The most common Clog Buster failures occur because it was inserted into the drain pipe improperly. Clog Busters must be fully inserted into the drain pipe and not into an 90 degree elbow, or Tee fitting. These fittings allow for uneven expansion and eventual failure. 
This product is an herbicide and therefore must be registered with each state’s EPA.  Some states do not allow copper sulfate to be used as an herbicide.
PT Bio1 uses bacteria blends to completely digest and eliminate grease.  PT-4 uses solvents to liquefy it and move it out of the system.  PT-4 acts faster but does not completely digest the grease, it simply moves the grease out of the system.
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.