The fiberglass rope may be too thick on the lid (or not). Most of them are for fireplace/wood burning stove lids. If it is, you can order some self-adhesive felt from any place that sells the Big Green Egg. It works really well, I use it on my pull-behind smoker, and that sucker is massive. Get the felt for the large egg and you should have plenty. I think its about 12 bucks.