Cal-Royal C-550 Silicone Adhes...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$30.51
Cal-Royal Cal-Royal C-550 Silicone Adhesive Weatherstrips CAL-C-550

Cal-Royal C-550 Silicone Adhesive Weatherstrip for Wood and Hollow Metal Frames

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Model: C-550B-17
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$30.51
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Cal-Royal C-550 Silicone Adhesive Weatherstrip for Wood and Hollow Metal Frames

The Cal-Royal C-550 Silicone Adhesive Weatherstrip is engineered to deliver an energy-efficient door seal that restricts air, light, smoke, and insects from passing around the opening. This adhesive-backed silicone rubber gasket begins compressing at 3/16" and can compress to seal gaps up to a 1/16", making it a reliable choice for both wood and hollow metal door frames. Built with 3M adhesive tape for strong initial adhesion and long-term holding power, the C-550 is engineered and tested for durability and reliable performance to meet or exceed industry standards for door weather sealing.

Key Features

  • Compression Range: Seal begins compressing at 3/16" and compresses to close gaps up to 1/16" for a dependable seal.
  • High-Temperature Tolerance: Effective between -58°F and 450°F, suitable for a wide range of climates and applications.
  • Premium Adhesive System: Made from silicone rubber with 3M adhesive tape, providing strong initial adhesion and long-term holding power.
  • Cost-Effective Sealing: Provides a simple and cost-effective way to create a seal around your door frame.
  • Chemical and Environmental Resistance: Non-toxic and self-extinguishing; resistant to sunlight, ozone, oxidation, weather, water, and flames.
  • 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 door frames for flexible installation options.

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 C-550?

Cal-Royal C-550 weatherstripping delivers professional-grade sealing performance with a silicone rubber and 3M adhesive construction rated for effective use between -58°F and 450°F. Engineered and tested to meet or exceed industry standards, this weatherstrip offers a dependable, cost-effective solution for restricting air, light, smoke, and insects around wood and hollow metal door openings in demanding commercial applications.

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 C-550B-17 – Frequently Asked Questions

