Depends on the type of product to which the additive has been applied.
INSTRUCTIONS FOR USE:
Ready-to-use product. Dose it to the render or paint before the application. Apply when the temperature is between 0° C and + 10° C. Do not apply on frozen substrates. Protect the covered surface with foil or dense mesh till drying. The temperature during application and over the next 8 hours cannot be lower than 0ºC.
The areas where the product was used or elements covered with the product must be ventilated until the odour vanishes completely. Only then can they be used.