Tempered glass, laminated glass, insulated glass.
Rice hulls (or rice husks) are the hard protecting coverings of grains of rice. In addition to protecting rice during the growing season, rice hulls can be put to use as building material, fertilizer, insulation material, or fuel. - Ground Rice Husk -Briquette Rice Husk -Pellets
Crushed stone, aggregate, cement, radiant heat insulator.
