Inlays and onlays are cemented in the mouth using adhesive resin luting cements. Factories like Hetauda Cement Factory, Riddi Siddi Cements, Asian Paints, Yeti Paints industries etc. Materials may include calcium aluminate cements, fire clay, ganister and minerals high in aluminum. The hydration reactions of calcium aluminate cements are very complex. Andhra Cements (1937) was the first cement factory in Andhra Pradesh. In the case of silica cements, the process is called lithification. The French company Vicat still currently produce natural cements and lime mortars. The plaster cements these hearths in place, preserving them for thousands of years. Crown tractors are quite effective in removing crowns luted with temporary cements. It is a primary ingredient in some solvent cements. This is made possible by the ever-increasing new formulations of glass ionomer cements. The insurance behemoth also trimmed holdings in Ambuja Cements, Cipla, TCS, Lupin and Asian Paints. Charis cements permanent ties with Siddarmark and begins a rapprochement with Dohlar. They are similar to pozzolan lime cements in their properties. Used as an economic alternative to Portland sulfate-resisting and low-heat cements.