Tannin Sealer

Tannin Sealer

Tannin Sealer has excellent adhesive and sealing properties. Use on wood or Masonite surfaces where tannin, oil or pitch may bleed through paint.  Also us to adhere Gold Leaf.



  • Apply undiluted to clead, dry surface directly over and at least 0.2” (5cm) beyond knots front and back.  Do not use hair dryer to promote drying.
  • Allow to cure a minimum of 14 days depending on climate and humidity, before proceeding to paint or decorate.
  • When staining wood, stain surface first then apply Tannin Sealer as directed.
  • Tannin Sealer remains tacky when dry and cured.  Seal if desired with coat of Clear Glaze Medium or All Purpose Sealer before proceeding with basecoat.
  • On light or pickled stains or basecoats, the dark knots or tannin may show through.  The mask this, once the Tannin Sealer has cured, conceal the area with a second coat of stain or coat of Gesso.


Gold Leafing

  • Mix Retarder 1:2 with Tannin Sealer and apply a smooth coat.
  • Allow to dry to tack.  When dry, fingerprint does not remain when surface is touched.  Repeat to apply 3 coats.
  • Press gold leaf onto surface.  Rub gently with cotton ball to press into place.
  • Heat set gold leaf using a hair dryer and warm air.
  • Allow to dry overnight before buffing to remove excess leaf.  Buff the surface gently using a soft cloth or brush.
  • Seal with a coat of All Purpose Sealer to prevent tarnishing and increase adhesion prior to decorating or antiquing with Jo Sonja Matte Flow Acrylic or Wood Stain Gels.


Approximate coverage: 1 ml = 251 sq cm / 1oz = 8 sq ft.

Safe to dry with a hair dryer.

Water based, can be cleaned up with mild soap and cool water.

Conforms to ASTM D 4236 and is Non Toxic.