What are Visco-Elastic materials and how do they behave? They are neither solids nor liquids. This makes their behaviour unique.

Time and temperature change significantly affect- and in an exponential pattern- their behaviour. This significant change makes them lose their Adhesive/ Cohesive strength in a dramatic manner.

VEC performance is completely different at accelerated tests than in real conditions when kept for years on underground pipelines.

Changes in the Modulus of Elasticity against temperature. Their Glass Transition Temperature point, the Rubbery State temperature range & Melting Temperature, all play significant roles in VEC performance; nevertheless, they never been declared.

What VEC manufacturers did was to structure their datasheets to make them misleading.

Finally, we will show examples of VEC failures, due to all the above root causes undeclared in the datasheets.