what can i do to get my seatpost to stop sliding down into the seat tube?
i've got a merlin ti frame. i had a ti seatpost which gave me this problem, recently upgraded to a carbon post, same issue. the sliding into the seat tube motion has also scratched away the top coating of clearcoat?/enamel? off the post, i've tightened it fairly well, but i fear if i go any further i may crack the post. also... i'm not super overweight, 170lb, so i don't see my bodyweight really being an issue...

is there some sort of adhesive i can use that won't effect the post or the frame?

thanks in advance for any input.