I install a lot of separate back splashes. In laminates, and solid surface. Also, I seal countertops around walls etc. For the last 25 years, I have used the same dispenser and it is the only one that I like. Not cheap, but great. I use it with cartridges.
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buy the colour EARTH, by the case. Very versatile and translucent enough to 'pick-up' the adjacent colours of the countertops and walls.
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buying silicone, always observe the expiry date.. it means something.
r