When purchasing latex paint, a good price/performance ratio should be used as the purchasing standard, and latex paint with corresponding characteristics should be selected according to the different functions of the room. For example, choose products with better mold resistance for bathrooms and basements, and products with better stain resistance and scrub resistance for kitchens and bathrooms; choose latex paint with certain elasticity, which is beneficial to cover cracks and protect the decorative effect of walls. Because there is a very close relationship between various properties of coating products, and even restrict each other, for popular multi-functional products on the market, the single performance may not be outstanding, but the overall performance is generally better. Unsealed latex paint, as long as it has not been mixed with water for 5 years, will be fine, and there will be precipitation when using it. Just stir or shake it for a while. Pay attention to storage at room temperature, and do not keep it below 0 degrees for too long.