1. Test wood surface by sprinkling water on it. If wood absorbs water quickly, it is ready to be sealed. If wood does not absorb water, let it dry for several weeks before sealing.

2. Sand rough areas and vacuum deck. Apply clear sealer to all wood surfaces, using a pressure sprayer. If possible, apply sealer to underside of decking and to joist, beams, and posts.

3. Use a paint brush to work sealer into cracks and narrow areas that could trap water.