FAST (putty for car) is a compound made of unsaturated polyester resin dissolved in styrene and pre-accelerated by using tertiary aromatic amines.
The polymerization is catalysed with hardener (white or red paste) containing benzoyl peroxide.
The preparation is elastic and has a high damping power and is thus particularly impact resistant. Thanks to its chemical and physical properties, it can be easily applied, spread and sanded, it is flexible and has a good finish. It maintains its thickness. Moreover, the product is stable over time.