WalzCraft
Post a Response Subscribe Guidelines

Architectural Woodworking

You are not logged in. [ Login ] Why log in
(NOTE: Login is not required to post)

Douglas Fir Pitch/Sap

7/2/22       
gary

Not sure how many of you out there use V/G Douglas Fir but sometimes it has the bad habit of exuding a little bit of pitch/sap here and there. For interior work a coat of shellac will nip that in the bud. BUT for exterior work I am looking for something to do the same ? ( shellac isn't rated for exterior). I am thinking that perhaps a coating of West Systems epoxy ? Your thoughts would be appreciated.

7/2/22       #2: Douglas Fir Pitch/Sap ...
Mark B Member

Your likely gonna get sqwak that your DF wasnt dried/pitch-set properly and blah blah blah. You'll have to do whatever is needed to lock up the bleed. Epoxy is a good choice but hard to know youve found all of the trouble spots.

7/2/22       #3: Douglas Fir Pitch/Sap ...
nicko

I am pretty sure you can use BIN for spot priming on the exterior. I haven't read the can for a while but I am pretty sure it says that on the can.

Nicko

7/3/22       #4: Douglas Fir Pitch/Sap ...
Mark B Member

Not saying I can quote the can but you can never spot prime with BIN as it will always show through no matter how many top coats but i have no idea how that pertains to things like heavy oil based exterior top coats.
I know many many years ago we porked ourselves spot priming a greasy commerial kitchen ceiling and there was no amount of coats that would burry it (dont ask) til we primed the entire thing with BIN (smarter to begin with) and final coated.
7/5/22       #5: Douglas Fir Pitch/Sap ...
Bruce H

If the Douglas Fir sap wasn't properly set in the KD process, at some point it will come out no matter what you put on the outside.

7/5/22       #6: Douglas Fir Pitch/Sap ...
nicko

I cant recall ever having BIN flash but I have had Kilz flash. And yes it would flash no matter how many coats of paint i put on it. I just spot primed a textured ceiling that had a small spot of water damage bleed through and it did not flash after i painted it. And the Bin instructions say for exterior spot priming.

7/6/22       #7: Douglas Fir Pitch/Sap ...
BH Davis  Member

Website: http://www.bhdavis.net

Bin is just white tinted shellac. You can do the same spot priming outdoors with Bin or shellac.

Shellac does not expand and contract with wood movement and will pop if done over large wood surfaces. That is why it is only good for spot priming in exterior applications.

BH Davis

7/7/22       #8: Douglas Fir Pitch/Sap ...
Matt Calnen

If your application is stain or clear finish, I have had pretty good luck taking a heat gun and heating up the pocket and getting as much of the pitch out as you can. Then tape off and fill it with a good five minute epoxy.

7/8/22       #9: Douglas Fir Pitch/Sap ...
Joe Calhoon Member

God idea on the heat gun Matt. I will try that next time I encounter this with VG. I have had fair luck with epoxy on small pockets. Big ones not so much. It’s best to just cut them out but sometimes they don’t show up till profiling and milling. If it is paint grade a plug cutter works well to get rid of the pocket. That pitch in VG will break through any film finish.


Post a Response
  • Notify me of responses to this thread
  • Subscribe to email updates on this Forum
    • To receive email notification of additions to this forum thread,
    enter your name and email address, and then click the
    "Keep Me Posted" button below.

    Please Note: If you have posted a message or response,
    do not submit this request ... you are already signed up
    to receive notification!
    Your Name:
    E-Mail Address:
    Enter the correct numbers into the field below:
     

    Date of your Birth:



    Return to top of page

    Buy & Sell Exchanges | Forums | Galleries | Site Map

    FORUM GUIDELINES: Please review the guidelines below before posting at WOODWEB's Interactive Message Boards (return to top)

  • WOODWEB is a professional industrial woodworking site. Hobbyist and homeowner woodworking questions are inappropriate.
  • Messages should be kept reasonably short and on topic, relating to the focus of the forum. Responses should relate to the original question.
  • A valid email return address must be included with each message.
  • Advertising is inappropriate. The only exceptions are the Classified Ads Exchange, Machinery Exchange, Lumber Exchange, and Job Opportunities and Services Exchange. When posting listings in these areas, review the posting instructions carefully.
  • Subject lines may be edited for length and clarity.
  • "Cross posting" is not permitted. Choose the best forum for your question, and post your question at one forum only.
  • Messages requesting private responses will be removed - Forums are designed to provide information and assistance for all of our visitors. Private response requests are appropriate at WOODWEB's Exchanges and Job Opportunities and Services.
  • Messages that accuse businesses or individuals of alleged negative actions or behavior are inappropriate since WOODWEB is unable to verify or substantiate the claims.
  • Posts with the intent of soliciting answers to surveys are not appropriate. Contact WOODWEB for more information on initiating a survey.
  • Excessive forum participation by an individual upsets the balance of a healthy forum atmosphere. Individuals who excessively post responses containing marginal content will be considered repeat forum abusers.
  • Responses that initiate or support inappropriate and off-topic discussion of general politics detract from the professional woodworking focus of WOODWEB, and will be removed.
  • Participants are encouraged to use their real name when posting. Intentionally using another persons name is prohibited, and posts of this nature will be removed at WOODWEB's discretion.
  • Comments, questions, or criticisms regarding Forum policies should be directed to WOODWEB's Systems Administrator
    (return to top).

