Repair a small section of silicone seal

[Old_Badger]

I sealed between some solid wood worktops and the wall with silicone sealant. Unfortunately some water has penetrated the wood in one place and gone underneath the silicone seal.

I think I need to remove the seal at this place. Then I can sand and oil the wood better, and apply some more silicone sealant.

I know it isn't a good idea to apply new sealant on top of old but is it okay to replace a small section of the seal? Will it leak where the new and old sections meet?

 

[Johnmelad502]

I sealed between some solid wood worktops and the wall with silicone sealant. Unfortunately some water has penetrated the wood in one place and gone underneath the silicone seal.

I think I need to remove the seal at this place. Then I can sand and oil the wood better, and apply some more silicone sealant.

I know it isn't a good idea to apply new sealant on top of old but is it okay to replace a small section of the seal? Will it leak where the new and old sections meet?

You would need to make sure that the old seal is 100% clean or the new might not take.

 

[Old_Badger]

You would need to make sure that the old seal is 100% clean or the new might not take.

I thought there must be no old sealant at all underneath the new. Hence all the stuff about sealant removers.

But my question is about cutting out a small length of the old seal and inserting a small section of new sealant.