Tile and cracks

I had some ceramic tile installed in my kitchen. The area that forms a 90 degree mount to the wall, the groute constantly crackes, no matter what I do. This could be from the fact that the dishwasher is in the subcabinet, and the constant shaking is creating stress cracks. Is there some sort of silicon I can use instead?
Thanks so much
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I have a similar problem that seems to occur each year at this time. One of my kitchen counters runs about 25 feet along an exterior wall and it looks like the wall moves away from the rear of the counter by at least 3/16 inch for a distance of about 8 feet in the center of the counter. Enough to tear the seal between the counter and the backsplash. The flat granite of the counter is not going to bend in the plane of the counter so it must be the wall that's moving. When it's cold this happens each year. We've been quite cold for a while and with no snow the ground is cold. Neighbors had to do some digging last week and found that the frost depth is 52 inches.
If your problem is due to the same causes I'd look for something very compliant, not grout. Does it happen during warm weather also?
RB
Simpledog wrote:

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Try white silicone bathtub caulk, using supplied nozzle cut to medium point. It is pure white, looks like shiny grout, and can tolerate a lot of crack movement.
. This could be from the fact that the dishwasher is

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I used sanded caulk to replace areas where grout kept cracking, it comes in the usual grout colors (I used a sand color in the kitchen and grey in the bathroom), when it dries it looks almost exactly like the grout. I put it in a year ago and it has not re-cracked since. It was latex based I beleive.

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