Are Demeyere industry pans sealed?

This post says no. Williams Sonoma has a listing that says yes. Zwiling’s posts don’t specify for industry pieces, but they do say it is dishwasher safe,

(which anybody that followed the all-clad lawsuit should surmise is not actually the case if it isn’t sealed…)

There seems to be directly conflicting information. Can anybody confirm? My proline takes forever to heat up and I am looking into thinner rivetless dishwasher-safe pieces to add into the mix.