Jorgen - thanks for confirming Sabre used 3M Hi-Strength 90 on the headliners. It explains why the foam separated from the plywood substrate! Only the 3M Hi-Tack 76 is approved for bonding to polyethylene.
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I second Dave¡¯s recommendation for using Sailrite. Excellent selection and DIY advice.?
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Jeff Boyle
Daystar S425 #79
Chicago, IL
Jeff Boyle