1TubeGE Advanced Silicone Window & Door Sealant - Clear
1Spray BottleGrout Sealer for Bathroom & Shower Tiles
Instructions
Fill in the finger holes by wadding up paper towels and stuffing them down into the holes filling them about ⅔rd of the way. Fill the rest in with the caulking.
Using the sandpaper rough the ball up a little just to give it a better tooth to grab the glue.
Put a dollop of your GE Advanced Silicone onto the back of each "gem" and glue them onto the bowling ball one by one. They should be touching each other.
You can glue the gems onto roughly half the ball, wait for those to set up and then turn the ball over and glue the gems onto the other half. You can set your ball on top of a mixing bowl to keep it from rolling around.
Using disposable gloves I spread the grout over half the ball pushing it down between the mosaic pieces and allowed it to dry for 15 minutes.
Run a damp sponge over the gems to get the vast majority of the grout off the TOPS of the gems (you leave it in the grooves and sides though). A soft brush or paper towels will also work.If you let the grout dry completely on the tops of the gems, it will be very hard to get off later.
Flip the ball over and grout the rest using the same technique.
When the grout has completely dried, use a clean dry cloth to polish off any haziness caused by the slight grout residue.
Follow the directions on your bottle of grout sealer to seal the grout against the outdoor elements (most likely your sealer will tell you to spray it on, allow it to dry and buff off the tops of the gems).
Notes
Make sure you are using a silicone window and door sealant so it is made to hold up to anything from rain to snow and summer heat to winter cold.
Make sure your grout specifically says it is for indoor & OUTDOOR use. Not all grouts are.