Caulking All Exits
Apply caulk around the exit point of each discharge pipe leading from the basin. Wipe any excess away. Allow to dry.
Place caulk over the point where the vent pipe leaves the basin.
Squeeze caulk around the electric cable's exit point.
Construct a Cover
Place the wood on top of the basin.
Make an outline of the basin by drawing around it with a pencil.
Saw around the outline.
Apply caulk to the rubber gasket. Place the gasket on the wood and press down firmly. Allow to dry.
Cover the basin, with the rubber seal facing downwards and caulk around the cover making it airtight. Allow it to dry.
Things You Will Need
- Measuring tape
- Rubber gasket
- Caulk Gun (optional)
- After sawing around the penciled outline, file the edges down with a rasp to prevent splinters. Remove excess caulk by wiping away with a damp cloth. If you are sealing the basin because there is evidence of radon gas emission, then buy a basin cover with a viewing window. A solid cover means frequent removal for maintenance and trouble-shooting.