Epoxy putty is a room-temperature-hardening substance used as a space-filling adhesive. It is stored until use as two components of clay-like consistency. Kneading the two components into each other creates an exothermic chemical reaction that activates the substance for use. When these are kneaded together an epoxide polymerisation reaction is catalysed. Unlike many other types of glues, epoxy adhesives are capable of filling gaps and even being used as a structural part by molding. Some brands advertise the capability to tap and drill their cured product, as well as it curing "hard as steel" (as measured by shore rating) in a very short time[1], though it's important to note it is much weaker than steel when comparing tensile strength or shear strength.
Standard epoxies (90%) are based on diglycidyl ether of bisphenol A formula[citation needed].
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Mighty Putty as seen on TV, advertised by the late Billy Mays, is a brand of epoxy putty adhesive and is intended for use in household repairs. It is made up of a hardener substance (dark green on the outside), and a base substance (light grey on the inside). The cylindrical shape of the base and hardener putty means that the user does not have to measure separate amounts of the substances as with some liquid epoxies. Advertisements claim that Mighty Putty easily bonds to a wide variety of surfaces, including wet surfaces. It is advertised on television in the form of an infomercial, hosted by the late Billy Mays.[2]. According to the infomercial, Mighty Putty can hold up to 350 lbs. It is also claimed that Mighty Putty can be used to fix leaks and create new mug handles for those cups whose handles have fallen off. [3] In February 2008, the Dallas/Fort Worth FOX affiliate KDFW-FOX4 reviewed Mighty Putty on its "Deal or Dud" segment. Average people and the reporter struggled to get the product to work as advertised and was called a dud[4], although average people claims it works and a show named "Better", a nationally syndicated lifestyle TV show [5] and other reviewers[6] claim it works. Other reviews show that the Mighty Putty works as a simple epoxy - but is best used for short-term fixes and minor projects.
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