... also known as Pernifer 42, NILO 42, and Glass-Seal 42.Alloy 46A controlled expansion alloy, consisting of ... known as Pernifer 46, NILO 464, and Glass-Seal 46.Alloy 48Alloy 48 is a controlled expansion alloy ... known as Pernifer 48, NILO 48, and Glass-Seal 48.Alloy 52Alloy 52 is a controlled expansion ... known as Pernifer 50, NILO 50, and Glass-Seal 52.Our company supplies the highest quality special ...