Autosmart G101 is a highly concentrated multi-purpose cleaner, and should thus always be diluted to an appropriate strength before use. For general cleaning duties it should be diluted 30:1 (water product), while for more intensive degreasing duties it should be diluted 8:1 (water product). Autosmart G101 may also be used for wheel cleaning and synthetic sealant removal duties; in such cases it should be diluted 5:1 (water product) and spot tested before use. In all cases, an appropriately diluted solution should be sprayed directly onto the surface to be cleaned and then agitated thoroughly with a suitable detailing brush (a Meguiar’s Slide Lock Detailing Brush is usually ideal) before being carefully rinsed off. Ensure that you never allow Autosmart G101 to dry out fully before it is rinsed off, otherwise permanent staining may occur.
Can go down to 5:1 so they say, I have to say I only have the Megs APC that i have used to take my car back when I'm starting afresh but the G101 gets good reviews. You could mix 100ML G101 with your foam and as they say "dont let it dry"