How to Seal Outdoor Wood Gaps
- 1). Sand the wood gap on the building or house with medium-grit sandpaper. This action gives the sealant an abrasive area to adhere to the wood.
- 2). Place a tube of exterior silicone sealant on a flat surface while supporting it in one hand.
- 3). Cut the end off the sealant tube at a 45-degree angle with a utility knife.
- 4). Slide the tip of the sealant into the top support ring of a caulking gun and place the tube in the caulking gun body.
- 5). Place the caulking gun tip in the outdoor wood gap and squeeze the trigger. The caulk will flow out of the tip. Fill long gaps with caulk by squeezing the trigger and walking while the caulk flows out of the tip.
- 6). Fill a deep gap with caulk up to the surface level, let it dry for 24 hours and refill to the surface level.
- 7). Sand the caulk with medium-grit sandpaper and paint it to match the color of the house or building so the repair job is not obvious.
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