Abstract: In the paper,we introduce the usage effect and making of JL product in hydrogeological exploration.On the basis of the condition:diagonal borehole,irregular borehole wall,and rock crack,JL product successly solves the problem of stopping water.The productive examination shows that,JL product posses fine plasticity,viscosity,ductility,control putrefaction,resisting-water and smudgeless.As a whole,JL product have a series of excellence,which may take on low cost also get easy.