It is used for applications over plastic, paper, wood, and ceramic. Loctite 574 flange sealant seals close-fitting joints between rigid metal faces and flanges. Because it is fast curing, it provides resistance to low pressures immediately after the assembly of flanges.

Sealant is a substance used to block the passage of fluids through the surface or joints or openings in materials, a type of mechanical seal. In building construction sealant is sometimes synonymous with caulking and also serves the purposes of blocking dust, sound, and heat transmission.