I am considering using Ekofill primarily because I do not have a place to store my canoe for the length of time it takes for the regular filler to dry. However, a local restoration pro suggests that it will not hold up to wear and tear nearly as well as the rock hard silIca, but has not used it. Also, Jerry Stelmok who has written several books on the subject has never even heard of Ekofill...?? I would love to hear from someone with some actual experience with the product.