Originally Posted by PAR
... Barnie, without a full dissertation of common epoxy formulations, you will be helpless to fully understand the typical combinations of materials ...
... The 10 times factor if of the reinforcements used in both pre-thickened epoxies and primers (paint). Shredded cotton is a common reinforcement used in textured, hard coatings (some paints or as a fillet material in epoxy). Yep, that's right shredded bits of tee shirts. How much do you think a cup full of shredded tee shirts cost? How much do you think you pay for this material, when it's used in epoxy or a paint?
I would not jump to conclusions. Some sailors ARE educated in boat building even though they might be posting
on a cruising forum.
If you say International adds shredded T-shirts to epoxy then you probably say what you know but this information is not contained in product datasheets which I read. I cannot tell you what they add, but they claim to add i.a. rust inhibitors.
I think the 10-times factor simply is not correct as much as your reasoning is correct. The factor is there, just maybe it is not 10.
I too think large custom support blocks would be difficult but then again they are still a nice option for someone whose boat goes always to the same boatyard. Some boatyards
will store small quantities of sailors stuff esp. those that cater for the local sailor.