Alcohol Based Alumino-Silicate Coatings
A rapid ignition-dry, spirit-based refractory coating enriched with active iron oxide — formulated to buffer thermal expansion shock, completely suppress veining and finning defects, and safeguard intricate cores without oven heating.
Rapid Torch-Dry Anti-Veining Technology for Foundries
Alcohol-based Alumino-Silicate coatings are specialized spirit-formulated refractory washes combining high-purity aluminium silicate ($\text{Al}_2\text{O}_3 \cdot \text{SiO}_2$) with active red iron oxide ($\text{Fe}_2\text{O}_3$) in an isopropyl alcohol (IPA) or denatured spirit carrier. Designed for foundries looking to eliminate time-consuming oven baking cycles, this coating allows immediate torch ignition (burn-off) after dipping, flow-coating, spraying, or brushing, producing a dry, robust refractory shell in seconds.
During pouring, high-temperature liquid metal creates steep thermal gradients that cause silica sand grains to expand abruptly, cracking core surfaces and producing extensive metal veining (finning). The engineered alumino-silicate mineral framework provides thermal cushioning to absorb expansion stresses, while the fine iron oxide phase acts as a glaze flux to seal micro-fissures against molten metal penetration. Furthermore, its unique porous matrix maintains high gas permeability, allowing binder gases to evacuate smoothly without creating pinhole or blowhole defects.
At BR Chemicals, our alcohol-based alumino-silicate coatings are formulated with premium rheological suspension agents that prevent hard settling, ensure smooth suspension upon light stirring, and deliver a clean, peel-away finish at shakeout.
Built for High-Speed Core Shops & Heavy Iron Castings
A proven spirit refractory wash chosen across India to eliminate core oven bottlenecks and reduce fettling cycle times.
Zero Oven Drying
Flashes off rapidly upon torch flame ignition, eliminating energy-intensive core baking ovens and enabling instant mould assembly.
Maximum Anti-Veining
Thermal insulating characteristics moderate the heat transfer to the sand core, preventing silica thermal fracture and finning.
High Gas Permeability
Engineered micro-porosity lets binder decomposition gases escape freely without building backpressure or causing pinholes.
Effortless Shakeout
Enriched iron oxide content promotes rapid release and clean peel-off during shakeout, drastically cutting shot blasting costs.
Foundry Applications
- ✓ Internal cores for automotive Grey Cast Iron (CI) and SG (Ductile) iron castings
- ✓ Complex hydraulic valve bodies, pump housings, cylinder blocks, and manifolds
- ✓ Cold Box (PUCB), Furan No-Bake, and Phenolic resin bonded sand cores
- ✓ Sodium Silicate / $\text{CO}_2$ mould and core assemblies where water washes soften the binder
- ✓ Heavy-section casting zones prone to sand burn-on, finning, and metal erosion
- ✓ Flexible shop-floor application by dipping, swabbing, brushing, or air-assisted spraying
Specialized Alcohol Alumino-Silicate Coating Grades
Ready-to-Use Spirit Wash
Pre-adjusted thixotropic spirit slurry formulated for direct dipping, brushing, and flow application on complex cold-box cores.
Baumé Density: 30 – 40° Bé
Viscosity: 15 – 20 sec (B4 Cup)
Colour: Reddish-Brown
High Solids Concentrated Slurry
High-density formulation designed to be diluted at the foundry using 30% to 40% spirit thinner to match exact core shop parameters.
Dilution: 30% – 40% with IPA / Thinner
Viscosity (Diluted): 15 – 20 sec (B4 Cup)
Colour: Deep Reddish-Brown
Dry Refractory Pre-Mix
Economical dry powder formulation designed to be blended on-site with industrial alcohol or spirit thinner, cutting long-distance freight costs.
Additives: Processed active iron oxide
Shelf Life: 12 months dry storage
Logistics: Highly cost-effective shipping
Technical Specifications
| Property / Parameter | Specification / Typical Value |
|---|---|
| Refractory Mineral | Processed Alumino-Silicate ($\text{Al}_2\text{O}_3 \cdot \text{SiO}_2$) enriched with active Iron Oxide ($\text{Fe}_2\text{O}_3$) |
| Carrier Medium | Isopropyl Alcohol (IPA) / Denatured Industrial Spirit |
| Visual Colour | Reddish-Brown Liquid / Slurry |
| Physical State | Ready-to-Use Liquid / Concentrated Slurry / Dry Powder |
| Active Solid Content | 50% to 55% (Ready Mix) | 60% to 65% (Concentrate) |
| Baumé Density (at 25°C) | 30° to 40° Bé |
| Flow Viscosity (B4 Cup at 25°C) | 15 to 20 seconds (Application consistency) |
| Dilution Ratio | 30% to 40% with BR Chemicals Spirit Thinner or pure IPA |
| Drying / Curing Method | Torch Flame Ignition / Burn-off or self-drying in ventilated room |
| Standard Packaging | 50 kg Wide-Mouth HDPE Carboys / Drums & 30 kg Bags (Powder) |
| Shelf Life & Storage | 6 months from manufacturing date in closed original containers. Keep away from sparks, open flames, and heat in a well-ventilated dry area. |
*Values vary according to the specific grade (Ready Mix / Slurry / Powder) and shop dilution levels. Contact our technical support team for customized grade selection and TDS.
Eliminate Veining & Cut Fettling Costs Today
Connect with BR Chemicals foundry engineers to evaluate the optimal alcohol-based alumino-silicate grade, Baumé control parameters, and test samples for your core shop. Formulations and technical datasheets provided within 24 hours.
