I have an Apple Watch SE 40mm that had a very cracked screen after falling on a tiled floor. Gift from my daughters for father's day, ouch!
Reputable service wanted 140.00 to replace the screen. I got cheap and got a kit on Amazon that had a screen with digitizer. Looked at videos on Apple Watch SE screen replacements on YouTube. Some great, & some bad. Watched over and over again the good ones.
Was able to get the screen off using heat gun. Released the latches and gently removed the three ribbon cables. Removed the adhesive strip that was kind of clear in appearance. Saw a light brown strip in the channel around the base of the watch. Thought it was part of the adhesive and pulled it out. Then I thought, sh*^t, was that the Force Touch Gasket! To make matters even worse the two ribbon cables on each side tore. I think they insulate the signals?? Looks like my beloved SE is toast thanks to me being a bone head! Should have sent it in for 140.00!