1) How big a gap will the Cal-Royal C-550 weatherstrip actually seal on a door frame?
The C-550 silicone gasket starts compressing at 3/16 inch and squeezes down to close gaps as tight as 1/16 inch. So it works where the door leaf sits within about 3/16 inch of the stop. If your opening has a bigger, uneven gap than that, an adhesive gasket this size won't take it up, and you want an adjustable jamb seal instead, like the Hager 864S with its neoprene insert.
2) Will Cal-Royal C-550 adhesive weatherstrip stick to a hollow metal frame, or is it only for wood?
Both. The C-550 is built for wood and hollow metal door frames, and it holds with 3M adhesive tape for strong initial grab and long-term hold. There is no kerf, screw, or routing involved, so it presses on to a clean, flat frame face. That is what makes it a common fix on existing openings where you cannot cut a kerf into the jamb.
3) Does the Cal-Royal C-550 stop smoke, or do I need a rated smoke seal?
The C-550 restricts air, light, smoke, and insects around the opening, and the silicone is non-toxic and self-extinguishing. That said, it is sold as a general perimeter gasket, not as a labeled fire door assembly component. If your door carries a fire label and the AHJ is asking for listed gasketing, order a product sold as fire rated, such as the Pemko 68 door top weatherstrip or the Pemko Q103W kerf-in foam seal.
4) What is the closest press-on alternative to the Cal-Royal C-550 silicone adhesive weatherstrip?
The Hager 726S smoke seal weatherstrip is the nearest match in installation method. It is a press-on weatherstrip in a charcoal finish, so like the C-550 it adheres directly to the stop face of a wood or hollow metal frame rather than requiring a kerf or screw-applied carrier. The C-550 differs in material and range: it is a silicone rubber gasket with 3M adhesive tape, rated for use between -58 degrees F and 450 degrees F, offered in black and white and in lengths from 17 inches up to 510 inches.
5) What weatherstrip should I use if the door frame is kerfed instead of flat-faced?
A kerf-in product is the right choice there. The Pemko Q103W series is a kerf-in foam weatherstrip with an extended flange measuring 1-1/4 inches by 3/16 inch, and it is fire rated. It anchors into the saw kerf cut in the frame stop. The Cal-Royal C-550 is an adhesive-backed silicone gasket that mounts to the face of a wood or hollow metal frame, so it is the choice when there is no kerf to seat into.
6) Is the Cal-Royal C-550 the right seal for a fire-rated opening?
For an opening where the head and jamb gasketing has to carry a fire rating, look at the Pemko 68 fire-rated door top weatherstrip, supplied at 40 inches with a black sponge neoprene insert, or the Pemko Q103W kerf-in foam weatherstrip, which is also fire rated. The Cal-Royal C-550 is a silicone rubber gasket described as non-toxic and self-extinguishing and resistant to sunlight, ozone, oxidation, weather, water, and flames, and it seals against air, light, smoke, and insects around the opening.
7) What length of C-550 weatherstrip do I need for a standard single door opening?
The C-550 comes in 17, 20, 25, 204, and 510 inch lengths, in black or white. For a single opening you are sealing two jambs plus the head, so the long rolls are what most people order: 204 inches covers a typical 3070 opening with margin, and 510 inches lets you do several doors off one roll. The short 17, 20, and 25 inch pieces suit patching a section or sealing a small hatch or cabinet opening.
8) Can silicone adhesive weatherstrip handle a boiler room or an unheated exterior door in a cold climate?
The C-550 silicone rubber gasket stays effective from -58F to 450F, which covers both ends of that range: a mechanical or boiler room where surface temperatures run high, and an exterior door in a hard winter climate. It also resists sunlight, ozone, oxidation, weather, and water, so a south-facing exterior jamb won't chalk it out the way a foam tape would.
9) Adhesive weatherstrip vs kerf-in weatherstrip: which one should I use on my door jambs?
It comes down to whether the jamb has a kerf. The C-550 is adhesive-backed and presses onto the face of a wood or hollow metal frame, so it retrofits an existing jamb with no machining. A kerf-in seal like the Pemko Q103W needs a saw kerf in the stop to receive the fin, which is normal on new frames ordered prepped. Adhesive is the retrofit answer; kerf-in is the answer when the frame is already cut for it.
10) What else could I use instead of Cal-Royal C-550 adhesive weatherstrip?
Depends on where the seal has to go. For a press-on smoke seal, Hager makes the 726S in a charcoal finish. For a jamb seal with an insert rather than a solid gasket, the Hager 862S comes in 48 inch with a neoprene insert for smoke and draft control, and the 864S is an 84 inch clear anodized aluminum adjustable jamb seal, also neoprene. The aluminum-carrier options are screw-applied jamb stripping rather than a stick-on gasket, so they suit a frame you can drill.
11) Do I need any hardware or tools to install Cal-Royal C-550 weatherstrip?
No fasteners, no drilling. The C-550 carries 3M adhesive tape on the back, so installation is cut to length and press on. What matters is the frame face being clean and dry before you set it, because the adhesive's holding power is doing all the work. A tape measure and a sharp knife or shears are the whole tool list.
12) Can I order the Cal-Royal C-550 in place of a Hager 862S for smoke and draft control?
They seal the same kind of opening but they are not the same part. The Hager 862S is a 48 inch weatherstrip with a neoprene insert for smoke and draft control, supplied as a carrier and insert at a set length. The Cal-Royal C-550 is a silicone rubber gasket with 3M adhesive tape that restricts air, light, smoke, and insects, ordered in 17, 20, 25, 204, and 510 inch lengths in black or white. If a specification calls out an aluminum carrier with a replaceable neoprene insert, the 862S is what meets it.
13) Which weatherstrip stands up to the widest temperature swing for an exterior or unconditioned opening?
The Cal-Royal C-550 is effective between -58 degrees F and 450 degrees F and is resistant to sunlight, ozone, oxidation, weather, and water, and impermeable to mildew and fungus. Among the alternatives, the Pemko 68 uses a black sponge neoprene insert and the Hager 864S pairs a neoprene insert with a clear anodized aluminum carrier, both elastomer inserts in a metal or extruded body rather than an adhesive-mounted silicone gasket.
14) I need to gasket a long run of frames across a building. Which of these covers the most opening per order line?
The Cal-Royal C-550 comes in 204 inch and 510 inch lengths as well as 17, 20, and 25 inch pieces, in black and white, so a continuous run can be cut to each head and jamb from one length. The fixed-length alternatives are supplied per piece: the Pemko 68 door top weatherstrip at 40 inches, the Hager 862S at 48 inches, and the Hager 864S jamb weatherstrip at 84 inches.
15) Is the C-550 weatherstrip suitable for commercial buildings or is it a residential product?
Cal-Royal classes the C-550 as commercial, and the typical uses run to office buildings, schools, healthcare, retail, industrial and warehouse space, multi-tenant residential, and government buildings. For a property manager standardizing across a portfolio, the black and white options let you match dark bronze or aluminum-painted frames and white-painted frames from the same part.
16) Will weatherstrip mildew or break down on a humid exterior opening?
Silicone rubber is what makes the difference here. The C-550 is impermeable to mildew and fungus and won't degenerate under normal exposure, which is the usual failure mode for foam and sponge tapes on humid or coastal openings. It also resists water and flames.
How fast can I get the Cal-Royal C-550B-17 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 C-550B-17 come with a warranty?
Absolutely. The Cal-Royal C-550B-17 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 C-550B-17?
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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