Reference Data
Chemical Resistance Chart
Ratings for FRP grating resin systems at ambient temperature, based on published industry retention data. A = suitable for continuous contact, B = suitable for splash and fume, C = consult us, D = not recommended.
| Chemical | Concentration | Ortho polyester | ISO polyester | Vinyl ester | Phenolic |
|---|---|---|---|---|---|
| Sulfuric acid | 10% | B | B | A | A |
| Sulfuric acid | 50% | C | C | B | A |
| Hydrochloric acid | 10% | B | B | A | A |
| Nitric acid | 10% | C | B | B | B |
| Phosphoric acid | 25% | B | A | A | A |
| Sodium hydroxide | 10% | C | B | A | B |
| Sodium hydroxide | 50% | D | C | B | C |
| Sodium hypochlorite | 5% | C | B | A | B |
| Hydrogen sulfide (gas) | saturated | B | A | A | A |
| Seawater | — | B | A | A | A |
| Ferric chloride | 15% | B | A | A | A |
| Domestic sewage | — | B | A | A | A |
| Crude oil | — | B | A | A | A |
| Gasoline | — | B | B | A | A |
| Toluene | — | D | C | B | B |
| Methanol | — | C | C | B | B |
Ambient temperature (approx. 20–25 °C). Ratings degrade with rising temperature — tell us the media, concentration and temperature and we will confirm the resin system in writing before you order. This chart is a selection aid, not a substitute for project-specific confirmation.