Serious question, should you caulk before or after painting trim?

I was finishing up a baseboard install in my living room last weekend and got into a debate with a buddy who swears by caulking after paint. I’ve always done it before, filling gaps then painting over, but he says it cracks less if you paint first then caulk. So I tried his way on one wall and my way on the other. Now I’ve got one side with clean lines but tiny hairline cracks, the other side smooth but the caulk looks a little glossy. Has anyone else tested this and found a clear winner?

2 comments

2 Comments

maxmurphy28d ago

Test both ways on scrap trim before doing a whole room next time. Paint first then caulk usually gives you a tighter seal because the caulk bonds better to the painted surface. Your glossy caulk problem is likely just a matter of picking a paintable caulk instead of the acrylic stuff.

ryan_clark4028d ago

Ngl, I gotta push back here. Caulking after paint might bond to the surface better, but you're setting yourself up for a mess with the finish. That glossy look you're getting is a pain to fix cause now you either have to paint over the caulk twice or live with it. I've been doing trim work for years and always caulk first, then paint. The key is using a good paintable caulk like Big Stretch or DAP 230, not the cheap stuff. Those hairline cracks you mentioned are probably from using the wrong caulk or not letting it cure long enough before painting.

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