Putty knife

An experienced glazer will apply the putty by hand, and then smooth it with the knife.

Modern insulated glazing may use other ways of securing the glass to the window frame.

A spackle knife (called a scraper in British English, also known as a spatula in American English) is also commonly called a "putty knife",[1] and is used for scraping surfaces or spreading material such as plaster in various construction trades.

Due to the conductive nature of metallic blades, they should be kept at a safe distance from electrical components.

Disposable knives, with handle and blade molded as a single piece of plastic, are suitable for occasional jobs such as spreading roof patching tar or mixing two-part adhesives, avoiding laborious cleanup which may involve hazardous solvents.