Permanently Treat Your Exterior Wood

"PetraWood is the perfect ONE-TIME treatment for your exterior wood."

PetraWood is a nontoxic, nonflammable, penetrating alkali activated silica aero gel. PetraWood seals, waterproofs, and hardens wood products.

The proprietary catalyst in PetraWood reacts with both the acids and the alkali present in most woods forming an internal seal and barrier against water and other causes of deterioration.

PetraWood will not permanently alter the color, texture, or any other physical characteristic of the natural wood to which it is applied.

PetraWood provides a prepared surface 300% more effective in the bonding of varnish, stains, paint and mastics.

PetraWood is effective whether applied on surfaces which will be above or below grade.

About the Picture of the 4 x 4 Post Above

The 4 x 4 redwood post showing in the picture above was treated when new. It was part of the railing on a walkway over an irrigation ditch, under willow trees in Wyoming. After 3 years of NO maintenance work at all, I washed the right side of the post with just cold water from a pressure washer. You can see that the oxidized and mildewed coloration on the left was totally removed and the wood looks like new. The color of the right side of the picture is enhanced because the wood was still wet when I took the picture. But when it dried, it returned to the color of new untreated redwood.

The important point is: no additional PetraWood needed to be applied because it is PERMANENT. So in order to keep the wood in good shape, it just requires occasional cleaning with water and you NEVER have to add more material.

This is the cheapest and easiest way to keep exterior wood from deteriorating. It is not a wood finish...but rather an "internal" protector. PetraWood does not work until it gets 1 or 2 mm down into the wood. So the top about 1/16" of the surface has no product in it. Thus, you can apply other finishes over it IF you are mainly concerned with cosmetics and are not satisfied with the natural look of wood.


  • One-time application... does not have to be reapplied.
  • Hardens and internally waterproofs wood
  • Leaves clear, natural look with no surface film
  • Retards penetration of grease, oils and acids
  • Petrifies the wood
  • Retards weather related deterioration
  • Enables easier ice and snow removal
  • Fire Retardant Result


  • Decks
  • Fence Posts, Rails and Slats
  • Siding and Shingles
  • Cedar Shakes
  • Window Boxes, Frames and Sash
  • Wooden Planters
  • Wooden Benches

Please contact us for more information:

Last Updated Dec 2005 DBA is a Bartimaeus Enterprise.
� Copyright 2000, 2001, 2002, 2003, 2004, 2005 Bartimaeus Enterprises. All rights reserved




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Agricultural Applications

Prevent New Barn Syndrome

Permanently Treat Your Exterior Wood