NGP HP90 Hardware Prep Filler ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,666.57
NGP HP90 Hardware Prep Filler for Fire Doors - 90 Minute Rated UL Certified Solution (10 Pack)

NGP HP90 Hardware Prep Filler for Fire Doors - 90 Minute Rated UL Certified Solution (10 Pack)

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Model: HP90-1.0

In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,666.57
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NGP Hardware Prep Filler for Fire Doors - 90 Minute Rated UL Certified Solution (10 Pack)

Professional Fire Door Hardware Preparation Solution

The NGP Hardware Prep Filler provides a UL certified solution for fire doors when removing existing hardware or installing new hardware types over existing preparations. This system is application certified on both hollow metal and wood fire-rated doors up to 90 minutes, with certification for use in combination with Gap Guard Fire Caulk to fill thru-holes between 1/2" diameter and 2-1/8" diameter. Certified for use in both US and Canada applications.

Professional Features & Benefits

  • 90-Minute Fire Rating: UL certified for hollow metal and wood fire doors rated up to 90 minutes for maximum fire protection compliance.
  • Dual Material Compatibility: Application certified on both hollow metal and wood fire-rated doors for versatile installation options.
  • Comprehensive Hole Filling: Certified for use with Gap Guard Fire Caulk to fill thru-holes between 1/2" diameter and 2-1/8" diameter openings.
  • Multi-Application Solution: Designed for removing existing hardware and installing new hardware types over existing preparations.
  • Dual Country Certification: Certified for use in both US and Canada for broad market compliance.
  • Complete Code Compliance: Meets ANSI/UL10C, IBC, NFPA 80, NFPA 252, CAN/ULC-S104, and ANSI/UL10B standards.
  • Convenient Packaging: Supplied in 10-pack quantities for efficient project completion and inventory management.
  • Positive Pressure Certified: UL certified under positive pressure conditions for enhanced fire protection performance.

Technical Specifications

  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Package Quantity: 10
  • Product Category: Door Trim and Accessories
  • Product Group: Door Trim and Accessories
  • Product Subgroup: Door Thresholds
  • Product Type: Prep Filler
  • Subcategory: Door Thresholds

Professional Applications

  • Commercial Fire Door Renovations
  • Educational Facility Safety Upgrades
  • Healthcare Institution Fire Code Compliance
  • Industrial Facility Fire Protection Systems
  • Government Building Safety Modifications
  • Multi-Tenant Residential Fire Door Maintenance
  • Retrofit Applications for Code Compliance

Fire Door Compliance Solution

This UL certified prep filler system ensures proper fire door integrity when modifying hardware configurations. The positive pressure certification and comprehensive standards compliance provide confidence in critical fire protection applications where door assembly integrity must be maintained.

Why Choose NGP Quality?

NGP Hardware Prep Filler delivers professional-grade fire protection with UL certification to multiple standards including ANSI/UL10C, NFPA 80, and CAN/ULC-S104 for 90-minute fire door applications. The dual material compatibility and positive pressure certification ensure reliable performance in demanding commercial fire protection applications where code compliance is essential.

Manufacturer Resources

NGP Threshold Catalog

Product Specs

Product Group:
Door Trim and Accessories
Product Subgroup:
Door Thresholds
Product Type:
Prep Filler
Commercial/Residential:
Commercial
Subcategory:
Thresholds
Product Category:
Door Trim and Accessories
Department:
Door Hardware
Package Quantity:
10

NGP HP90-1.0 – Frequently Asked Questions

1) Can I fill old lockset holes in a 90-minute fire door without voiding the rating?
That is exactly what the NGP HP90 hardware prep filler is for. It is UL certified for filling thru-holes in hollow metal and wood fire doors rated up to 90 minutes, used in combination with Gap Guard Fire Caulk. It covers holes from 1/2 inch up to 2-1/8 inch diameter, so a removed cylindrical lock bore, a deadbolt hole, or an old strike prep can be filled and the door assembly stays code compliant.
2) Does the NGP HP90 prep filler work on wood doors or only hollow metal?
Both. The HP90 is application certified on hollow metal and on wood fire-rated doors, so the same part works whether you are patching a steel door in a stairwell or a mineral-core wood door in a corridor.
3) Which diameter of the NGP HP90 filler do I order for a 2-1/8 inch lock bore?
The HP90 is sold by hole diameter in 1/2 inch, 1 inch, 1-1/2 inch, and 2 inch sizes. Size to the prep you are closing: a standard 2-1/8 inch cylindrical lock bore falls at the top of the certified range, which runs from 1/2 inch to 2-1/8 inch when the filler is used with Gap Guard Fire Caulk. Count your openings before ordering, since the filler ships 10 to a pack.
4) What else do I need to buy to install the NGP HP90 prep filler correctly?
The certification is for the filler used together with Gap Guard Fire Caulk. Order the caulk along with the plugs; without it you are outside the listed assembly. The filler itself comes 10 per pack.
5) Which fire door standards does the NGP HP90 filler comply with?
The HP90 is listed to ANSI/UL10C, ANSI/UL10B, NFPA 80, NFPA 252, IBC, and CAN/ULC-S104, and it is UL certified under positive pressure. That combination covers both US and Canadian jobs, which matters if you are standardizing a patch method across facilities in both countries.
6) Can I use the NGP HP90 filler on a door rated longer than 90 minutes?
No. The certification stops at 90 minutes. On a 2-hour or 3-hour opening this filler is outside its listing, and under NFPA 80 the usual alternatives are returning the door to the manufacturer for a listed repair or replacing the door leaf.
7) We are converting fire doors from knobs to levers and the new trim does not cover the old prep. Will this solve it?
Yes, that is the intended case. The HP90 is certified for removing existing hardware and installing new hardware types over existing preparations, so where the new escutcheon or rose leaves part of the old bore exposed, the filler plus Gap Guard Fire Caulk closes the thru-hole and keeps the assembly within its listing up to 90 minutes.
8) Is the NGP HP90 prep filler meant for commercial buildings or residential doors?
It is a commercial door hardware item, aimed at fire door work in schools, hospitals, government buildings, industrial plants, and multi-tenant residential buildings where the opening carries a rating. Typical use is a retrofit: hardware is being swapped to a different type and the old prep has to be closed before the new device goes on.
How fast can I get the NGP HP90-1.0 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 HP90-1.0 come with a warranty?
Absolutely. The NGP HP90-1.0 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 HP90-1.0?
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 HP90-1.0 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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