<< Rob writes, What other gap filling - methods are used to to repair soundborad cracks? >> I have used Thermoset #600 general purpose resin with #66 variable flex hardner from Meyer Plastics. The resin and hardner may be mixed in a 1:1 ratio by weight and a dry powder stain mixed in to alter the color, such as "wheat" from Mohawk or other colors to match the color of the board. Note: a small amount of powder stain works best add only small amounts at a time. You may want to sift and use mortar & pestle if the powder is lumpy. This is a very slow cure epoxy approx. 24 hrs. A heat lamp may be used to help the flow of the epoxy and may reduce the cure time, but also reduces working time. I have used this product for some bridge repairs as well as soundboard repair. It is particularly useful for soundboard splits under a bridge. It is available in one quart containers. ( the containers need a little re-design) and should be stored cool & dry shelf life 6mos or more if you can keep the air out. I like the variable flex qualties of this product. McCall Enterprises also carries Thermoset #103. 614-898-9497/ 6187 Bellmeadow Dr. Columbus Ohio 43229 Meyer has a full line engineering adhesives catalog /30 pages. Meyer Plastics PO Box 20902 Indianapolis, IN 46220-0902 1-800-968-4131 fax 317-252-4687 Mark Ritchie RPT Cols OH
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