The C-UV is a simulation laboratory of the nature destruction force, predicting the relative durability of materials exposed to the inclement weather. It has a CONDENSATION process with POTABLE water saturated with OXYGEN, self-generated by the system. The exposure TEMPERATURE of the proof bodies is automatically controlled according to the programs established for UV/CONDENSATION cycles. In a few days or weeks the C-UV can produce the degradation that would occur in months or years. In this degradation we observe the destructive effects of weathering: calcination, loss of color or brightness, turbidity, loss of opacity and plasticity, loss of adhesion/resistance, appearance of cracks, bubbles, etc. The system complies with ASTM G-154, ABNT NBR 9512, ISO 4892, DIN, AATCC TM 186 standards.

The wetting and drying cycles consist of immersing the proof bodies in water, until complete saturation, and then drying at room temperature or in an oven at 40ºC. The objective is to evaluate and compare the behavior of the adhesion strength of the DunDun polymeric compound and the conventional cement mortar after exposure to wetting and drying cycles under standard climatic conditions.

Immersion of proof bodies in neutral, basic and acid solutions for a period of 07 days. After this period the samples are washed in running water and put to dry for 24 hours in an oven at 110ºC. The proof bodies were molded with the DunDun polymeric compound and applied directly from a 3kg package in one mold. Immediately after it is covered with damp cloth, for 5 days. After this time, the samples are put to dry at room temperature for 48h. The objective is to evaluate the resistance to chemical attacks by simulating adverse application conditions, such as unhealthy environments, exposure to acidic and basic gases and compatibility with pH of coating mortars.