Technical documents

How to read a resin technical data sheet

A technical data sheet (TDS) states the supply properties you specify and buy a grade against. This page explains how to read those figures, then shows, for every Samrat Poly Resins grade, which of the four most-used properties its sheet publishes and under what condition. Every figure is read from the same product record as the product pages and sheets, so it matches them. Definitions are in the resin glossary, and every sheet is listed on the technical documents page.

51 products
50 with a technical data sheet
1 with a product data sheet
23 with a safety data sheet

Six things to check on any resin TDS

The test condition beside the number
Viscosity and gel time both change with temperature, so a figure means most when it states the condition it was measured at. 23 of the 41 resin sheets below state a temperature with their viscosity (for example “at 25 °C”); the others publish the figure alone. Compare two grades only on figures measured the same way, and where a sheet gives no condition, ask for it before you compare.
Typical values, not guarantees
The values in a TDS and on the product pages are typical values, not guaranteed specifications, and properties can vary between batches within normal manufacturing tolerances (see the website terms). For the 18 catalogue grades, the figures are the typical values printed in the 2026 product catalogue. A quotation, order confirmation or data sheet issued for a product takes precedence over anything on the website.
Ranges and single values
Some sheets publish a range (for example 350–450 cPs) and some a single figure (for example 400 cPs). A single figure is still a typical value, not a tolerance: ask what spread to expect if your process is sensitive to it.
Gel time is a reference, not your working time
A published gel time holds for the sheet’s reference conditions — the catalyst and accelerator dosage and the temperature it states, where it states them. Your own working time depends on the dosage you use, the shop and mould temperature and the batch size, so confirm it with a small trial before production. The gel time guideexplains why.
Accelerated or not
Where a sheet states the curing system, “non-accelerated” means you add the accelerator yourself as well as the catalyst; a pre-accelerated resin already contains it. Read the curing system before you plan dosing — it changes what you need to order with the resin.
What is not on the sheet
A supply TDS describes the liquid resin. Most of the sheets below do not publish finished-laminate properties such as strength or heat resistance, and none of this page’s figures is a certification, approval or suitability statement for a particular end use. If your component needs a property or an approval that the sheet does not state, ask for the evidence for the exact grade before you order — do not infer it from a similar grade.

How often each property is published

Across all 51 products:

Viscosity: published by 41 of 51 products
Gel time: published by 37 of 51 products
Styrene content: published by 36 of 51 products
Specific gravity: published by 29 of 51 products

By grade

What each grade’s sheet publishes

Figures exactly as published for each grade. A dash means the property is not published for that grade — not that it is zero or unknown to us. Open the sheet for the full set of properties, dosages and the storage and shelf-life statements.

GP Resins

Grade	Viscosity	Gel time	Styrene content	Specific gravity	Sheets
Unsaturated Polyester Resin	350–450 cPs	< 8 minutes	33–40%	—	TDS SDS
Lamination Resin (LR Resin)	400 cPs	5 Minutes	35%	—	TDS SDS
GP Clear Resin	350–450 cPs	< 8 minutes	33–40%	—	TDS SDS
GP White Resin¹	350–450 cPs	< 8 minutes	33–40%	—	TDS SDS
GP Quartz Resin	400–800 cPs	7–10 minutes	35–40%	—	TDS SDS
Button Grade Resin	1,100 cPs	9.5 Minutes	33%	—	TDS SDS
GP Yellow Resin	450–600 cPs @ 25°C	10–15 minutes	34–38%	1.10–1.14 g/cm³	TDS SDS
SPR 201 CC Clear Casting ResinSPR 201 CC	350–450 cPs	Under 8 minutes	33–40%	—	TDS
Orthophthalic Cooling Tower Grade ResinSPR 201 CTG	350–450 cPs	Under 8 minutes	33–40%	—	TDS

ISO Resins

Grade	Viscosity	Gel time	Styrene content	Specific gravity	Sheets
ISO Polyester Resin	500 cPs (mPa·s) at 25 °C	15 minutes at 25 °C	40% by weight	1.12 g/cm³ at 25 °C	TDS
Oil Storage Tank Grade ResinSPR 301 OT	300–600 cPs at 25 °C	15–35 minutes at 25 °C	33–45% by weight	1.04–1.14	TDS
Organic Solvent-Resistant Grade ResinSPR 301 OS	200–400 cPs at 25 °C	15–35 minutes at 25 °C	35–50% by weight	1.03–1.15	TDS
Rock Bolt Grade ResinSPR 301 RB	2,000–3,500 cPs	Ultra-fast grades 15 seconds–2 minutes · delayed grades 5–30+ minutes	35–39% by weight	Approximately 1.12	TDS
Filament Winding Grade ResinSPR 301 FW	200–400 cPs at 25 °C	20–60+ minutes at 25 °C	35–45% by weight	1.04–1.14	TDS
Isophthalic Cooling Tower Grade ResinSPR 301 CT	400–650 cPs	15–35 minutes at 25 °C	37–45% by weight	1.10–1.15	TDS
Low-Viscosity Isophthalic ResinSPR 301 LV	80–180 cPs at 25 °C	40–90+ minutes at 25 °C	42–50% by weight	1.03–1.09	TDS

