Bio Green Clean has to be diluted for use on most surfaces and I have several spray bottles prepared with different dilution ratios ready to go for anytime the spirit moves me to clean something, and I don't even need to wear gloves to use this stuff. The Bio Green Clean website has a chart with recommended dilution ratios for cleaning almost anything.My favorite thing about Bio Green Clean is that it can be used to remove paint, even very old latex paint, from metal, tile, plastics and glass, if used at full or half strength. I've even used it to remove latex paint spatters on hardwood and laminate floors, just using the standard dilution, without any damage to the finish. It doesn't work instantly, it requires some patience and maybe a little scrubbing, but it's worth the extra effort to avoid possible damage to surfaces, toxic fumes and bursting into flames that can happen with those other paint removers that promise instant gratification.The gallon size usually lasts a long time, because it has to be diluted for most applications. But I like having a little extra on hand for random projects like removing paint to restore some old hardware, or deep cleaning concrete and stone walkways out in the yard.Seriously, this can be used to clean almost everything, and it cleans better than the other cleaners out there, without damaging anything, provided that the dilution used is the right dilution for the job.I strongly recommend this product.