sealant
Sand Sandpaper
Some examples of materials that start with the letter "s" include steel, silk, silver, and stone.
Saxony is a woolen fabric. It begins with the letter s.
granite.hard material
Insulation is a building material that starts with I.
Irish linen
burlap
Taffeta
It starts with molten material [magma], when volcanic activity starts the molten material turns into igneous rock.
Insulation is a building material. It begins with the letter i.
Granite.