Quick facts
- Published family
- Unsaturated polyester
- Published FR type
- Halogenated fire-retardant formulation
- Supplied form
- White liquid
- Selection rule
- Verify the finished-component requirement before specifying
A specialist product role within the UPR family
Unsaturated Polyester Resin is the broader family. Samrat Poly Resins, India's Fire Retardant Resin is a published specialist halogenated unsaturated polyester grade within that broader family, intended for an industrial FRP discussion where fire-performance criteria are stated.
This does not make FR Resin unrelated to polyester resin, and it does not make every polyester resin an FR grade. Product names, technical data and the finished-component requirement must stay connected.
What the current product data actually identifies
SPR-TDS-FRR Rev. 01 identifies a white liquid resin with 400 cPs viscosity, 5.5-minute gel time, 35% styrene content, three-month shelf life, 30–35 °C storage. These are current product-data points for the listed grade.
The TDS contains a manufacturer-published fire-performance statement with a note that its test-report or certification reference is to be supplied and confirmed. This guide therefore does not turn that statement into a verified rating or finished-system approval.
Define the requirement before choosing the grade
Start with the finished FRP part, the original project wording and any required standard or classification. Then identify the product role, reinforcement context, expected quantity and delivery location.
If the application has no stated fire-performance requirement, a general-purpose product route may be more relevant. If it does, use the current Fire Retardant Resin TDS and a focused enquiry instead of assuming a broad UPR figure applies.
Frequently asked questions
Is Fire Retardant Resin an unsaturated polyester resin?
Yes. The current Fire Retardant Resin TDS identifies the base resin as unsaturated polyester and the FR type as a halogenated fire-retardant formulation.
Is FR Resin a finished FRP fire classification?
No. FR Resin identifies a specialist product role. A finished FRP requirement must be evaluated against the actual system, required standard or classification and supporting documentation.