heat insulation line with ripple does not display

[Giovannino60]

I wanted to insert a thermal insulation line that the classical ripple, I also changed the scale of the thermal insulation line, but I do not see the ondines i.e. I see it straight with dots and just...., I also attach image.
What can I do?

Thank you.

 

[Giovannino60]

I attach image of how I see the isolation line.

 

[Giovannino60]

Can no one give me advice on how to solve the problem?
Thank you.