What Cause the Crack on Polyurea

In the process of spraying polyurea, we often encounter a variety of problems, one of them is crack.  How do these cracks come about?  Firstly let’s focus on the location of cracks, if the substrate underneath deformation or has overlap joint, is likely to be caused by the deformation of the substrate cracks.  It seem that polyurea is elastic, so it won’t crack?  No! This brings us to the principle of “zero extension theory”.  The elongation at break of polyurea, needs a certain elastic deformation space, if there is no elastic deformation space, no matter how high the strength of polyurea, will be pulled crack by substrate.  This is why we say "one point of polyurea, nine points of application", application technology has a very important impact on the success of polyurea project. 

Production Description：   

The system consists of A component, a quasi-prepolymer rich of free NCO, and B component, a mixture of polyetheramines, amine extenders and other additives. With high elongation value, JHSW8608 has excellent fire resistant property, It can be used for waterproofing application where good fire resistant property is required.