I'm thinking of putting secondary glazing into a bedroom. Could you confirm that your self adhesive magnet Code: 59057A would be suitable? I thought that this would be placed on the frame and the self adhesive magnet Code: 59057B would go on the acrylic sheet. Are the two A and B magnets opposite poles? Both strips would need to come together.
Most people use 12.5 mm or 25mm for that application. You could trial by using 59063AM and 59063BM which are the 12.5mm wide Magnafix tapes with adhesive