ASTRA 24K

Two component, super transparent mastic for the gluing and filling of marble and stone

ASTRA 24K

Two component, super transparent mastic for the gluing and filling of marble and stone. Its good adhesive power and unbeatable transparency make ASTRA 24K a needful product for marble and light colored stones, and everytime transparency is a particular necessity. Typical example is the filling of travertino, whenever the characteristic holes need to be seen. ASTRA 24K is available in liquid (flowing) and solid (knife grade) version.

  • Method of use :

    ASTRA 24 K LIQUID: The parts to be bonded or filled must be clean, completely dry and free of dust. Add the liquid catalyst to putty 2% by weight, mix thoroughly until a homogeneous mass is obtained and apply on horizontal flat surfaces, by spreading with a brush or spatula or by pouring then spreading with a spatula. For material with very open porosities, it is advisable to proceed with a second application, after about an hour after the first. Once cured, the mastic can be sanded and polished after about three hours (20°C). ASTRA 24K SOLID: The parts to be bonded or filled must be clean, completely dry and free of dust. Add the liquid catalyst to putty 2% by weight, mix thoroughly until a homogeneous mass is obtained and apply by trowel on horizontal or vertical flat surfaces. Once cured, the mastic can be sanded and polished after about three hours (20°C). The temperature has very influence on hardening: it is not recommended the application below 15°C (see Tech Sheet of Hardeners for further info). 

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