seal gaps up to 1/8 inch, in black or white and in 36 x 84, 48 x 96, and 96 x 96 inch sizes.
6) The frame is kerfed rather than flat. What weatherstrip should be used instead of the Cal-Royal INT-880?
Use a kerf-in seal. The Pemko Q103W series is a kerf-in foam weatherstrip with an extended flange, 1-1/4 inch by 3/16 inch, and it is fire rated. The Cal-Royal INT-880 is an adhesive-applied silicone strip intended for the face of wood or hollow metal frames, so a kerfed jamb calls for the Q103W profile that seats in the saw kerf instead.
7) Which weatherstrip holds up in a boiler room or other high-heat area where a neoprene seal is a concern?
The Cal-Royal INT-880 is the high-temperature choice among these. It is silicone rubber with 3M adhesive tape rated for service between -58 degrees F and 450 degrees F, and it resists sunlight, ozone, oxidation, weather, water, flames, mildew, and fungus. The comparable seals use neoprene inserts, including the Hager 862S and the Hager 864S, and the Pemko 68 uses a black sponge neoprene insert, so material choice is the deciding factor for a hot mechanical space.
8) Will Cal-Royal INT-880 seal hold up on a boiler room or mechanical room door that gets hot?
Temperature range on the INT-880 silicone is -58F to 450F, which is well past what a mechanical or boiler room door jamb sees. Silicone also resists ozone, oxidation, water, and sunlight, so the same strip works on an exterior opening in a cold climate. Standard foam and neoprene seals are the ones that go hard and crumble at those extremes.
9) Does adhesive weatherstrip like the Cal-Royal INT-880 stop smoke and light, or just drafts?
The INT-880 restricts air, light, smoke, and insects around the opening, and the silicone is non-toxic and self-extinguishing. It's a compression seal at the jamb, so it does nothing about the gap under the door; you'd still want a door bottom or sweep to finish the opening.
10) Should I use a peel-and-stick weatherstrip or a screw-on metal jamb seal on my commercial doors?
Adhesive silicone like the INT-880 goes on with no tools, no drilling, and no frame prep, which is what makes it workable on occupied buildings and on frames you don't want to cut into. Screw-applied aluminum jamb seals, such as the Hager 862S with its neoprene insert or the Hager 864S adjustable clear anodized jamb strip, hold their position mechanically and can be re-tensioned, which matters on high-traffic doors that get slammed. On lower-cycle openings, offices, storage, and mechanical rooms, the adhesive strip does the same sealing job for a lot less labor.
11) I manage a building with a lot of doors. Will Cal-Royal INT-880 weatherstrip stay stuck long term, or do I have to redo it every year?
The 3M adhesive backing is specified for strong initial grab plus long-term holding, and the silicone itself is impermeable to mildew and fungus and won't degenerate under normal exposure. Silicone is the reason it lasts: it resists sunlight, ozone, oxidation, water, and weather, which is what breaks down cheap foam tape after a season. For standardizing across a portfolio, the strip is offered in black and white, so you can match dark bronze or painted frames and white frames from the same product.
12) Do I need anything else to install Cal-Royal INT-880, like screws or a special tool?
No extra hardware. The strip carries its own 3M adhesive tape, so it's cut to length and pressed onto the frame, no fasteners, no kerf, no tools. Screw-on and kerf-in alternatives, such as the Hager 726S press-on smoke seal or the Pemko Q103W kerf-in strip, exist for prep that's already in the frame; the INT-880 needs none of it.
13) What can be used instead of the Cal-Royal INT-880 when the gap around the jamb varies and needs to be dialed in?
The Hager 864S adjustable jamb weatherstrip is the option for a jamb that needs adjustment after hanging. It is an 84 inch clear anodized aluminum strip with a neoprene insert, and the aluminum carrier lets the insert be positioned against the door. The Cal-Royal INT-880 is a fixed adhesive silicone strip that begins compressing at 1/4 inch and seals gaps up to 1/8 inch, so it suits an opening whose gap is already within that range.
14) Is the Hager 862S a direct swap for the Cal-Royal INT-880 on a smoke and draft opening?
They serve the same opening but are not the same part. The Hager 862S is a 48 inch weatherstrip with a neoprene insert for smoke and draft control, so the sealing element is neoprene carried in a strip of that fixed length. The Cal-Royal INT-880 is silicone rubber with 3M adhesive tape, rated between -58 degrees F and 450 degrees F, non-toxic and self-extinguishing, and comes in black or white at 36 x 84, 48 x 96, or 96 x 96 inches. Match the material and the run length to the opening rather than treating them as interchangeable.
15) Is Cal-Royal INT-880 weatherstrip meant for commercial buildings or residential doors?
It's a commercial-duty product, used on office buildings, schools, healthcare, retail, industrial and warehouse space, multi-tenant residential, and government buildings. Nothing stops it working on a house door, but the sizing is built around commercial openings, up to 96 by 96 inches.
How fast can I get the Cal-Royal INT-880B-3684 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
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 Cal-Royal INT-880B-3684 come with a warranty?
Absolutely. The Cal-Royal INT-880B-3684 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Cal-Royal INT-880B-3684?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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