Fireproof Tape for Underground Cable Vaults And Splices
Unlike household or construction fire tape, HOT-STOP® XLN fireproof tape is engineered specifically for underground electric utility cable vaults. If you’re specifying fireproofing for cable splices or vault equipment, you need tape built to meet utility performance criteria, not a general-purpose product relabeled for the job.
HOT-STOP® XLN gives your underground cable fireproofing a proven layer of arc fault protection, backed by over 30 years of American manufacturing experience.
HOT-STOP® XLN: Non-Combustible Glass Fiber Tape
When an arc fault strikes, you have seconds to contain the damage. This non-combustible glass fiber tape contains fires where they start and shields adjacent cables. It’s constructed from continuous filament glass fiber, contains no asbestos, and applies without specialized training.
Rated for 2,000°F Flame Exposure
Tested against 2,000°F flames and sustained burns, it delivers complete protection without damaging the cables. It’s designed to meet criteria set by a major electric utility.
Fume And Toxic Gas-Free Formulation
It produces no fumes or toxic gases, so it’s safe for personnel contact during and after a fire event. Crews apply it in confined vaults.
Pyro-Guard Tape: Another Fireproof Tape Option
If your spec allows alternatives, Pyro-Guard Tape is our other fireproof tape option. It works as a high-temperature insulation tape for applications that don’t need the utility-vault arc fault rating. Here’s how they compare.
| HOT-STOP® XLN | Pyro-Guard Tape | |
|---|---|---|
| Best fit | Underground utility vaults and splices | General industrial and commercial sealing |
| Rating | 2,000°F flame exposure, non-combustible | High-temperature rated |
| Format | Rolls and custom vault bags | Rolls |
Not sure which fits your spec? Send us the requirement, and we’ll match it.
Technical Specifications
Your spec probably calls for a specific temperature rating and roll size. HOT-STOP® XLN is rated for 2,000°F flame exposure, built from non-combustible continuous filament glass fiber, and supplied in 1/16″ x 3″ x 20 ft rolls packaged 24 per carton.
Roll Sizes: 1/16" x 3" x 20 ft (24 Rolls/Carton)
Standard rolls handle typical splice wraps and full vault coverage. Order by the carton to keep your crews stocked for scheduled work and emergency repairs.
Custom Vault Bag Configurations for Fiber Optics
Protecting fiber optic vaults? We build custom vault bag configurations sized to your layout, so every entry point stays covered. Send us your vault dimensions.
Why Utilities Trust HOT-STOP® XLN
Utilities specify HOT-STOP® XLN because it has held up in real fault conditions, not because of marketing claims.
Field Performance Report (PECO Case Study)
HOT-STOP® XLN was designed to criteria set by PECO. Its field report records the tape withstanding 2,000°F flames and sustained burns.
Resistant to Fire, Chemicals, Water & Mechanical Damage
Vaults are harsh environments. This tape stands up to fire, chemicals, water, and mechanical damage, so one installation keeps protecting your critical equipment for years.
Common Applications for HOT-STOP® XLN Fireproof Tape
From utility vaults to military facilities, this tape protects anywhere cables face arc fault or fire risk. Below are the three settings engineers specify most.
Underground Electric Vaults
Use it for cable vault protection in electric utility systems, where arc faults and gas-fueled fires are common. It contains the fault at the source.
Cable Splices
Wrap splices directly to contain faults and prevent fire spread between phases. It’s the fastest way to add protection at your most vulnerable connection points.
Commercial & Military Settings
It also serves as a fire-resistant insulation tape in commercial, industrial, and military facilities. Anywhere high-heat equipment needs a durable barrier, it performs reliably.
Frequently Asked Questions
If you’re evaluating this tape against a utility spec, these answers cover the questions engineers ask most.
What makes a tape fireproof vs. flame retardant?
Flame retardant tape resists ignition or slows the spread of flames. Fireproof tape is fully non-combustible, meaning it withstands direct flame exposure without burning through.
What temperature can HOT-STOP XLN withstand?
It’s tested against 2,000°F flames and sustained burns, and it delivers complete protection with no damage to the cables inside your vault or splice points.
Is HOT-STOP XLN safe for personnel to handle without special training?
Yes. It’s easy to apply, requires no specialized training, and is fume and toxic gas free, so your crews can handle and install it safely.
What size rolls does HOT-STOP XLN come in?
Standard rolls are 1/16″ x 3″ x 20 ft, packaged 24 rolls per carton. Custom vault bag configurations are also available for your special layouts.
Ready to Protect Your Cable Vaults?
Your vaults face arc faults, chemicals, and water every day. Protect them with utility-grade fireproof tape. Send us your roll quantities or vault details, and we’ll respond quickly with pricing and lead times.