Safe and effective option for unplugging heater core
I have seen traditional CLR used effectively to unplug heater cores and save a bundle on a heater core replacement.  Also effective on removing rust and corrosion from radiator and cooling system if you are having overheating issues on older, high mileage vehicles.  This CLR PRO should be even more effective than the normal CLR and certainly a safer bet than various home-brew flush solutions that could damage your cooling system.  I like the fact that it is non toxic and biodegradable, which is pretty surprising given the job that this has to do to break down calcium, lime, and rust (hence, CLR) and remove all that scale and clogging.  But the description clearly states "Non Toxic Products: CLR PRO Automotive products are safer alternatives and contain no phosphates, ammonia or bleach; Non toxic and readily biodegradable" which is awesome.  The small pint and a half containers are nicer than the large gallon jugs in my opinion since you don't end up with half used jugs around and these smaller containers are easier to store.<br /><br />For DIYers looking for tips on how to deep flush a heater core with CLR, there are lots of videos online, but I recommend searching on youtube for "sound main auto CLR" for a great short video on a great DIY flush technique that is very effective and uses inexpensive parts rather than expensive professional equipment.
Rating: 5 stars