NGP 4 Series Vinyl Stop Strip ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$31.95
NGP 4 Series Vinyl Stop Strip 1/4" x 9/16" with Weather Seal Protection

NGP 4 Series Vinyl Stop Strip 1/4" x 9/16" with Weather Seal Protection

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Model: 4V-36
$31.95
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$31.95
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NGP 4 Series Vinyl Stop Strip 1/4" x 9/16" with Weather Seal Protection

Professional Weather Sealing Solution for Commercial Thresholds

The NGP 4 Series Vinyl Stop Strip provides essential weather resistance when used with saddle thresholds in commercial door applications. This precision-engineered strip measures 1/4" tall x 9/16" wide and features aluminum alloy 6063 construction with T5 temper for durability. The integrated black vinyl seal creates an effective barrier against weather infiltration while maintaining smooth door operation.

Professional Features & Benefits

  • Precise Dimensions: 1/4" tall x 9/16" wide profile designed for optimal threshold integration and weather sealing performance.
  • Heavy-Duty Construction: Aluminum alloy 6063 with T5 temper provides exceptional durability and corrosion resistance for long-term commercial use.
  • Weather Seal Integration: Works in conjunction with saddle thresholds to provide comprehensive weather resistance against air and water infiltration.
  • Lightweight Design: At only 0.14 lbs./ft., the strip minimizes structural load while maintaining robust sealing performance.
  • Complete Installation Hardware: Includes #6 self-tapping machine screws for secure mounting and professional installation.
  • Durable Vinyl Seal: Black vinyl component provides flexible weather sealing that maintains effectiveness through repeated door cycles.
  • Professional Finish Options: Available in dark bronze or mill finish to complement various architectural specifications.

Technical Specifications

  • Department: Door Hardware
  • Product Category: Door Trim and Accessories
  • Product Group: Door Trim and Accessories
  • Product Model: Series 4
  • Product Subgroup: Door Thresholds
  • Product Type: Commercial Thresholds
  • Subcategory: Thresholds

Professional Applications

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

Why Choose NGP Quality?

NGP 4 Series threshold accessories deliver professional-grade reliability with aluminum alloy 6063 T5 temper construction engineered for demanding commercial applications. The precision 1/4" x 9/16" profile ensures optimal weather sealing performance when integrated with compatible saddle thresholds, providing dependable protection against environmental infiltration where consistent performance is essential.

Manufacturer Resources

NGP Threshold Catalog

Product Specs

Subcategory:
Thresholds
Product Group:
Door Trim and Accessories
Product Subgroup:
Door Thresholds
Product Type:
Commercial Thresholds
Product Model:
Series 4
Product Category:
Door Trim and Accessories
Department:
Door Hardware
Commercial/Residential:
Commercial

