GelCoat Resin · Orthophthalic
GP Gelcoat Resin
White, high-gloss polyester gelcoat for FRP mould surfaces.
- Viscosity
- 11,000 cPs
- Gel Time
- 8.5 Minutes
Product family
Polyester Gelcoat — General Purpose & Isophthalic
A gelcoat is the outermost layer of an FRP moulding, sprayed or brushed into the mould before any reinforcement goes in. It becomes the visible surface of the finished part and its first line of protection, which is why it is formulated differently from a laminating resin: heavily pigmented, thixotropic enough to hold on a vertical mould face, and made to cure hard and glossy against the tool. Samrat Poly Resins manufactures two published gelcoat grades at Doraha, Punjab.
A gelcoat is not a laminating resin and not a paint. The structural laminate behind it is built with a separate resin, and gelcoat applied to a finished part rather than into a mould will not behave the same way.
4Published
Products
Products
4 products
Published gelcoat grades
GelCoat Resin · Isophthalic
ISO Gelcoat
Isophthalic polyester gelcoat, the grade normally specified where an FRP surface has to hold gloss and colour through weathering and water contact.
- Viscosity
- 40,000 cPs at 25 °C
- Gel Time
- 8 minutes at 25 °C
Price on RequestTDS
Thixotropic fire-retardant gelcoat for the mould-face surface of fire-retardant FRP components.
- Viscosity
- 5,000–11,000 cPs at 25 °C
- Gel Time
- 9–16 minutes at 25 °C
Price on RequestTDS
Thixotropic terephthalic fire-retardant gelcoat for the mould-face surface of fire-retardant FRP components.
- Viscosity
- 12,000–18,000 cPs
- Gel Time
- 12–22 minutes at 25 °C
Price on RequestTDS
GelCoat Resin compared
Typical values from each grade's published data sheet, for shortlisting. They are not guaranteed properties of a finished part.
| Grade | Viscosity | Gel time | Data sheet |
|---|---|---|---|
| GP Gelcoat ResinSPR 201 GC | 11,000 cPs | 8.5 Minutes | TDS |
| ISO GelcoatSPR 301 GC | 40,000 cPs at 25 °C | 8 minutes at 25 °C | TDS |
| Orthophthalic Fire-Retardant Gelcoat ResinSPR 201 FR-GC | 5,000–11,000 cPs at 25 °C | 9–16 minutes at 25 °C | TDS |
| Terephthalic Fire-Retardant Gelcoat ResinSPR 401 FRGC | 12,000–18,000 cPs | 12–22 minutes at 25 °C | TDS |
Choosing between them
General purpose or isophthalic?
General purpose
GP Gelcoat Resin
The standard-duty route for FRP mould work: a white, high-gloss polyester gelcoat for moulded products and surface finishing where the part is not in sustained water contact or long outdoor service. Published TDS, 50 kg and 225 kg packs.
View GP Gelcoat ResinIsophthalic
ISO Gelcoat
The grade normally specified where the visible surface has to hold gloss and colour through weathering, water contact or outdoor service — marine topsides, sanitaryware, transport and exterior panels. Its data sheet publishes brush or spray application onto the mould face.
View ISO GelcoatFire-retardant
Fire-retardant gelcoats
Thixotropic fire-retardant surface coats for rail, transport and automotive components, paired with the fire-retardant laminating resin of the same project: the orthophthalic SPR 201 FR-GC and the terephthalic SPR 401 FRGC. Neither carries a certified fire rating on its own; fire classifications belong to the tested finished part.
View SPR 201 FR-GCView SPR 401 FRGCTwo limits worth knowing before you specify. No polyester gelcoat is waterproof; they are all permeable, and permeability rises with temperature, so blister resistance is a property of the whole laminate rather than the coating alone. And for a surface in continuous immersion — a pool shell or a hull bottom — industry practice steps up to an isophthalic-NPG gelcoat, which is a different grade again. If your part is permanently under water, say so in the enquiry rather than assuming an isophthalic gelcoat covers it.
