ガスケット交換用ガラス食品容器用ユニバーサルシーリングリング、ガラス食品保存容器の蓋用、Oリング交換用蓋。

This works just fine, as long as it installed the right way. Compared to the original gasket, which has more of a square profile, the new gasket is more of a rectangular profile. Initially, I installed the new gasket with a wider profile down into the grove. That did not work. I then compared to the orientation of the original gasket. I then has to cut another piece, as the narrow profile results in a different length. However, it absolutely works.

Not worth to buy not fit for all container

I wasn't able to find a replacement for my Glasslock gaskets at the official Glasslock site. But this worked great as a substitute as an aftermarket product. Fits the Glasslock fine. You just insert into the lid to measure and cut with scissors. The original gasket rips when you take it out to clean it due to food and mold growth.....so new ones are needed. The only downside is that there is a cut, so it isn't a singular circular gasket. But we fix this issue by using saran wrap to prevent food from entering the cut area. It works and becomes super leakproof. Good product!

Bought this to put a replacement gasket on a round handmade teapot lid. Formed a circle, cut strips from another piece to slot and glue into the open ends of the channels to securely attach the ends into a circle. Taped the joined ends onto a couple of cocktail sticks with insulating tape to hold the ends together till the silicon glue dried. You do need a tube of silicon glue. Worked a treat. Holds on lid just with friction. Plenty left for next seal replacement.

Buen material.