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This practice provides information on the handling and proper use of chemical-resistant resin mortars. For hand mixing, a shallow mortar box should be provided. The equipment for power-mixing ranges from small mixers to simple heaters used on low-speed motors. Also, the equipment may be required for heating or cooling materials as conditions dictate. For hand mixing, the liquid shall be measured into the mortar box then stir the powder in gradually, working out all lumps and air bubbles. Mix with a mason's trowel or other suitable tool. On the other hand, for power mixing, the liquid shall be measured into the container and mix in the powder gradually and uniformly. No additives such as sand, Portland cement, or water should be added and containers of resins and powders should be closed when not being used. After mixing, mortar should be transferred immediately from the mixing vessel and spread in a thin layer on the mortar pan, as mortar heats up during setting and thick layers or large masses retain this heat. Retained heat shortens the working time. Mixed mortar that has become unworkable shall not be retempered with resin liquid but shall be discarded. After transferring, laying chemical-resistant brick or tile shall be done. The brick or tile shall be dried. The mortars shall be cleaned from chemical-resistant brick or tile and resin mortars shall be cured at normal temperatures afterwards.