1. Rake out or cut slots into horizontal mortar joints
2. Use power/hand chisel to continue slots up to internal corner
3. Vacuum out the slots and thoroughly flush with water
4. Where the slot ends at internal corner, drill hole into adjoining wall diagonally as shown
5. Vacuum out the hole to remove all dust and debris
6. Bend the end of the Bar Flex to fit into the angle created by the hole
7. Fill the hole with resin and insert the bent end of the Bar Flex fully into the resin, laying the remainder of the Bar Flex in the slot
8. Allow resin to gel (15 to 20 minutes)
9. Gently ease the Bar Flex out of the slot and, using the Bond Flex gun kit, insert a 10 mm depth bead of Bond Flex into back of the slot
10. Push the Bar Flex into the Bond Flex to obtain good coverage
11. Insert a further bead of Bond Flex over the exposed Bar Flex and iron into the slot using the finger trowel.
12. Re-point or fill the rest of the slot and leave ready for decoration
13. Tie inner and outer leaves together using Dri Flex or Retro Flex wall ties.