Oscillating Blade for Removing Caulk

[Whiskeymike]

I have a bunch of windows I need to re-caulk on the inside and out. On the outside, it's mostly a urethane caulk that is very hard and mostly brittle. (Probably 25 years since it was applied) On the inside of most windows, I think they used drywall mud, as it's chalky white, although feels pretty hard. I'm going to try using an oscillating tool to run around the window to remove any loose or excess caulk and was reviewing blades. There is quite the variety of scraping blades out there. Anyone have any experience in which ones work the best? Wide? Narrow point? Rounded? Flat?

 

[The Cobbler]

probably just buy a variety, try them and see how it goes .
you may find the oscillating tool a slow & painful ( on your hands & wrists ) process . it might be easy peasy too

 

[RTM]

I tried rounded ones and square ones for cleaning around brick, and preferred the curved leading edge. That finger one was a hard one to use, might be better in the wide open areas

You can resharpen them if needed for longer life, though I doubt caulk will be as abrasive as the brick edge.

 

[hefnerconstructionlc]

I had the rigid branded ones in the big set from hd. Only like 30 bucks for the whole set. Overall it's not a great set, but it's exactly worth what I paid for it. However the blade for the caulking worked really really well. Was not much to them so I think any of those you'll be happy with.

 

[dogdog]

I used the dulled out saw blade ones that is when all the teeth are missing and grind smooth.
sort of like the last one in the pic, but the edges are round. Works wonders on 30year dried caulk outdoor or bathroom ones.