Glug is composed of sodium hydroxide flake.  Many other similar products use sodium hydroxide prill (little beads).  The prill is denser and has less surface area.  Unlike the flake, it does not get caught in the clog as easily and therefore can pass through the clog without dissolving it.
Oatey believes that due to the dangerous nature of Clobber; it should only be used by professionals who know how to use, handle and store the product. Clobber should never be used by an individual that is not trained, and does not understand the dangers of sulfuric acid.
Clobber is a concentrated blend of sulfuric acid and Sizzle is composed of hydrochloric acid.  Sulfuric acid is very effective at dissolving organic material, like food, grease and hair; Sizzle is used for dissolving inorganic material like mineral deposits, lime rust and scale. 
Pipe/Gasket Lube is a Non-Toxic soft paste like material used to lubricate bell joint pipe gaskets before assembly. It will not deteriorate natural or synthetic rubbers, and does not support bacteria. It will dissolve in hot water. 
Yes. This product can safely be used on rubber and synthetic O-rings, and plastic parts. This product does not contain any petroleum products.   
This product should only be used on turning or sliding metal products. It is petroleum based, and could affect the integrity of plastic and rubber parts. 
No. This product is not NSF listed.
Hercules hand towels will not irritate your hands and have Aloe Vera, vitamin E and lanolin moisturizers which leave hands soft and smooth. While safe for many finished surfaces, they soften and remove plastic cements.   
Weight = 20 or ISO 68 viscosity oil.
This product is intended for general lubrication and is safe to use on most circulating pumps as well as bushings, bearings, linkages and sliding parts. This product should not be used on light electric motors.