8" Plastic Fender Brush - Tampafil

What is tampafil, as opposed to Tampico? Is tampafil a type of plastic?

Tampico is a natural bristle which will become softer once wet. 
The Poly bristles are a little more firm and will not change once wet.

Is there a situation where you would use a Tampico brush only and not use a Tampafil brush? Thank you.

The tampico vs tampfil debate is really up to preference and application. Both of these brushes are considered 'soft bristle brushes' and can be used in a wide variety of applications. The tampafil brushes are synthetic and dry much more quickly, but may also be slightly more abrsavie. Tampico is a natural and very soft bristle and will retain more water, taking much longer to dry. I hope this helps!