NGP 2525 Self-Adhesive Silicon...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$41.99
$19.77
NGP NGP 2525 Self-Adhesive Gasketing, Silicone Bulb Smoke Seal NGP-2525

NGP 2525 Self-Adhesive Silicone Bulb Smoke Seal Gasketing with Fire Rating

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Model: 2525C-17
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$41.99
$19.77
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NGP Self-Adhesive Silicone Bulb Smoke Seal Gasketing with Fire Rating

Professional Fire-Rated Door Sealing Solution

The NGP Self-Adhesive Silicone Bulb Smoke Seal Gasketing delivers professional-grade fire protection and smoke control for commercial door applications. This synthetic rubber polymer siloxane gasketing features 3/8" wide x 1/4" tall dimensions with exceptional temperature performance from -100 F to 500 F. UL certified to ANSI/UL10B, ANSI/UL10C, and ANSI/UL1784 Category 'H' standards, this gasketing complies with NFPA 80 and NFPA 252 for hollow metal fire doors rated up to 3 hours and wood fire doors rated up to 90 minutes.

Professional Features & Benefits

  • Precise Dimensions: 3/8" wide x 1/4" tall silicone bulb design provides optimal sealing performance for standard door applications.
  • Extreme Temperature Performance: Operates reliably from -100 F to 500 F while maintaining flexibility and sealing integrity at temperature extremes.
  • Fire Rating Certifications: UL certified to ANSI/UL10B, ANSI/UL10C, and ANSI/UL1784 Category 'H' for hollow metal fire doors up to 3 hours and wood fire doors up to 90 minutes.
  • Advanced Siloxane Construction: Synthetic rubber polymer material provides excellent flexibility, memory, and resistance to ozone, UV radiation, and aging.
  • High-Performance Adhesive: Modified acrylic pressure sensitive adhesive delivers high initial adhesion and long-term holding power with temperature range -30 F to 250 F for permanent mounting.
  • Chemical Resistance: Resistant to aging, weathering, UV radiation, water, detergent, alcohol, and chemical exposure for demanding environments.
  • Fire Suppression System Compatible: Recommended for areas using FM200 or Halon fire suppression systems with flame and moisture resistant properties.
  • BHMA Certification: Certified to ANSI/BHMA A156.22 performance tests for heat, cold, air infiltration, and smoke infiltration compliance.

Technical Specifications

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

Professional Applications

  • Commercial Fire-Rated Door Systems
  • Healthcare Facility Smoke Control
  • Educational Institution Fire Safety
  • Industrial Facility Fire Protection
  • Government Building Code Compliance
  • Multi-Tenant Residential Fire Doors
  • High-Rise Building Smoke Management

Why Choose NGP Quality?

NGP gasketing products deliver professional-grade fire protection with UL certified performance to multiple ANSI standards including UL10B, UL10C, and UL1784 Category 'H'. The synthetic rubber polymer siloxane construction provides exceptional durability with temperature performance from -100 F to 500 F and one-year shelf life when properly stored. Engineered for demanding commercial fire door applications where code compliance and reliable smoke control are essential.

