Thread: Joint gap filling suggestions

Hi, I have made a record shelf from vic ash and it was a long and tiresome process. Basically it consists of two rectangular boxes hand dovetailed on all corners (it's 45mm thick), the rectangles are then cross-half-checked into each other at 30degrees to make a big x shape. Stupidly I didn't think ahead and consider that the records on the lower side would be ruined from the compression so I routed a groove top and bottom and slotted in two lengths of spotted gum decking board (one for front and back) which i had laying around to divide each arm of the x into 100mm wide sections. Over time, gaps have opened up in the joins between the light and dark timber. I guess each has a different reaction to changes in moisture content. Does anyone know of a suitable product to fill the gaps and stop this from recurring next winter without noticeably standing out on either of the contrasting coloured timbers? Let me know if that's^ confusing and I will post a pic. Cheers, Brendan.