Joint Preparation

1. Sealant and Residue Removal

• Cut away failed sealant as close as possible to the joint edge and remove all existing sealant and backing materials.
• Clean all joints of contaminants and impurities to the depth at which the new sealant and sealant backing are to be installed.  This may be accomplished by the following methods:
  • Porous Substrates: Diamond grinding for concrete, masonry,   brick and similar porous substrates to expose virgin substrate.
  • Non-Porous Substrates:  Razor knife for non-porous substrates such as metal and glass followed by a solvent wipe to remove most if not all residual sealant.
  • EIFS Substrates:  Extreme caution must be taken when restoring EIFS joints. Sealant must be removed by razor knife only in order to maintain an undamaged EIFS substrate surface.  Grinding is prohibited.
  • The Pecora Silspan EIFS restoration system may be utilized in order to prevent any substrate damage possibly caused by attempting to remove existing failed sealant.