Basalt

Swicofil, your expert partner for Basalt fibers and rovings.

Basalt is a dark gray to black, medium grained dense volcanic rock, thus mineral, and 100% inorganic. The typical diameter of the basalt fiber lies between 9 and 13 microns, which guarantees the best possible compromise between stability and durability.

Basalt consists of the following:

• 50 - 58 % SiO₂ 
• 14 - 18 % Al₂O₃ 
• 5 - 10 % CaO
• 4 - 9 % MgO
• 5 - 10 % Fe₂O₃  
• 2 - 5 % Na₂O
• 0.8 - 3 % K₂O
• 5 - 10 % Fe₂O₃ 
• up to 2% other minerals