Product review (3 stars): The bottom of the T, which slides into the ...
The bottom of the T, which slides into the groove you are trying to cover, is 5/8 of an inch from one side of the strip, leaving 1 and 1/2 inches left on the other side of the strip, so it feels a bit wide for some spaces.  The texture of the silicone is smooth but it stays in place well; it's flexible enough to adjust to minor spacing issues.  Here's the biggest consideration:  on my gas stove the grills for the burners extend to the very edge of the stove, and thus touch the silicone strip slightly, and after two weeks the strip is starting to show wear from the heat.  It seems the product would resist heat that radiates through the air or through the metal of the stove's outer shell, but it clearly does not resist heat that radiates through the grill that sits above a gas burner.