Sheet Grade Resins

Grade	Viscosity	Gel time	Styrene content	Specific gravity	Sheets
Sheet Grade Yellow Resin	280 cPs	6.5 Minutes	35%	—	TDS SDS
Roof Light Sheet Grade Resin	280 cPs	6.5 Minutes	35%	1.1 g/cm³	TDS SDS
UV Stabilized Sheet Grade Yellow Resin	280 cPs at 25 °C	6.5 minutes at 25 °C	35% by weight	1.10 g/cm³ at 25 °C	TDS
UV-Stabilized Roof Light ResinSPR 201 RL (UV)	200–400 cPs	6.5–10 minutes	30–40%	—	TDS

GelCoat Resin

Grade	Viscosity	Gel time	Styrene content	Specific gravity	Sheets
GP Gelcoat Resin	11,000 cPs	8.5 Minutes	30%	—	TDS SDS
ISO Gelcoat	40,000 cPs at 25 °C	8 minutes at 25 °C	32% by weight	1.15 g/cm³ 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	17–25% by weight	1.35–1.55	TDS
Terephthalic Fire-Retardant Gelcoat ResinSPR 401 FRGC	12,000–18,000 cPs	12–22 minutes at 25 °C	28–35% by weight	—	TDS

Fire Retardant Resins

Grade	Viscosity	Gel time	Styrene content	Specific gravity	Sheets
Fire Retardant Resin	400 cPs	5.5 Minutes	35%	—	TDS SDS
ISO Fire Retardant Resin	400 cPs	5.5 minutes	35%	1.18 g/cm³	TDS SDS
Halogen-Free Fire-Retardant ResinSPR 201 FR (HF)	1,500–3,500 cPs at 25 °C	15–30 minutes at 25 °C	30–40%	1.25–1.45	TDS

Epoxy & Casting

Grade	Viscosity	Gel time	Styrene content	Specific gravity	Sheets
Clear Casting Resin	900 cPs (at 25°C)	—	—	1.10 g/cm³	TDS SDS
Epoxy Art Resin	900–1200 cPs (mixed, at 25 °C)	—	—	—	TDS SDS
Epoxy Hardener	500 cPs (at 25 °C)	—	—	0.97 g/cm³	TDS SDS
Fiberglass Epoxy Resin	700 cPs at 25°C	35-45 minutes at 25°C	—	1.15 g/cm³	TDS SDS
Bisphenol Resin	600 cPs (at 25°C)	35-45 minutes (at 25°C; TDS typical data)	Not applicable	1.10 g/cm³ (at 25°C)	TDS SDS

Industrial & Specialty Resins

Grade	Viscosity	Gel time	Styrene content	Specific gravity	Sheets
DMC/SMC Resin	600 cPs (at 25°C)	12–18 minutes (at 25°C; review current TDS for test context)	35%	1.12 g/cm³	TDS SDS
Marble Resin	450 cPs at 25 °C	15–20 minutes at 25 °C	35% (TDS)	1.12 g/cm³	TDS SDS
Vinyl Ester Resin	350 cPs (at 25°C)	15–20 minutes at 25°C (see TDS test condition)	40%	1.05 g/cm³	TDS SDS
Isophthalic SMC ResinSPR 301 SMC	800–1,400 cPs at 25 °C	12–18 minutes at 25 °C	31–36% by weight	1.10–1.14	TDS
Isophthalic DMC ResinSPR 301 DMC	800–1,400 cPs at 25 °C	12–18 minutes at 25 °C	31–36% by weight	1.10–1.14	TDS
Terephthalic SMC ResinSPR 401 SMC	800–1,500 cPs at 25 °C	12–18 minutes at 25 °C (ambient QC)	32–38% by weight	1.11–1.15	TDS
Terephthalic DMC ResinSPR 401 DMC	1,200–2,200 cPs at 25 °C	14–22 minutes at 25 °C (ambient QC)	31–36% by weight	1.11–1.15	TDS
Pultrusion Grade ResinSPR 401 PT	300–600 cPs at 25 °C	—	36–42% by weight	1.10–1.14	TDS
Tooling Grade ResinSPR 401 TL	400–650 cPs	15–30 minutes at 25 °C	35–42% by weight	1.12–1.16	TDS

Document notes

GP White Resin: GP Clear base-resin specification (SPR-TDS-GCR). Its 'Clear' describes the base resin; GP White is white pigmented, as described in the GP White SDS.

Allied products and hardeners

These sheets describe materials that are not liquid resins — reinforcement, pigment, solvents, catalysts and tools — so they publish a different set of properties. Open each sheet for its own figures.

Need a figure that is not published?

Ask rather than assume. Tell us the grade, the property and the condition you need it at, and what the component is for. How ordering works sets out what to send; the quickest routes are theenquiry form or +91 74638 81652. Read the safety data sheet before anyone handles the material.