The Durometer is the International Standard Instrument used to measure the hardness of rubber or rubber-like materials. Durometers measure hardness by the penetration of an indentor into the rubber sample. The calibrated reading is expressed in a number value. The hardness values are always expressed in terms of plus or minus (±) five points (example: 60±5 Durometer).
It is important to note that when testing hardness of a rubber sample, the material should not be less than ¼” thick (.250″).
|Durometer Type (Shore)||Applicable to these types of materials|
|Type A (Shore)||Soft rubber & plastics|
|Type D (Shore)||Type D (Shore)|
|Type 00 (Shore)||Sponge & foam|
Approximate Durometer Hardness Comparisons
|Shore A||Shore D||Shore 00|
The above values are approximate and are not to be used as an exact equivalent. This information is provided as a selection guide only.