From the product description, check product page for current description, price and availability:

• HIGH FOAMING- This sanitizer produces foam with little agitation for penetration into those cracks and crevices of equipment
• CONVENIENT NO-RINSE FORMULA- With only a 30 second contact time, this sanitizer doesn’t need to be rinsed off When left to dry on stainless steel at certain concentrations, it will passivate and protect the equipment
• SAFE AND EASY TO USE – Comes in an easy dosing dual-neck bottle with built-in measurements
• EFFECTIVE ON MANY SURAFACES- Great for use on carboys, kegs, fermentors, kettles, brewing systems, chillers, and heat exchangers
• USED BY PROFESSIONALS- Many craft brewers choose Star San as their sanitizer of choice in order to make good beer