DIY refractory from soil paper and sodium silicate This post describes dirt cheap DIY refractories made with paper, soil and sodium silicate. They can form tough refractory materials from loamy soils with very little clay content. The paper makes molding easy and aids rapid even drying and reduced cracking. In … Continue reading DIY refractory from soil paper and sodium silicate- “Dirt-cheap & born in fire to survive in fire”Read More →