Type 3 mastic is a two-component mastic based on unsaturated polyester resin, which is designed and produced in order to fill the pores and correct the surface and lacing of building stones but sometimes it is used for sculpture and some decorative activities. These mastics are offered in 3 degrees of viscosity (low-LV viscosity), medium (MV) and high (HV) and with dry speed, A0, A1 and A2 .