☣️ UN 3269 • CLASS 3
Polyester resin kit, liquid base material
Placard: Flammable. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
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⚠️ This page is a quick-reference aid. For real incidents: stage upwind, isolate, deny entry, request Hazmat early, and consult the current ERG + SOP/SOG.
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Quick details
UN 3269
Class: 3
Placard type: Flammable
ERG: Guide 128 (check current ERG)
Isolation: ERG 128: Isolate spill area immediate 50m in all directions; for large spill isolate 100m; evacuate downwind areas if fire threatens containers
Chemical & Response Details
| Also known as | Polyester resin kitLiquid polyester resin baseUnsaturated polyester resin liquidFiberglass resin liquid basePolyester laminating resin |
| Appearance | Clear to amber viscous liquid with a characteristic styrene-like or chemical odor. Typically contains unsaturated polyester dissolved in reactive monomers, commonly styrene. |
| Flash Point | -4°C to 32°C (25°F to 90°F) depending on styrene content |
| Boiling Point | 145°C to 165°C (293°F to 329°F) typical range for styrene component |
| Vapor Density | 3.6 (heavier than air, based on styrene vapor) |
| Water Reactivity | No significant reaction with water; insoluble but may polymerize under certain conditions |
| Extinguishing | Alcohol-resistant foam (AR-AFFF), CO2, dry chemical, water fog for cooling containers |
| PPE | ⚠️ Level B minimum during spill response; SCBA required in confined spaces or heavy vapor areas; chemical-resistant gloves and apron for liquid contact |
| Isolation | ERG 128: Isolate spill area immediate 50m in all directions; for large spill isolate 100m; evacuate downwind areas if fire threatens containers |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
- Vapors may form explosive mixtures with air.
- Vapors may travel to source of ignition and flash back.
- Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas
- Vapor explosion hazard indoors, outdoors or in sewers.
- Those substances designated with a (P) may polymerize explosively when heated or involved in a fire.
- Runoff to sewer may create fire or explosion hazard.
- Containers may explode when heated.
First actions (field-minded)
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Ventilate closed spaces before entering, but only if properly trained and equipped.
- Isolate spill or leak area for at least 50 meters (150 feet) in all directions.
- Consider initial downwind evacuation for at least 300 meters (1000 feet).
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UN 3269 — Polyester resin kit, liquid base materia HAZMAT RADIO NOTE — UN 3269
Product: Polyester resin kit, liquid base material
Class 3 / Flammable / ERG 128
PPE: Level B minimum during spill response; SCBA required in confined spaces or heavy vapor areas; chemical-resistant gloves and apron for liquid contact
ISOLATION: ERG 128: Isolate spill area immediate 50m in all directions; for large spill isolate 100m; evacuate downwind areas if fire threatens containers
ACTION: Stage upwind · Isolate · Deny entry · Request HazmatRADIO
Use for: Quick radio or face-to-face size-up. Short, structured, field-ready.
=== IC HAZMAT BRIEFING ===
UN 3269 — Polyester resin kit, liquid base material
Class: 3 | Placard: Flammable | ERG Guide: 128
Appearance: Clear to amber viscous liquid with a characteristic styrene-like or chemical odor. Typically contains unsaturated polyester dissolved in reactive monomers, commonly styrene.
Water Reactivity: No significant reaction with water; insoluble but may polymerize under certain conditions
Extinguishing: Alcohol-resistant foam (AR-AFFF), CO2, dry chemical, water fog for cooling containers
PPE: Level B minimum during spill response; SCBA required in confined spaces or heavy vapor areas; chemical-resistant gloves and apron for liquid contact
Isolation: ERG 128: Isolate spill area immediate 50m in all directions; for large spill isolate 100m; evacuate downwind areas if fire threatens containers
— Key Hazards —
• HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
• Vapors may form explosive mixtures with air.
• Vapors may travel to source of ignition and flash back.
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• Keep unauthorized personnel away.
• Stay upwind, uphill and/or upstream.
• Ventilate closed spaces before entering, but only if properly trained and equipped.
SOURCE: allfirefighter.com/hazmat/un/3269 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3269 Polyester resin kit, liquid base material Cls3 ERG128 | allfirefighter.com/hazmat/un/3269SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS. Includes link to full page.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions. Page: https://allfirefighter.com/hazmat/un/3269
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FAQ
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas Vapor explosion hazard indoors, outdoors or in sewers. Those substances designated with a (P) may polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated.
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Keep unauthorized personnel away. Stay upwind, uphill and/or upstream.
Level B minimum during spill response; SCBA required in confined spaces or heavy vapor areas; chemical-resistant gloves and apron for liquid contact
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 128 and your department SOP/SOG for incident-specific protective actions.
Sources (high level): DOT/PHMSA marking & class concepts + ERG usage principles. This page does not reproduce ERG guide text—always consult the current ERG for incident-specific protective actions.