Safety
If you are experimenting.
Briefly-you should avoid breathing the atmosphere where tetra ethyl silicate is burning.
The
silicon part will probably be burning to form Silicon dioxide. Asbestos is also
silicon dioxide. Asbestos is dangerous because of the size of particles so I
believe that these smoke sized particles will not be dangerous.
Until
this is properly researched, don’t breathe the atmosphere where your blow lamp
is burning. This is why I burn in the garden shed and observe through the window
from outside.