Kevin- If you are bonding to the rigid portion of a rigid-flex pwb, then silicone RTV, with proper surface preparation of the PWB, should work. RTV is compliant enough to prevent excessive stressing of the LED. Dow Corning 3140 RTV, used in conjunction with the corresponding primer (DC 1204 or 1205) as a pretreatment can be used. Contact Dow Corning At: *Authorized Distributor: 800-248-2481 *Product Data Sheets by Fax: "Select A Fax", 800-443-2932, enter literature code "17" Michael Alderete [log in to unmask] ______________________________ Reply Separator _________________________________ Subject: Adhesive query Author: [log in to unmask] at _internet Date: 4/18/96 9:34 AM I am trying to glue an LED to a piece of flex circuit board. Could someone recomend an adhesive which bonds well to kapton film, so far I have not had much success. Thanks Kevin Kirmse, PhD EE [log in to unmask]