This has been addressed before. According to DG lately, no. The label says (or used to say) it would work with any polymeric sealant. I remember reading a poster say he tried it (sorry, don't remember which product) and it worked well. It can't hurt in my opinion. If it's a polymer sealant, you should be good. Try it, you've got nothing to lose.
601 has some cleaning ability, right? Wondering if I could use this in place of my standard pre-wax cleaner - and if it adds any durability to the sealant that gets applied after, even better.