Firestop — The Stanvac Standard
SP 7:2026 — National Building Construction Standards (NBCS) · For builders · MEP consultants · Architects · CBRI certified · IS 12458:2019
Passive fire is a science of many technologies. Stanvac masters them all.
31 years of industrial chemistry · one Gurugram plant · 41 industries · trusted by Reliance, Adani, Tata Steel, SAIL and UltraTech.
Where Part F applies
From 9 metres up, and in every plant over 2,000 sq m. Every service penetration in a building like this carries its own IS 12458 report.
1
The mastery — every discipline of passive fire, under one roof
- Cementitious firestop mortar. Ablative barriers. Intumescent circuit-integrity coatings. Fire-retardant panel finishes. Four chemistries, one company.
- Each tested to the method that governs it — IS 12458:2019 furnace + mandatory hose stream for seals, IEC 60331 / 60332 for cables.
- Most brands sell one. Stanvac practises all — a Stanvac specification has no gaps.
2
The mandate — NBC 2016 withdrawn · NBCS 2026 in force w.e.f. 30 April 2026
- NBCS 2026 Part F, Clause 3.5.4.4 — every service penetration through fire-rated construction sealed: minimum 120 minutes, tested per IS 12458:2019 — including the mandatory hose stream test.
- NBC 2016 demanded the fire stop but never named the test. NBCS 2026 names it: IS 12458:2019. The certificate vacuum is closed.
- Part F says “should” — the “shall” lives in your State bye-law and your fire NOC desk. NBC 2016-based bye-laws stay in force until amended.
- The physics is unchanged: an unsealed opening turns a fire-rated wall into a chimney.
- India loses one life to electrical fire every 26 minutes. The inquiry asks one question: who specified the seal, and was it tested?
FM-71 mortar seal — cable tray through shear wall
FB-250 barrier — data-hall wall penetration
EC 43 coated cable bundle — after fire test
3
The range — every opening on your drawing, one tested system
| The opening on your drawing | The system | Seal · rating | What you get |
|---|---|---|---|
| Load-bearing floor & wall openings | FM-71 firestop mortar | 75 mm · 2 hours | The workhorse seal — strong, tested, economical |
| Cable routes opened again and again | FM-71 + FB-250 composite | 100 mm · 2 hours | Re-enter for new cables without breaking the rating |
| Occupied buildings · data halls · retrofit | FB-250 barrier system | 100 mm · 2 hours | Fast, clean, dry — no wet work near live equipment |
| The cables passing through the seal | FIREX EC 43 — flame-spread coat | beyond Part F · IEC 60332 | One foot of coating on every penetration, included free: fire cannot travel the cables through your seal |
| Critical circuits that must survive a fire | FIREX EC 43 Survival — full length | beyond Part F · 240 min · IEC 60331 | Optional upgrade — fire-pump, alarm and trip circuits stay alive 240 minutes at 750 °C |
| Thin panel wiring — the first fuel in every panel | FIREX EC 7034 first-coat | beyond Part F | Coated before it can catch. Rodents will not chew it. |
4
Why Stanvac — four reasons, each sufficient on its own
- NBCS specifies ONLY IS 12458:2019. It does NOT specify imported FM, UL or ASTM. The CBRI report is to the only specified standard — read on sight, no lost weeks before occupancy. Any other certificate needs the fire authority’s separate approval.
- One accountable partner. Survey, spec paragraph, drawings, method statements, trained applicators — one name answers for it.
- More than the mandate. Fire crosses by two routes — through the opening, and along the cable. Imported mortar closes only the first. Stanvac closes both: 2 hours at the wall + zero flame spread along the cable, spread-stop tested to 4 hours (240 min), one-foot coat included free. No barrier-only brand closes the second.
Why pay more for what NBCS does not specify?
The imported seal costs more — and its FM / UL certificate is not specified in NBCS 2026. Stanvac is certified to IS 12458:2019, the one standard NBCS specifies — at a lower price. Lower price, specified certificate. Higher price, unspecified certificate. The choice decides itself.
5
The standard — NBCS specifies IS 12458:2019. CBRI tests to it.
- CBRI is CSIR — the Government of India’s national building-fire laboratory. FIREX systems are CBRI-tested.
- An IS-tested system matches the code as written.
The method is Indian. The laboratory is national. The certificate is the one your NOC desk reads — as-is.
CBRI fire test in progress — furnace, specimen wall
Stanvac plant, Gurugram — manufacturing line
PCO — Panels · Cables · Openings · one survey · one specification · one accountable partner
STANVAC CHEMICALS (INDIA) LTD · Plot 551, Pace City-II, Sector 37, Gurugram 122001 · sales@stanvac.com · +91-85271 99811 · stanvac.com