- 1). Use an angle grinder with a cup wheel to sand the two granite surfaces that will join together. The object is to remove any glossy finish and rough up the bonding areas to ensure a strong bond between the two pieces. A cup wheel is a diamond-encrusted sanding wheel used by fabricators.
- 2). Wipe the sanded surfaces with a rag and acetone to remove any debris, film and dust from the two surfaces.
- 3). Mix the epoxy with the applicable epoxy colorant to achieve a color match as close as possible to the granite's color.
- 4). Add a small amount of epoxy hardener to the epoxy you mixed in Step 3. The more hardener is added, the faster it will kick off. It is better to mix a little extra than to fall short of the amount needed to bond the two pieces.
- 5). Distribute the epoxy mixture with hardener evenly across the applicable surfaces of the granite.
- 6). Join the two granite pieces, make any adjustments and clamp them together, using the bar clamps. Do not apply too much pressure with the bar clamps, as you could damage the granite.
- 7). Wipe away any excess epoxy that might have squeezed out of the joints. It is easier to remove before the epoxy kicks off and hardens. A flat razor blade trims hardening epoxy easily.
- 8). Remove the bar clamps after the epoxy has set. It usually takes between 30 minutes to an hour to harden, depending on the amount of hardener used and the current weather conditions.
- 9). Mix more colored epoxy with hardener, and fill any voids in the seam between the two pieces when necessary.
- 10
Polish the seam and granite edge, using a granite polisher with a polishing pad. Polishing pads are part of a set. Start with the lowest grit, and work your way through to the highest grit to achieve a professional result.
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