By job
Application guides
Guides
Read before you specify
What is Gel Coat Resin?Understand Gelcoat Resin as the visible, mould-facing surface layer in an FRP build-up, how it differs from laminating resin and from epoxy systems, where it is used, and what to confirm before procurement.What Is ISO Gelcoat? Isophthalic Gelcoat ExplainedA gelcoat is not pigmented resin. Understand what an isophthalic gelcoat actually is, why air inhibition is deliberate, where ISO sits between orthophthalic and ISO-NPG, and what it can and cannot protect against.How to Apply ISO Gelcoat: Film Thickness, Cure and DefectsFilm thickness has a window with failure at both ends, the laminate window is a state rather than a clock time, and most gelcoat defects trace to a handful of causes. A practical process guide with a defect table.ISO Gelcoat Applications: Where Isophthalic Surfaces Are SpecifiedSanitaryware, water tanks, marine topsides, transport panels, architectural cladding and industrial enclosures. Where an isophthalic gelcoat is genuinely the right specification, what each application actually demands, and when to step up.How to Choose Gelcoat Resin for FRP ProductsA procurement guide for separating the FRP surface-finish requirement from the laminate requirement before selecting Gelcoat Resin.Gelcoat Problems: Peeling, Cracking and TackinessA practical, safety-conscious framework for documenting Gelcoat Resin peeling, cracking, pinholes, fisheyes or tackiness before a technical discussion.Gelcoat Resin Storage and Handling GuideA general guide to documenting Gelcoat Resin storage and handling conditions while following the exact product data and safety instructions.
Ordering gelcoat resin: questions buyers ask
Choose the grade, send the quantity and delivery location, and we reply with a quotation. Call +91 74638 81652, message us on WhatsApp +91 74638 81005 or email info@samratpolyresins.in.
The outermost layer of an FRP moulding, sprayed or brushed into the mould before any reinforcement goes in. It becomes the visible surface of the finished part. A gelcoat is not a laminating resin and not a paint.
GP Gelcoat Resin is the standard-duty white, high-gloss gelcoat for moulded products where the part is not in sustained water contact or long outdoor service. ISO Gelcoat is normally specified where the surface has to hold gloss and colour through weathering, water contact or outdoor service.
4 published grades: GP Gelcoat Resin, ISO Gelcoat, Orthophthalic Fire-Retardant Gelcoat Resin and Terephthalic Fire-Retardant Gelcoat Resin. Each is manufactured at Doraha, Ludhiana, Punjab.
GP Gelcoat Resin: 50 kg / 225 kg. For ISO Gelcoat, Orthophthalic Fire-Retardant Gelcoat Resin and Terephthalic Fire-Retardant Gelcoat Resin, packaging is confirmed with the quotation.
Prices are quoted on request, for your grade, monthly quantity and delivery location. Send those details on WhatsApp (+91 74638 81005), call +91 74638 81652 or email info@samratpolyresins.in. How ordering works.
Yes. GP Gelcoat Resin, ISO Gelcoat, Orthophthalic Fire-Retardant Gelcoat Resin and Terephthalic Fire-Retardant Gelcoat Resin each link a technical data sheet (PDF) with the published specification.
Yes. Supply covers Punjab, Haryana, Delhi, Uttar Pradesh, West Bengal, Bihar, Jharkhand, Odisha, Assam and Andhra Pradesh, with exports to Nepal, Bangladesh, Ethiopia, Cameroon and South Africa.
Traders and distributors can send a dealer enquiry with their firm, location and expected monthly volume on the dealer and distributor enquiries page.
Enquiry
Request a quote for gelcoat resin
Tell us the finished product, the service condition and the quantity, and the right grade can be matched to it. Samrat Poly Resins manufactures at Doraha, Punjab.