Durometer vs. Modulus

Durometer vs. Modulus for Rubber Products

Rob PruynOther

Durometer is a measure of a rubber’s resistance to indentation. More commonly, however, it’s known as a measure of hardness. Modulus, another material property, is the stress or force that’s required to produce a strain. Higher-durometer rubber usually has a higher modulus, but that doesn’t mean the relationship between durometer and modulus is straightforward – especially in terms of stiffness. …