Assuming that flowable is compatible with your yoyo, the amount of time the response lasts should be similar to a pre-made response pad. Depending on how you play, this could be shorter or longer. Also, you need to let the silicone cure for the full 24 hours before playing it. It DOES make a huge difference. Longer is fine, but really, anything longer than 30 hours is most likely a waste of time. 27 hours is even pushing it. 24 hours seems long, but it’s not that bad.
For me, assuming non-stop heavy play, a set of YYJ o-ring silicone response pads will last me 3-4 months per pair. Using flowable, I get close to those numbers, but not quite. However, if I use flowable in an off-string, I tend to have poor results, but I think that’s because in an off-string with things like open-whip binds, we’re asking a lot more out of our response pads. I siliconed my Fiesta XX and that job got yanked out within 4 days, but they came out clean. I think partially due to the fact that the yoyo is celcon had something to do with it.
I have siliconed 5 of my 7 Classics. 2 of them see heavy play. I have Classics set up differently. I need 2 more Classics, which will use response pads and one will be slim bearing and the other YYJ Speed bearing.
Also, factors such as “did you recess it” and what kind of string you use also play factors. Rougher string will wear the response pad faster. If you failed to recess it, it’s possible the string could tear tiny bits out, but this won’t be immediately, it will be more as the flowable is starting to wear out and is breaking down. Usually this only happens when you do a bad job with bubbles in it.
As I am rotating around a large collection, responses last a long time.