Devcon Maintenance and Repair Solutions - Sintemar

Field Application Reports
Products:
Application Date:
Customer:
Industry:
Location 80
Head Gate Seal Interface
Repair
Epoxy Concrete Sealer 100 / Titanium Putty
1/7/91
Ontario Hydro
Utility Power Generation
Problem:
Both the head gate and the metal interface track on the wall received extreme corrosive and cavitation
damage. This interface must form an effective seal and prevent water from traveling down the runner. In
some areas the metal was worn as much as 1/2”. The previous method of repair was welding the worn
areas to rebuild missing metal. Welding had caused heat distortion problems in the past effecting the
interface seal.
Solution:
The entire track area on the wall was sandblasted to a SSPC-SP5 white metal finish. The complete gate
area was roughened using a grinder and wire wheel attachment. Epoxy Concrete Sealer 100 was applied
as a primer and to seal against water seepage. Epoxy Concrete Sealer 100 can be applied to damp
surfaces. Plywood framing was used as a mold on the track side to rebuild the missing metal to original
dimension. Release agent was applied to the plywood frame for easy post cure removal. Titanium Putty
was applied to the gate and track areas. Titanium Putty was successfully used to rebuild the missing
metal and re-establish the seal between the gate and track. Because of the overall cost savings and
product performance, Ontario Hydro have specified this procedure for future repairs.