NGP 4V-36 – Frequently Asked Questions

1) Is the NGP 4 Series stop strip a threshold on its own, or do I still need a saddle threshold under it?
It's a stop strip, not a threshold. The NGP 4 Series is a 1/4 inch tall by 9/16 inch wide aluminum extrusion with a bumper seal in it, and it mounts onto a saddle threshold to seal the gap where the door closes against it. If the threshold itself is what you're replacing, that's a separate part. Pemko's 154 Series is a flat saddle at 1/2 inch x 5 inch, and the 170 Series is a flat saddle at 1/2 inch x 4 inch with a fluted top. Order the 4 Series stop strip when the saddle is already down and sound and you just need the seal at the door line, or order both together on a new opening.
2) How much clearance does my door need under it to take the NGP 4 stop strip?
The strip stands 1/4 inch tall, so it adds that much above whatever saddle it lands on. The bottom of the door, plus any sweep or shoe already on it, has to clear the top of the threshold plus that 1/4 inch when the door swings, and the seal takes up the last of the gap once the door is closed against it. Footprint is 9/16 inch wide, so the saddle needs that much flat top surface to mount it on, positioned so the door stops against the seal rather than riding over the aluminum.
3) Which saddle thresholds are fire-rated for a labeled door opening?
Two in the Pemko line are described as fire-rated: the 154 Series, a fire-rated commercial flat saddle threshold at 1/2 inch by 5 inches, and the 157 Series, a fire-rated offset saddle threshold at 5-1/2 inches by 3/4 inch in aluminum. On a labeled opening the threshold is the piece to settle first, since it is what sits in the fire-rated assembly. The NGP 4 Series is the sealing strip that rides on a saddle threshold - 1/4 inch by 9/16 inch, aluminum 6063-T5, black vinyl seal - and it is specified after the threshold under it, not in place of one.
4) Is there a threshold that already has the seal built in instead of adding a separate stop strip?
Yes. The Pemko 159 Series is a latching panic saddle threshold with an integrated gasket and 9/16 inch door clearance, so the seal arrives as part of the threshold rather than as a second piece screwed to it. The NGP 4 Series takes the other approach: it is a 1/4 inch tall by 9/16 inch wide aluminum 6063-T5 stop strip with a seal carried in it, mounted to a saddle threshold, and it is ordered with the bumper seal you want in vinyl, silicone, or NGP-TPV. Built-in gasket means one part to specify and one part to replace as an assembly; a separate stop strip means the seal material is a choice you make at order time and the strip is a discrete piece on the threshold.
5) The door sits above the sill on an offset, not flush on a flat saddle - what should I use?
An offset opening wants an offset threshold rather than a flat saddle with a strip on top. The Pemko 157 Series is an offset saddle threshold at 5-1/2 inches by 3/4 inch in aluminum, shaped with a step to pick up the change in level, and it is fire-rated. The NGP 4 Series vinyl stop strip is built for the flat case: at 1/4 inch tall by 9/16 inch wide in aluminum 6063-T5 it lays a low sealing rib on a saddle threshold, so it depends on the threshold underneath it being the right profile for the sill. Measure the drop from door bottom to sill before deciding which of the two paths the opening is on.
6) What is the bumper seal option on the NGP 4 stop strip, and which one do I have to specify when ordering?
Three seal materials, and one of them has to be called out on the order. The choices are N (NGP-TPV), S (silicone) and V (vinyl). V is the black vinyl seal the 4 Series is normally shown with. None of the three limits anything else: every seal option is built in both mill aluminum and dark bronze, in both the 36 inch and 72 inch lengths, so you can pick the seal on performance and the finish on appearance independently.
7) Can I get the NGP 4 stop strip in a bronze finish to match my existing entrance hardware?
Dark bronze and mill aluminum are the two finishes on the 4 Series. Dark bronze is the one to order where the frames, thresholds and door bottoms on the opening are already bronze; mill aluminum is the plain unfinished aluminum that sits quietly against standard aluminum saddles. Both finishes are made in all three seal types and both lengths, twelve combinations in total, so matching the finish across a building doesn't force you into a particular seal or length.
8) Does the NGP 4 stop strip come with fasteners, or do I supply my own?
#6 self-tapping machine screws come in the box, so there's nothing to source separately for a straightforward install. Worth knowing before you schedule the work: it's a screw-applied strip, which means the threshold gets drilled to mount it, not a gasket you push into a kerf. Have a drill and the right bit on the truck along with the strip.
9) Can I use the NGP 4 to replace a worn-out seal in a threshold I already have?
Only by mounting a whole new strip. The 4 Series is a complete aluminum extrusion with the seal carried in it, fastened down with the #6 self-tapping screws that ship with it, so it screws onto the top of the saddle rather than sliding into an existing groove. On a saddle with a flat top face wide enough to take the 9/16 inch profile, that works and gets you a fresh seal at the door line without pulling the threshold. If your threshold takes a slide-in gasket, this is not that part.
10) My exit device latches into the floor. Do I use a stop strip or a different threshold?
Where a panic device latches down into the threshold, Pemko's 159 Series is the part made for it: a latching panic saddle threshold with the gasket built into the extrusion and 9/16 inch of door clearance, so you get the strike and the seal in one piece instead of a plain saddle plus a separate stop strip. If the exit device latches into the frame head or the opposite leaf and the threshold is just a threshold, then a stop strip like the NGP 4 Series on the existing saddle handles the sealing.
11) I need an ADA compliant threshold for a public entrance - which one, and where does a stop strip fit in?
The Pemko 154 Series is an ADA compliant commercial flat saddle threshold at 1/2 inch by 5 inches, and the Pemko 170 Series is an ADA compliant commercial flat saddle at 1/2 inch by 4 inches with a fluted top, so the accessible profile is decided by the threshold itself. The NGP 4 Series is a stop strip that sits on the threshold at 1/4 inch tall and 9/16 inch wide, forming a raised sealing rib against the door rather than part of the walking surface. On an accessible entrance, confirm the height of the finished assembly at the point of crossing with the threshold you pick.
12) The seal on my existing threshold is worn out - do I replace the whole threshold or just the strip?
It depends on how the seal is carried. On a threshold like the Pemko 159 Series, the gasket is integrated into the latching panic saddle threshold, so the seal is part of that unit. Where the seal sits in a separate stop strip, the strip is the part that comes off: the NGP 4 Series is a 1/4 inch by 9/16 inch aluminum 6063-T5 stop strip supplied in 36 inch and 72 inch lengths, in mill aluminum or dark bronze, with the bumper seal specified as vinyl, silicone, or NGP-TPV, and it ships with #6 self-tapping machine screws for remounting. Look at whether the sealing element is screwed to the threshold or formed into it before ordering either one.
13) Will the NGP 4 stop strip hold up on an exterior entrance that gets weather?
Extruded from 6063 aluminum alloy in T5 temper, which is where the corrosion resistance on an exterior opening comes from, and NGP builds the 4 Series as a commercial part rather than a residential one. It's used on office, healthcare, education, retail, industrial and multi-tenant residential entrances. Weight is 0.14 lbs per foot, so even the 72 inch piece is under a pound and adds nothing meaningful to the saddle it sits on.
14) The NGP 4 Series and the Pemko 159 both say 9/16 inch - are those the same measurement?
No, and they are easy to mix up when cross-shopping. On the NGP 4 Series, 9/16 inch is the width of the stop strip itself, which measures 1/4 inch tall by 9/16 inch wide in aluminum 6063-T5. On the Pemko 159 Series, the 9/16 inch figure is door clearance on a latching panic saddle threshold with an integrated gasket - the gap the threshold is designed to work under. One number describes the footprint of a part you screw down, the other describes the space between door bottom and threshold, so they are not comparable figures and should not be matched to each other when specifying.
How fast can I get the NGP 4V-36 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 4V-36 come with a warranty?
Absolutely. The NGP 4V-36 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 4V-36?
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 4V-36 from ZenSupply?
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Product Reviews

  • 5
    Vinyl Stop Strip

    Posted by Terry Helms on Sep 24th 2025

    This was simple to install.

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