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version 2021A page 12 / 29
d. Clean the color steel roofing
• To ensure silicone achieves sufficient bond, the roof must be thoroughly cleaned, free of dirt, debris
and metal powder. If you are unsure of the state of the roof, please contact Sunman for assistance.
• Clean off excess dirt and debris off the roof sheet with rags and water. Leave to dry. If it is extremely
dirty, pressure cleaning with water is recommended.
• If using Tonsan 1527, clean the roof with isopropyl alcohol and wait to dry.
• If using Sika SG-20, apply the Sika Aktivator-205 on to clean cloth. Wiping down the roof, apply to the
adhesion area. Reapply until clean. Leave to dry.
e. Install chemical bonding material
• Consult and strictly adhere to installation requirements specified in the Sunman engineering
certificates
• Do not install apply silicone to roof while moisture is present
• Apply the silicon with the nozzle perpendicular to the roof. The length of the chemical bonding material
shall span the full length of the contact interface, i.e. if the panel is installed in landscape, the silicone
bead shall span the full width of panel and if the panel is installed in portrait, the silicone bead shall
span the full length of panel
• Do not let a “skin” form over the silicone. This will directly impede the final curing strength. To manage
this, only apply enough silicone to the roof for one module at a time. See note from Sika installation
manual below on how to check for the presence of a “skin” over the silicone:
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