FC-13.6-M
Engine Degreaser — Heavy Duty
Ingredients
| Ingredient | % w/w | Function |
|---|---|---|
| Deionized water | qs to 100.0 | Diluent |
| Nonionic surfactant (C10 alcohol ethoxylate, 8 EO) | 11.0 | Primary degreasing agent |
| Sodium hydroxide (50%) | 5.0 | Caustic builder, saponification |
| Sodium carbonate | 3.0 | Buffer, alkalinity source |
| Diethylene glycol monobutyl ether (DGBE) | 3.8 | Solvent, grease penetration |
| Tetrasodium GLDA (47%) | 7.5 | Chelant, hard water stability |
| Sodium xylene sulfonate (SXS, 40%) | 7.0 | Hydrotrope, coupling |
| Corrosion inhibitor (sodium silicate) | 1.0 | Flash-rust protection |
| Total | 100.0 |
Formulation Notes
High-alkaline, solvent-boosted degreaser for heavy grease, oil, and carbonized soils on engine bays and underhood components.
Method: Dissolve sodium carbonate and GLDA in water. Add SXS and DGBE. Add nonionic surfactant. Add sodium hydroxide solution slowly with cooling. Add sodium silicate. Properties: pH 11.0–12.0, clear yellow liquid, water-thin viscosity . The combination of caustic (NaOH) and carbonate provides dual alkalinity: hydroxide ions saponify triglyceride greases into soap, while carbonate buffers the pH and precipitates calcium as calcium carbonate, preventing hard water interference. DGBE penetrates carbonized oil deposits that alkaline surfactants alone cannot access . Note: Avoid use on bare aluminum cylinder heads or heat exchangers at elevated temperature; caustic etches aluminum above 60 °C .