Product Specs

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

NGP 2525C-17 – Frequently Asked Questions

1) Will NGP 2525 smoke seal work on a 3-hour rated hollow metal fire door?
Yes. The NGP 2525 silicone bulb gasketing is UL certified to ANSI/UL10B, ANSI/UL10C and ANSI/UL1784 Category 'H', and it complies with NFPA 80 and NFPA 252 for hollow metal fire doors rated up to 3 hours. On wood fire doors the rating tops out at 90 minutes, so a 3-hour opening needs to be hollow metal for this seal to carry the label.
2) Is a self-adhesive smoke seal acceptable on a fire door, or do I need a screw-applied perimeter gasket?
Both types are used on rated openings, and the difference is how they mount. The NGP 2525 is a silicone bulb held by a modified acrylic pressure sensitive adhesive, so it goes on the frame stop with no drilling and no fasteners, which is why it is the common choice for retrofitting existing rated frames in occupied buildings. A screw-applied option like the Cal-Royal PG-601 uses an aluminum channel with a vinyl insert, which is more resistant to being peeled or picked at in a high-abuse corridor but means fastening into the frame. If you are gasketing dozens of existing doors on a schedule, the adhesive bulb is the faster install.
3) How much gap will the NGP 2525 silicone bulb close on a door frame?
The bulb is 3/8 inch wide by 1/4 inch tall, so it is sized for the normal clearance between a door face and the frame stop, not for a sprung or badly out-of-plumb frame. Measure your actual gap at the head and both jambs first: if the door is standing off the stop by more than the bulb can compress, the seal will not make continuous contact and you will not get the smoke seal the rating depends on.
4) Do I need to buy the gasketing and the door bottom separately for a fire rated opening?
Yes, they are separate items. The 2525 handles the head and jambs only, which leaves the gap under the door open. A rated smoke opening also needs the bottom sealed, so plan on an automatic door bottom or a door sweep in the same order. NGP publishes both in the same gasketing and automatic door bottoms catalog, so the door bottom that suits your undercut can be matched to this perimeter seal.
5) What is the difference between NGP 2525 smoke seal gasketing and Cal-Royal PG-601 perimeter gasketing?
They seal the same perimeter but mount in completely different ways. The NGP 2525 is a self-adhesive silicone bulb smoke seal that presses onto a clean, prepped stop face using a modified acrylic pressure sensitive adhesive, with a 3/8 inch wide by 1/4 inch tall bulb and a service range of -100 F to 500 F. The Cal-Royal PG-601 is an aluminum channel perimeter gasketing with a vinyl insert, so the seal is carried in a rigid channel that fastens to the frame and the vinyl insert rides in that channel. If the frame face is painted, uneven, or already drilled, the fastened aluminum channel of the PG-601 is the mechanical approach; where an adhesive-mount seal is wanted on a finished frame with no new fastener holes, the 2525 is the silicone bulb version.
6) Can Cal-Royal PG-601 gasketing be used in place of NGP 2525 on a fire-rated door?
Treat these as different specifications rather than interchangeable ones. The NGP 2525 silicone bulb gasketing is UL certified to ANSI/UL10B, ANSI/UL10C, and ANSI/UL1784 Category H, complies with NFPA 80 and NFPA 252 for hollow metal fire doors rated up to 3 hours and wood fire doors up to 90 minutes, and is certified to ANSI/BHMA A156.22 for heat, cold, air infiltration, and smoke infiltration. The Cal-Royal PG-601 is an aluminum channel perimeter gasketing with a vinyl insert. When the opening is a rated assembly and the drawing calls out smoke and draft control, the 2525 is the part that carries the UL1784 Category H and NFPA 80 language; the PG-601 is the choice where the requirement is perimeter weather and light sealing in an aluminum channel.
7) Will this smoke seal hold up in a boiler room or an unheated exterior vestibule?
The silicone itself runs from -100 F to 500 F, but the adhesive is the limiting factor at -30 F to 250 F. That covers boiler rooms, mechanical spaces, cold storage vestibules and unconditioned stairwells in almost any climate. The siloxane compound also resists ozone, UV, water, detergent, alcohol and general chemical exposure, so wash-down corridors and areas with sunlight through a glass front are not a problem for it.
8) Does NGP 2525 gasketing meet ANSI/BHMA A156.22 for smoke and air infiltration?
Yes. The 2525 is certified to ANSI/BHMA A156.22 performance tests covering heat, cold, air infiltration and smoke infiltration. For a facility standardizing its gasketing spec, that is the number to cite alongside the UL1784 Category 'H' listing, which is the smoke leakage test the door assembly gets judged on.
9) Can I use this gasketing on doors in a room protected by an FM200 or Halon clean agent system?
Yes, the 2525 is recommended for areas using FM200 or Halon suppression, and that is a real distinction. Clean agent systems only work if the room holds the agent concentration, so the enclosure has to be reasonably tight. A flame and moisture resistant silicone bulb on the door perimeter is part of getting a data center, server room or switchgear room to hold its agent.
10) I need gasketing for a door shoe or bottom rail application, not the door stop. What should I use?
The NGP 2525 is a stop-applied self-adhesive silicone bulb seal at 3/8 inch wide by 1/4 inch tall, sold in 17, 20, 21, and 25 foot rolls in charcoal and white, and it is meant for the head and jamb perimeter of the frame. For work at the bottom of the door, the Cal-Royal PG-601 sits in the Door Shoes Series, which is the family that addresses the door bottom rather than the stop face. A full opening often takes both: the bulb seal around the perimeter and a separate bottom-of-door product to close the threshold gap.
11) Is NGP 2525 gasketing rated for commercial use or is it a residential weatherstrip?
Strictly commercial. The 2525 is a fire rated smoke seal built for hollow metal and wood rated door assemblies in healthcare, schools, government buildings, high rises and multi-tenant residential fire doors. It is not a general purpose exterior weatherstrip, and specifying it on a non-rated interior door is spending fire rated money for no code benefit.
12) How long can I store rolls of NGP 2525 before installing them?
One year is the shelf life when the rolls are stored properly. That matters if you are buying gasketing for a phased retrofit across a portfolio: order against the doors you will actually seal this year rather than stockpiling, because the pressure sensitive adhesive is what ages, and a roll that will not stick is a roll that fails the smoke seal.
How fast can I get the NGP 2525C-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 NGP 2525C-17 come with a warranty?
Absolutely. The NGP 2525C-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 NGP 2525C-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
Why buy the NGP 2525C-17 from ZenSupply?
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