For me, paint sealant, such as Chemical Guys Jet Seal or McKee's High Def are the toughest material to get out of my pads.

It seems that I soak and brush and rinse and squeeze and then i can STILL squeeze out a little more white paint sealant if I squeeze really hard.

I soaked 3 blue pads that had Jet Seal and High Def in them for 7 days in Chemical Guys Pad Cleaner. Today, I rinsed them and squeezed them out. All the sealant seems to have been broken down and rinsed out. I could not squeeze out any more sealant. this is not the usual for me. I usually soak for maybe a few hours at most.

I will try to do a more scientific test of this after the next car with paint sealant.