The concept and performance of penetrant (JFC) and precautions during use The full name of penetrant (JFC) is a fatty alcohol polyoxyethylene ether, which is a nonionic surfactant. As the name suggests, penetrants are osmotic, and are substances that have a fixed hydrophilic and lipophilic group, can be aligned on the surface of the solution, and can significantly reduce the surface tension. Special attention: porous or dry ground, where the concrete seal curing agent should be kept moist, when the surface is glued. It is better to be smooth, immediately sprinkle a small amount of water with a brush, or the machine brush surface concrete seal curing agent penetrates into the inner layer.