Tests. In a kitchen, the seam between granite countertops and wall tiles can be less than 1/8 inch. A caulking gun can apply too much sealant if you're not a pro. This tubular silicone caulking applicator from GE did a great job with a small caulking line. Most of the tubing was used up on the 20 foot run. Youtube may find a useful trick. Apply this sealer, smooth the sealer with your finger, spray onto the area with non-ammonia foam window cleaner, then use your finger to remove the excess sealer, simply allow the foam cleaner to dry. No paper towels near work. The results look professional.