Guide 02 / G2
Surface preparation
A coating is only as good as its bond. Preparation is slow, noisy work, and it is where most of the long term performance is won or lost.
Clean
Oil, grease, dust, old sealers and loose material all stop a coating from bonding. Degreasing and pressure washing come before any profiling.
Repair
Cracks, spalls, holes and joints are filled or detailed with compatible materials. Moving joints need their own plan so the coating is not torn.
Profile
Concrete is ground or shot blasted to open the surface. Steel is abrasive blasted to the cleanliness and profile the data sheet names.
Check
Moisture tests on concrete, salt tests on steel and air, surface and dew point readings are logged before spraying starts.
Do
- Log weather and surface readings
- Vacuum dust after profiling
- Prime within the allowed window
- Photograph the prepared surface
Avoid
- Coating damp concrete
- Leaving salts on steel
- Feathering over loose material
- Rushing prep to save a day
General information only. Follow the product data sheet, the safety data sheet and your engineer.