Put on protective clothing, goggles, gloves and a breathing mask to protect you from airborne particles of the sealant.
Pour the sealant into the reservoir of the garden sprayer and cap it.
Pump the sprayer's pressurized spray lever to create pressure within the mechanism.
Spray the sealant over the fence, working in even strokes with the grain of the wood.
Brush over the fence with a paint brush to work the sealant into the wood.