Gelcoat
Terephthalic Fire-Retardant Gelcoat Resin
A Samrat Poly Resins, India grade, SPR 401 FRGC. Enquire with Samrat FRP Traders for supply, pricing and packaging in Nepal.
Price
PRICE ON REQUEST
Terephthalic Fire-Retardant Gelcoat Resin pricing varies based on:
- Order Quantity
- Product / Resin Grade
- Current Raw Material Rates
Technical documents
Download Technical Data SheetPDFFull product rangeProduct catalogue · PDF, 16 pagesBrowse the document libraryDocuments issued by: Samrat Poly Resins, India
Thixotropic terephthalic fire-retardant gelcoat with strong mechanical properties, for the mould-face surface of fire-retardant FRP components.
Catalogue codeSPR 401 FRGC
Terephthalic fire-retardant gelcoat
Resin chemistryTerephthalic Polyester Resins (SPR 401)
- Manufacturer
- Samrat Poly Resins, Doraha, India
- Nepal supplier and importer
- Samrat FRP Traders
- Technical information issued by
- Samrat Poly Resins (2026 catalogue)
- Price, packaging, lead time in Nepal
- Confirmed on enquiry
About this product
SPR 401 FRGC is the terephthalic fire-retardant gelcoat. The supplier describes a thixotropic fire-retardant gelcoat with excellent mechanical properties, for the mould-face surface of fire-retardant FRP components.
It is listed for fire-retardant gelcoat surfaces on rail and transport composite components, automotive composite components and fire-retardant moulded FRP parts, in white, grey or a custom colour. The orthophthalic fire-retardant gelcoat, SPR 201 FR-GC, is the other option.
Samrat FRP Traders handles enquiries for this Samrat Poly Resins, India grade in Nepal. Pricing, packaging and availability are confirmed on enquiry.
What this means for buyers
Pair it with the laminate
The catalogue’s selection guide pairs a fire-retardant gelcoat with the fire-retardant laminating resin of the same project.
Colour by enquiry
The catalogue lists white, grey or custom colour. State the colour you need when you enquire.
Key features
- Thixotropic terephthalic fire-retardant gelcoat
- White, grey or custom colour
- Supplied non-accelerated
Typical specification
- Appearance
- Opaque, thick pigmented liquid
- Colour
- White, grey or custom colour
- Viscosity — 2 rpm
- 12,000–18,000 cPs
- Viscosity — 20 rpm
- 2,000–3,500 cPs
- Thixotropic index
- 4.5–6.0
- Gel time
- 12–22 minutes at 25 °C
- Density
- 1.25–1.45 g/cm³
- Styrene content
- 28–35% by weight
- Supply condition
- Non-accelerated · thixotropic
- Reference cure system
- MEKP 1.5% + Cobalt Octoate 0.4% — added separately during use
Source: Samrat Poly Resins, India — product catalogue, 2026 edition (typical specification)
How to read these values
- These are typical values from the supplier’s product catalogue. They describe the grade; they are not batch guarantees or acceptance limits.
- A gelcoat is the mould-face surface layer of an FRP part. It is applied to the mould before lay-up and is not a laminating resin.
- A fire-retardant formulation does not by itself establish a certified fire rating. The finished laminate has to be tested to the standard your project requires.
- Resin data does not guarantee the performance of a finished FRP component. Confirm suitability with a trial on your own process, reinforcement and cure conditions.
Applications and processes
Uses listed in the supplier’s catalogue.
- Fire-retardant gelcoat surfaces for rail and transport composite components
- Automotive composite components
- Fire-retardant moulded FRP parts
Limitations
- A gelcoat is one layer of a part and carries no fire rating on its own. Its viscosities are measured at 2 and 20 rpm, so they do not compare directly with figures measured under other conditions.
- The values shown are typical catalogue values for the grade, not batch guarantees, acceptance limits or a Technical Data Sheet. Confirm the current data before relying on a figure.
- Resin data does not describe a finished part. Strength, durability, fire behaviour and chemical resistance of a part depend on its design, reinforcement, process, cure and testing.
