Fish220sr

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  • Soundown recommends a system that they sell, metal spikes with metal pads that you epoxy to whatever substrate you have.

    Based on some past experience, the foam side of the Soundown does not accept adhesive well, it tends to soak it up pretty well, more than I expected, so I have chosen a different path. I made a subassembly of Soundown and a thin rigid foam board that has a smooth surface and then bonded it to the underside of the hatches.

    I cut the Soundown to fit the rigid foam board. I dry fit both pieces together and then glued them together in my shop. I used 3M 77 spray adhesive, very heavy coat on the Soundown foam and on the craft store foam, it is contact cement so you have to place it correctly the first time, no going back. I let the rigid foam/Soundown cure for two days. I then used liquid nails construction adhesive to bond the rigid foam/Soundown assembly to the underside of the hatch. I let that cure for a day. It has worked well so far, two years in.
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