Historical clue formulations

• Tile adhesive — 2016-10-25
• Resin in varnish — 2012-10-30
• Resin used in varnishes — 2011-03-19
• Tree that yields a chewable resin — 2008-11-08
• Varnish resin — 1999-06-03
• Resin used in varnishes — 1998-03-28