When to consider a different resin
These grades are made for a different situation. Match them against your own service conditions.
- Orthophthalic Fire-Retardant Gelcoat Resin (SPR 201 FR-GC)A fire-retardant mould-face surface paired with an orthophthalic fire-retardant laminate.
Comparison table
| Criterion | Terephthalic Fire-Retardant Gelcoat Resin (SPR 401 FRGC) | Orthophthalic Fire-Retardant Gelcoat Resin (SPR 201 FR-GC) |
|---|---|---|
| Chemistry | Terephthalic unsaturated polyester | Orthophthalic unsaturated polyester |
| Supply condition | Non-accelerated · thixotropic | Non-accelerated · thixotropic |
| Viscosity | 12,000–18,000 cPs (viscosity — 2 rpm) | 5,000–11,000 cPs at 25 °C (viscosity — high shear) |
| Gel time | 12–22 minutes at 25 °C | 9–16 minutes at 25 °C |
| Cure system | MEKP 1.5% + Cobalt Octoate 0.4% — added separately during use | MEKP 1.5–2.0% — added during use |
| Listed uses | Fire-retardant gelcoat surfaces for rail and transport composite components; Automotive composite components; Fire-retardant moulded FRP parts | Rail and metro composite components; Automotive FRP components; Surface gelcoat for fire-retardant FRP laminates |
| Choose when | A fire-retardant mould-face surface on terephthalic chemistry, in white, grey or custom colour. | A fire-retardant mould-face surface paired with an orthophthalic fire-retardant laminate. |
Sources: the 2026 product catalogue of Samrat Poly Resins, India for the catalogue grades, and each earlier product’s published Technical Data Sheet summary. Values are typical and were measured under the conditions each source states, so they are a guide to selection, not batch guarantees. Viscosities measured at different spindle speeds or shear conditions are not directly comparable.
Manufacturing and quality context
Samrat Poly Resins manufactures the grade in Doraha, Punjab, India. Its 2026 catalogue presents every grade under its resin chemistry and code and describes a quality inspection laboratory at Doraha. Batch-specific questions, gel-time or viscosity queries and clarification of catalogue values are answered by the manufacturer’s technical team.
The catalogue recommends a trial on the customer’s own process and reinforcement before commercial use: typical values are not a substitute for a trial. Technical and safety data sheets are issued grade by grade: this grade’s Technical Data Sheet is published on this page, and a Safety Data Sheet has not been issued for it here. Ask for the current revision before relying on a document.
Samrat FRP Traders supplies and imports the grade for Nepal and handles enquiries. It does not manufacture, reformulate or certify resins.
Related process guides
These guides are written for another grade. They explain the process; they do not approve this grade for it.
Handling and safety
- Use suitable personal protective equipment and adequate ventilation.
- Store resin, initiators and accelerators separately, in original sealed containers, cool, shaded and away from heat and ignition sources.
- Add the initiator and the accelerator to the resin separately, according to the confirmed process.
- Never mix a concentrated peroxide initiator directly with a cobalt accelerator.
Product details
Applications
Product comparisons
Frequently asked questions
Is this a laminating resin?
No. It is a gelcoat, applied to the mould before lay-up to form the part’s surface.
Does it make the part fire-rated?
Not by itself. A fire rating belongs to the finished, tested part.
Is a technical or safety data sheet available?
Yes. The supplier’s Technical Data Sheet for this grade is published on this page — Doc. Ref SPR-TDS-TFG, Rev. 01, September 2026, issued by Samrat Poly Resins, India. No Safety Data Sheet has been issued for this grade on this site; ask us and we will request the current one.
Is it thixotropic?
Yes. The catalogue lists it as non-accelerated and thixotropic, with a thixotropic index of 4.5–6.0.
What should it be paired with?
The catalogue’s guidance is to pair a fire-retardant gelcoat with the fire-retardant laminating resin of the same project.
Knowledge hub
A fuller explanation of this grade’s chemistry, values and limits.
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