Underground Electrical & Broadband
Conduit Sealing Devices & Temporary Plugs
Conduit sealing devices are snap-in plugs that close exposed conduit and innerduct on the jobsite, keeping water, dirt, debris, and animals out until cable is pulled.
Innovative Plastics manufactures temporary conduit plugs in low-density polyethylene (LDPE) — a tough, flexible material that keeps its shape in heat and cold. Tapered, ribbed side walls give a tight friction fit that pushes in by hand and pulls back out without tools, so crews can seal and re-open a conduit run as many times as the job requires.
Temporary plugs are specified across underground electrical, broadband, and fiber-optic construction wherever open conduit, duct, or innerduct sits exposed before cabling. They are widely known by many names — poly pull plugs, universal plugs, flower-pot plugs, top-hat plugs, end plugs, and tri-plugs among them — but all do the same job: a clean, cost-effective temporary seal.
Every size ships by the case, in trade sizes from 1" through 8". Volume and distributor pricing is available, and sizes can be added to a quote request directly from the product page.
Sealing Devices products
1 product
Sealing devices vs. duct spacers vs. caps
Three product families cover the underground conduit lifecycle: sealing devices protect open conduit, duct spacers align conduit during the pour, and caps close conduit ends.
| Family | Primary purpose | Material | Size range |
|---|---|---|---|
| Sealing Devices (this page) | Seal and protect open conduit, ducts, and innerduct | Low-density polyethylene (LDPE) | 1"–8" |
| Duct Spacers | Hold conduit in alignment during trenching and backfill | High-impact polymer / ABS resin | 1"–8" duct, 1.5"–3" separation |
| Caps | Close conduit ends; riser caps add a rope-tie loop for mule tape | High-impact PVC | ½"–6" |
FAQ
Frequently asked questions
- What is a temporary conduit plug used for?
- A temporary conduit plug snaps into an open conduit, duct, or innerduct to keep out water, dirt, debris, and animals while the run sits exposed before cable is pulled. It installs and removes by hand, so the same plug can seal and re-open a conduit as the job requires.
- What are conduit plugs made of?
- Innovative Plastics temporary plugs are molded from low-density polyethylene (LDPE), which stays flexible and holds its shape across a wide temperature range. The tapered, ribbed side walls create a secure friction fit.
- What sizes do temporary plugs come in?
- Temporary plugs are stocked in trade sizes from 1" to 8" and sold by the case. See the size and part-number table on the Temporary Plugs product page for case quantities.
Guides & resources
- How to Size a Temporary Conduit Plug How to choose the right size temporary plug for conduit and innerduct — match the plug to the duct's trade size so it seals the opening before cable is pulled.
- Temporary vs. Permanent Conduit Plugs: Which Do You Need? The difference between a temporary conduit plug and a permanent duct seal — when a reusable snap-in plug is right, and when a job calls for a permanent sealing method instead.
- A Made-in-USA Alternative to JackMoon Duct Plugs Innovative Plastics LDPE temporary conduit plugs are an American-made alternative to JackMoon-style duct plugs — snap-in seal with a built-in pull-rope tie, trade sizes 1"–8", sold by the case.
Need specs, samples, or a distributor?
Add sizes to a quote request, or contact our sales team for volume and distributor pricing.