Hydracast Foam
Hydracast Foam is a ready-to-use refractory investment for casting permanent pattern foundry moulds. This product was developed to produced moulds used to cast aluminium alloys due to its high dimensional accuracy excellent surface finish and high permeability, and is widely used in shoe sole and tyre mould production, and for prototyping applications.
Refractory Investment
38;12;21;39;18;40;
| Chamotte |
| Al2O3 content (%) |
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Open porosity (%) |
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| Vitreous phase (%) |
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Pyroscopic resistance (°C) |
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| Apparent density |
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| Plaster |
| Chemical composition |
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Linear expansion (%) |
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| Chemical name |
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Colorimeter L (L* value) |
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| Plaster to water mix ratio (by weight) |
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Colorimeter a (a* value) |
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| Plaster to water ratio (by weight) |
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Colorimeter b (b* value) |
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| Water to plaster ratio (by weight) |
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Colour |
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| Fluidity / spread (cm) |
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Sieve analysis (Mesh size & % weight retained) |
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| Initial setting time (minutes) |
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Bulk density loose (kg / m³) |
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| Final setting time (minutes) |
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Bulk density compacted (kg / m³) |
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| Wet compressive strength MPa |
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Apparent bulk density (g/cm³) |
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| Dry compressive strength MPa |
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Pore volume (%) |
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| Flexural strength MPa |
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Start of warming phase (minutes) |
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| Brinell hardness MPa |
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End of warming phase (minutes) |
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| Hardness shore D |
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Shelf life (Months) |
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| Refractory Investments |
| Water used (%) |
90 |
Liquid Density |
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| Mixing Time (minutes) |
3 |
Linear Expansion 1 hour after setting (%) |
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| Working / Casting Time (minutes) |
4 |
Linear Expansion 2 hours after setting (%) |
<0.08 |
| Initial Setting Time (minutes) |
5 - 11 |
Shelf Life (months) |
6 |
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| Gypsum |
| Chemical composition |
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pH |
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| Chemical name |
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Solubility of Gypsum (g/ litre) |
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| Minimum Gypsum purity (%) |
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Bulk density loose(kg/cm³) |
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| Sieve analysis (mesh size & % weight retained) |
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Bulk density compacted (kg/cm³) |
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| Colorimeter L (L* value) |
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Apparent bulk density |
[] |
| Colorimeter a (a* value) |
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Gypsum hardness (MOH scale) |
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| Colorimeter b (b* value) |
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Shelf life |
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| Colour |
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Please refer to product data sheets for futher information