    Carefully review your message before clicking on the "Send Message" button - you will not be able to revise the message once it has been sent.

    You will be notified of responses to the message(s) you posted via email. Be sure to enter your email address correctly.

    WOODWEB's forums are a highly regarded resource for professional woodworkers. Messages and responses that are crafted in a professional and civil manner strengthen this resource. Messages that do not reflect a professional tone reduce the value of our forums.

    Messages are inappropriate when their content: is deemed libelous in nature or is based on rumor, fails to meet basic standards of decorum, contains blatant advertising or inappropriate emphasis on self promotion (return to top).

    Libel:   Posts which defame an individual or organization, or employ a tone which can be viewed as malicious in nature. Words, pictures, or cartoons which expose a person or organization to public hatred, shame, disgrace, or ridicule, or induce an ill opinion of a person or organization, are libelous.

    Improper Decorum:   Posts which are profane, inciting, disrespectful or uncivil in tone, or maliciously worded. This also includes the venting of unsubstantiated opinions. Such messages do little to illuminate a given topic, and often have the opposite effect. Constructive criticism is acceptable (return to top).

    Advertising:   The purpose of WOODWEB Forums is to provide answers, not an advertising venue. Companies participating in a Forum discussion should provide specific answers to posted questions. WOODWEB suggests that businesses include an appropriately crafted signature in order to identify their company. A well meaning post that seems to be on-topic but contains a product reference may do your business more harm than good in the Forum environment. Forum users may perceive your references to specific products as unsolicited advertising (spam) and consciously avoid your web site or services. A well-crafted signature is an appropriate way to advertise your services that will not offend potential customers. Signatures should be limited to 4-6 lines, and may contain information that identifies the type of business you're in, your URL and email address (return to top).

    Repeated Forum Abuse: Forum participants who repeatedly fail to follow WOODWEB's Forum Guidelines may encounter difficulty when attempting to post messages.

    There are often situations when the original message asks for opinions: "What is the best widget for my type of shop?". To a certain extent, the person posting the message is responsible for including specific questions within the message. An open ended question (like the one above) invites responses that may read as sales pitches. WOODWEB suggests that companies responding to such a question provide detailed and substantive replies rather than responses that read as a one-sided product promotion. It has been WOODWEB's experience that substantive responses are held in higher regard by our readers (return to top).

    The staff of WOODWEB assume no responsibility for the accuracy, content, or outcome of any posting transmitted at WOODWEB's Message Boards. Participants should undertake the use of machinery, materials and methods discussed at WOODWEB's Message Boards after considerate evaluation, and at their own risk. WOODWEB reserves the right to delete any messages it deems inappropriate. (return to top)



    • Forum Posting Help
    Your Name The name you enter in this field will be the name that appears with your post or response (return to form).
    Your Website Personal or business website links must point to the author's website. Inappropriate links will be removed without notice, and at WOODWEB's sole discretion. WOODWEB reserves the right to delete any messages with links it deems inappropriate. (return to form)
    E-Mail Address Your e-mail address will not be publicly viewable. Forum participants will be able to contact you using a contact link (included with your post) that is substituted for your actual address. You must include a valid email address in this field. (return to form)
    Subject Subject may be edited for length and clarity. Subject lines should provide an indication of the content of your post. (return to form)
    Thread Related Link and Image Guidelines Thread Related Links posted at WOODWEB's Forums and Exchanges should point to locations that provide supporting information for the topic being discussed in the current message thread. The purpose of WOODWEB Forums is to provide answers, not to serve as an advertising venue. A Thread Related Link that directs visitors to an area with inappropriate content will be removed. WOODWEB reserves the right to delete any messages with links or images it deems inappropriate. (return to form)
    Thread Related File Uploads Thread Related Files posted at WOODWEB's Forums and Exchanges should provide supporting information for the topic being discussed in the current message thread. Video Files: acceptable video formats are: .MOV .AVI .WMV .MPEG .MPG .MP4 (Image Upload Tips)   If you encounter any difficulty when uploading video files, E-mail WOODWEB for assistance. The purpose of WOODWEB Forums is to provide answers, not to serve as an advertising venue. A Thread Related File that contains inappropriate content will be removed, and uploaded files that are not directly related to the message thread will be removed. WOODWEB reserves the right to delete any messages with links, files, or images it deems inappropriate. (return to form)
    Related Information:
    Products: Mouldings & Millwork
    Drafting Design Services
    Knowledge Base: Architectural Millwork
    Shop Gallery

    Recent Threads at all Forums

    Sponsors

    Become a Sponsor today!