If there is gap due to defect of the wall it is not square then the countertop should have been cut to accommodate that.
Gap between backsplash and wall.
If the gap between the countertop and backsplash is more than 3 8 inch it s generally too wide to fill and is best handled with trim but you can try to close the gap to give yourself the caulk option.
You ll need a drill with a no.
Connecting the counter with the wall or backsplash.
Only other way to mitigate it is to have a backsplash made out of the same countertop material.
If the gap is too wide to seal with silicone narrow trim molding can solve the problem.
An obvious gap between a countertop and backsplash is unattractive and it can allow water to seep through.
Easy way to perfectly caulk the gap between countertop and wall.
On nov 26 2017.
Hometalkers are the best.
Even if the gap is.
Want to add a backsplash but have a gap between the wall countertop.
I would not be comfortable with caulking of that size.
We surprise ourselves with what we can come up with when we find a problem.
A kitchen backsplash not only protects your walls from splattering oils grease and other food products it has an aesthetic value all its own.