If your molding is painted white caulking with white caulk is all that s necessary for a perfect finish.
Caulking stained wood siding.
These chemicals darken as the wood dries leaving streaks that can show up through a layer of stain or paint.
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If paint will ever be applied to an area then silicone does not belong there ever in any way.
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The best option in the case of stained wood molding is to stain the caulk to match the wood.
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Therefore if your siding is very old and extremely discoloured your best bet might be to work with paint.
While paint does tend to somewhat glue these pieces together caulking them is never advised and can cause permanent damage.
Stain generally comes in a variety of different pigment concentrations thus some will cover more than others.
Siding caulk.
Cedar naturally releases chemical extracts when it gets wet.
If your molding is stained white caulking would cheapen the finish and diminish the value of the work.
Caulking them is a mistake and the caulking is likely to fail prematurely.
The best way to prevent bleeding is with a water tight seal.
Flashing acts as a waterproofing layer for this type of siding and caulking will prevent the flashing from doing its job.
Placing caulk over large portions of wood siding prohibits the natural movement of the wooden panels and can cause extensive damage to the exterior of your home.
Silicone caulk is excellent at water sealing and flexibility so it has its place in construction.
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The main side effect of a botched cedar sealing job is chemical bleeding.
Siding is often textured and if you slide the tip of the tube along the bumpy texture the bead of caulk will.
Do ride the smooth edge when caulking a seam between a window and textured siding.
On the other hand stain or dye will penetrate most materials including wood brick and sometimes even vinyl.
Many professionals like those at james hardie also agree that you should not use caulk on fiber cement siding unless there is no metal flashing underneath.
Possible side effects of sealing cedar siding.