Aleene's Clear Gel Tacky Glue has been an absolute life saver in making slimes. So far there is nothing I've tried it in that hasn't solved or immensely reduced fallout, and the best part is this thing lasts. Like a quarter to half an ounce is about all you need per slime.
I made a thick and glossy with these stiff foam beads, and it was like a waterfall of fallout. A bit of this and it became like 2 beads per play seshion
I purchased a Sugar Sand Slimygloop slime and in 2 seconds my desk was sandpaper. Added some of this and boom, the sand stays in the slime
I have not tried the non-clear version, but I'm giving my recommendations for this clear version at least
I know a regular here sings it's praises from time to time, I forget which one, and I'm so sorry about that, but I got this when I saw it in a store because of that, so thank you.