Preservative for KPI- clay, mortar, concrete. KPI clay according to the construction environment, temperature, humidity, flexibility and sodium silicate ratio, the initial setting time of 45 minutes to 1 hour, final setting time within 15 hours of the applicable standard. KPI mortar used as a play mat, KPI as the basis for concrete masonry, no matter what the product according to national standards, according to the health environment to achieve the next 30-33 days curing period before detection compressive, tensile test, the above construction norms should be strictly construction brief guide China in accordance with the construction specifications developed corrosion Association carried straight. The main considerations are: the ratio of masonry masonry in a limited time after → eliminate flooding, rain, acid treatment exposure → conservation of specific conservation after before use.