Joined: July 2004
||Posted: 18 May 2017,09:32
As inconvenient as it may be, KDS is still the right choice. It's cheap, it matches everything else, it fills gaps of any width.
You seem to be looking for a bound material that will go back into place once the covers are replaced, but to achieve that, you need a bound material that is bonded to only one side of each joint. That would require the unbound edge to be coated or protected in some way to prevent a bound material adhering to it. This *can* be done, but it's difficult and, IMO, more trouble than it's worth.
And then there is the problem with blown-in detritus. This fine particulate matter will get into the gap between the bound jointing and the unbound edge, effectively re-creating a loose-fill joint.....and you're right back where you started, having a joint that is held by loose fine material and will put up resistance to being separated.
You might be better off considering bespoke compressible plastic/rubber fillets that could be attached to one edge of the joint with a strong adhesive. When the covers are replaced, the fillets would be compressed to fill the joints once again.
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