Silicone Rubber Sheet,Heat Resistant, Heavy Duty,High Grade 60A,12 x 12 Inch, 1/25 Inch Thickness for DIY Gaskets, Pads, Seals, Crafts, Flooring,Cushioning of Anti-Vibration, Anti-Slip

Worked great for my project. As others have mentioned it’s not square.

Not good Fuel tank gasket material

This is perfect for what I needed - a (relatively) thin rubber sheet I could cut to size and use as gasket behind a doorbell intercom mounted on stucco. I searched high and low in a big box hardware store one night but came up empty handed. I found this at Amazon and couldn’t be happier.

The product works but realize it is not actually 12 by 12. it is 1/16th inch short on both length and width. Unfortunately, I needed this product to be exactly 12 by 12, being a 16th of an inch short in both directions renders it useless for my purpose. Good product but realize like others have said, its not square and its smaller than 12 by 12.

I like it. It is very excellent for my home made pressure can of tennis ball as gasket . It is a real rubber so that the sealing ability is powerful . I would like to recommend it.

Product as described

The other one is in the trash-burned

At first I bought the rubber to add it to the back of the speakers in the backyard to have less vibration. Now I use it a lot, for example to prevent scratches on a surface.

I used this silicone sheet to repair a leaking drain pipe joint. I cut it to form a close-fitting sleeve around the joint connecting two pipe sections, and secured it with hose clamps. This high quality silicone is tough but compressible, so it can be used to seal surfaces that are not completely smooth--or even a curving surface depending on how clever you are in cutting the silicone. After clamping the sleeve there was no further leakage. This was a non-pressurized pipe; other methods might be more suitable for repairing pressurized pipes.

Easily cut with gasket cutter. Seems to work fine and should be able to withstand weathering. Sheet will provide materials for many more gaskets.