There are many uses for silicone caulk in our homes, however, when it comes to removal, this can be the trickiest caulking to get rid of. It can be used as a weather sealant, an adhesive, and to fill in joints and gaps, so you will most likely find it on wood surfaces, tiles, and other such materials. Removing silicone caulking from wood requires precision and caution, but it can be done. Keep in mind that using a screwdriver or a chisel to scrape the caulking is ineffective and can even damage your wood surface, so opt to follow these steps and get a better result.
Step 1 - Perform a Preliminary Check
Before you begin, you should do a spot test with the silicone caulk remover. This is to ensure that the remover does not damage or discolor the wood's surface. Also, if you are removing the caulking from a joint where it was used as a sealant, do check if there is a backer rod under it. The backer rod should also be removed, especially if you are resealing the joint.
Step 2 - Remove Loose Pieces
If the sealant is old, there will be loose bits peeling away and falling off. These can be removed with your hands. Scrape the area with your finger, and pull off anything that comes away.
Step 3 - Heat the Caulk
Next, use the heat gun or hair dryer to heat what's left; heating the caulking helps to soften it for removal. Be careful not to overheat the area as it may damage the finish on the surrounding wood surface.
Step 4 - Remove Remaining Caulk
When the caulking is sufficiently softened, use a razor blade to carefully scrape or slice it. It is important to keep the angle of the blade low, as this will help prevent you from scratching the wood underneath. Be careful when working with the razor as it is very sharp.
Most of the caulking will slowly begin to come off in large threads or flaps. Hold the ends using your hands, pliers, or tweezers, depending on the size and thickness of the bead, and pull it off. You should be able to remove almost all of the remaining caulking in this step.
Step 5 - Get Rid of Residue
Since silicone can work as an adhesive, there will some residue left behind on the wood even after you've removed most of it. Apply the silicone caulk remover mentioned earlier to the area where the caulking was used, and clean it using a damp cloth. Be careful not to wet the cloth too much as the moisture may cause problems for the wood.
Step 6 - Finish
In order to ensure that the wood remains clean and damage-free, follow up using a wood cleaner as directed. This will create a clean, debris-free surface for primer and paint, stain, or a new coat of lacquer or varnish.