Substrate must be free from any form of contaminants. Remove all blistered, cracked and peeled off paint from the surface if there are any. Prevent freezing of the product, it should be stored at a temperature not lower than 50C. Carefully stir the product before use. Remove all traces of friable elements, oil, grease, plaster spots, etc. from the surfaces to be treated Apply the prime coat diluted with 50% of water. For the following coats, use the products in its original density or diluted with a little water and make sure that the layer has completely dried up. The treatment will require at least 2 kg/m2 of MASGUM in a 3 coats system. In the case of particularly porous or hot surfaces, it is necessary to wet the surface before starting the treatment.