[MassHistPres] Fwd: water sealant / primer

[heartwood restoration]

thanks for sharing, garrett...excellent topic!

we apply a 50/50 mix of boiled linseed oil and turpentine to the entire window sash once the paint has been removed...it is one of the most satisfying tasks to introduce this oil to old dried wood especially the end grain...i swear the wood is grateful for the much needed 'drink'...we have not yet registered the name 'blopentine' but that's what we call it around the shop...

most blo found in hardware and paint stores is treated with metals such as cobalt to acheive the thinning/drying process for raw linseed oil rather than heating it....i have found a gentleman in trumansburg, new york who cleans and heats raw linseed to make the old traditional 'boiled' linseed oil http://www.triedandtruewoodfinish.com/ ...i have found two outfits that sell clear, clean balsam turpentine in PLASTIC containers... http://www.tarsmell.com/turpentine.html and http://www.recochem.com/us/index.php/products/solvents/paint_thinner/item/pure_gum_turpentine distributor in toledo, ohio) ...metals tend to deteriorate turpentine and the plastic containers are recyleable...

boiled linseed oil conditions and consolidates old wood and offers some water repellancy...turpentine has mildewcide and fungicide properties and, at one time, was a popular household topical remedy...we use a penetrating oil primer and prefer oil paints to latex--just not ready to make a wholesale switch to waterbased finishes!!

thanks again...
....jade
heartwood window restoration
  ----- Original Message ----- 
  From: Garrett Laws 
  To: masshistpres at cs.umb.edu 
  Sent: Saturday, August 06, 2011 11:14 AM
  Subject: [MassHistPres] Fwd: water sealant / primer


  Attached is a recommendation for a "water repellant preservative" I received from a client in Brookline, MA. The National Park Service is supposedly where he discovered it. 

  Trim on the exterior of his house looks NEW (although it is 100+yrs old) after this product, a good primer and then good paint were applied six years ago. 

  Garrett

  ---------- Forwarded message ----------
  Date: Monday, June 20, 2011
  Subject: water sealant / primer
  To: Garrett Laws <copperandslate at gmail.com>

  HI Garrett,

  Water repellent preservative (WRP) undercoating seems to have the best percentage improvement on woods such as fir or pine that don't necessarily take paint very well.  Apparently lots of window mfrs pretreat their products this way.

  Here is a link on Amazon to the product I use.  It is a water repellent preservative that is formulated to be covered with paint, which means the waxiness is lower than stand-alone products.

  I sand wood with very coarse paper before treating and painting - I think I used 60 grit. You have to be sure to follow directions for WRP, really focusing on end grain and be sure to give it ample drying time before applying paint.  I used an alkyd primer followed by two or three latex topcoats.  I've been sensing that people are now getting equally good if not better results with latex/latex applications and also that the new primerless latexes are very promising.  We used them on the barn and they are very thick - they are meant to be applied more thickly than conventional paint.

  Mill glaze can mess up a good paint job, and it's not that easy to get rid of it.  Only other thing that messes people up is allowing the wood (or primer) to weather before painting.  Even two weeks of exposure to UV rays damages the surface of bare wood causing poor paint adhesion.  You have to resand if that happens (reprime also if you had prematurely primed) .

  http://www.amazon.com/Woodlife-Classic-Wood-Preservative-00903/dp/B000C029TI





  -- 

  Cheers,
  Garrett

  The Copper & Slate Company, Inc.
  Fine Roofing and Exterior Finish Carpentry
  238B Calvary Street, Waltham, MA 02453
  (781) 893-1916

  What we do:
  http://picasaweb.google.com/copperandslate

  Where we've worked over the years:
  http://maps.google.com/maps/ms?ie=UTF8&hl=en&msa=0&msid=206210316541901083869.00049065ef8543e1ef9c3&ll=42.40115,-71.126862&spn=0.125241,0.289421&t=h&z=12



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