Seal -- Heidi Klum's Still Wrapped Around My Finger

Seal refuses to give up on his marriage -- wearing his wedding ring out in L.A. today ... despite Heidi Klum's plans to divorce him.

Seal braved the rain in a dark gray suit on his way into a studio moments ago ... two days after TMZ broke the story his wife's calling it quits.

As we previously reported, Seal is scheduled to tape a segment for Ellen later today to promote his new album. He's expected to give an interview as well as perform. No word on whether the subject of divorce will be off limits.