Unfortunately, we don't have our own car soap at the moment.
We have one in development, but it is still a few months away from being released, as we never release anything until we are 100% satisfied with its performance.
I don't want to point you to a specific soap as I would feel terrible if you didn't end up liking it.
But any big-name brand car wash soap should be mild enough to not strip off the wax.
We are trying to get the rest of the product line released as quickly as we can.
Our own car wash soap formula that works with our sealant and waxes is definitely in the works.