My indoor concrete floor has saw cut seams on a 6ft grid. They are 1/8 to 3/16 wide and 1/2 deep. Great dirt catchers. I can get them really clean and the concrete is less than a year old. I would like to fill them with caulk so that they are level and not debri catchers. II know there are products made for this but they are off shade gray so I would like to use a clear filling and let time and wear blend it in. The floor might be sealed but it will not be painted.
What material has worked well for others? Silicone or poly urethane or...? Expoxy is too expensive. Thanks