IAPMO IGC 277-2013e1 (R2020) covers flexible polyvinylchloride (PVC) gaskets intended to seal the joints between water closets and urinals and sanitary drainage systems and specifies requirements for materials, physical characteristics, performance testing, and markings.

Gaskets covered by this Standard are "sleeves" intended to be inserted into and compress against the inside diameter of the DWV pipe or water closet or urinal flange while attaching to the plumbing fixture with an adhesive.

The requirements of this Standard are not intended to prevent the use of alternative materials or methods of construction, provided such alternatives meet the intent and requirements of this Standard.