Shore hardness represents a standard for material hardness.
Shore hardness refers to the value measured with Shore hardness tester, its unit is “degree”, the description of the method is  A, D.  90 degrees below with Shore A Hardness tester test, and get the data, 90 degrees and above with Shore D hardness tester test and data. In general, for the structural glue, the test staff can be based on experience before the test pre-judgment, and thus decided to use Shore A hardness tester or Shore D hardness tester to test.Hardness may be defined as a material’s resistance to indentation.

What does Shore hardness mean for structural glue?
For structural adhesives, Shore hardness is the basis way for evaluate good quality.
Generally speaking, when the structural adhesive cured after 7 days, should be used D-Shore hardness tester to detect the hardness of the adhesive layer, and Shore hardness HD ≥ 70 qualified, and then the construction quality acceptance. If Shore hardness HD <70, should switch to good performance structural glue .