Oil Storage Tank Grade Resin
SPR 301 OTIsophthalic polyester resin for oil-storage-tank liningsSPR 301 · Isophthalic Polyester Resins
Isophthalic grade with good electrical and heat-resistance properties, for the FRP lining of oil storage tanks.
Review the official product data sheet for specifications and application information.
Price
Price on Request
Industrial resin pricing varies based on:
- Order Quantity
- Resin Grade
- Current Raw Material Rates
Product details
| Catalogue Code | SPR 301 OT |
|---|---|
| Resin Chemistry | Isophthalic unsaturated polyester |
| Supply Condition | Non-accelerated |
| Reference Cure System | MEKP 1.5% + Cobalt Octoate 0.4% — added separately during use |
Typical specification
| Appearance | Clear, pale-yellow to light-amber liquid |
|---|---|
| Viscosity | 300–600 cPs at 25 °C |
| Gel Time | 15–35 minutes at 25 °C |
| Specific Gravity | 1.04–1.14 |
| Styrene Content | 33–45% by weight |
Typical values from the Samrat Poly Resins product catalogue, 2026 edition. They are not guaranteed specifications or finished-component properties; confirm the current values for your order and trial the grade on your own process.
SPR 301 OT is an isophthalic polyester grade from the SPR 301 family with good electrical and heat-resistance properties, listed for the FRP lining of oil-storage tanks and for chemical-equipment manufacturing. It is supplied non-accelerated and cured with MEKP and cobalt octoate added separately during use.
For linings that store organic solvents rather than oil, the catalogue lists SPR 301 OS. The general isophthalic grade for water and chemical service is ISO Polyester Resin (SPR 301).
Key features
- Isophthalic grade for oil-storage-tank linings (SPR 301 OT)
- Good electrical and heat-resistance properties, per the catalogue
- Typical viscosity 300–600 cPs and gel time 15–35 minutes at 25 °C
- Supplied non-accelerated; MEKP and cobalt octoate added during use
Applications
- FRP lining for oil-storage tanks
- Chemical-equipment manufacturing
Product role
A tank lining is judged by the stored medium, its temperature and how long the laminate stays in contact with it. The catalogue lists SPR 301 OT specifically for oil-storage-tank lining and chemical equipment, within the isophthalic family that is specified where a laminate faces chemical service.
Chemical-resistance wording is not a compatibility chart. Share the stored product, its temperature, the lining construction and any governing specification so suitability can be reviewed for that service.
Supply and cure
- Supply condition
- Non-accelerated
- Reference cure system
- MEKP 1.5% + Cobalt Octoate 0.4% — added separately during use
Processes and where this grade fits
SPR 301 OT is an isophthalic laminating grade listed for tank linings and chemical equipment. The lining is the layer in contact with the stored product.
| Process or use | Role of this grade | What to confirm |
|---|---|---|
| Hand lay-up of FRP linings in oil-storage tanks | Listed role | The stored oil, its temperature and the lining construction |
| Contact-moulded chemical equipment | Listed role — chemical-equipment manufacturing | The process medium, concentration and temperature, and the governing design standard |
| Linings for organic-solvent storage | Consider SPR 301 OS | The catalogue lists the organic solvent-resistant grade for solvent storage |
| More aggressive corrosive service | Consider vinyl ester | SPR 501 VE, Vinyl Ester Resin |
| Structural FRP tank shells for water | Not the listed role | General isophthalic or orthophthalic tank resins, depending on service |
Process-selection considerations
- Name the stored product precisely — crude, diesel, lubricating oil, used oil — and its temperature. "Oil" covers very different chemistry.
- Describe the lining construction: surface veil, resin-rich layer and back-up laminate, and the substrate it is applied to.
- Share any governing specification for the tank or equipment. Where a design standard applies, its requirements govern the finished construction.
- Plan work to the typical gel time of 15–35 minutes at 25 °C at the reference cure, MEKP 1.5% with cobalt octoate 0.4% added separately.
- Consider inspection and repair access: a lining that cannot be inspected needs more conservative selection.
Limitations and trial requirements
- The catalogue lists oil-storage-tank lining and chemical equipment, but it does not publish a chemical-resistance chart or a maximum service temperature for SPR 301 OT.
- Isophthalic chemistry improves resistance relative to orthophthalic grades; it is not a compatibility guarantee for a particular medium.
- Only liquid-resin typical properties are published — no cured mechanical or heat-deflection values for this grade.
- Trial the grade on the real part, mould and shop conditions before production. The catalogue values are typical liquid-resin properties, not guaranteed limits or finished-part performance.
Before you select this grade
- The values on this page are typical. Final selection should be confirmed against your own process, a trial result and the current technical documentation for the grade.
- The Technical Data Sheet linked on this page carries these same typical values. No Safety Data Sheet is published on this site for this grade; request current safety information before use.
- Never mix a concentrated peroxide initiator directly with a cobalt accelerator. Add each to the resin separately, according to the confirmed process.
- Store resin, initiators and accelerators separately, in original sealed containers, cool, shaded and away from heat and ignition sources. Use suitable personal protective equipment and adequate ventilation.
