Adhesives

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

The best glues for exterior door panels that withstands heat

12/3/14       
Billy Statham Member

I have been using Dr a natational casual product and it has worked until now it is not bonding the way that I think it should the wood has been aclamated and glued in a warm environment and the last couple of glue ups the wood would break on joints with no wood breakage

12/5/14       #3: The best glues for exterior door pa ...
Gerard A. Blackmon  Member

Your posting has given me information about the glues. I was searching about it. Thanks for sharing.

12/13/14       #4: The best glues for exterior door pa ...
GeneWengert-WoodDoc

The wintertime open joint problem is the result of having wood that is not at the same MC as its environment. Usually the wood is a bit too wet or the environment is a bit too dry. Oftentimes, the dry environment is the same as the customer will have, so increasing the shop humidity is often only going to postpone the problem until the customer gets the product. So, MC of the wood is the key.

If your shop Humidity is 30% RH, measured with a digital hygrometer ($30 at Radio Shack), then the MC the wood will be trying to attain is 6% MC. If the wood is wetter, such as 8% MC, it will shrink.

Shrinkage may not be a bad thing, but when gluing two pieces together, if a gap develops of greater than about 0.006", then glue joint strength suffers. The end grain loses moisture the fastest, so often the ends are where the gap exists and so we see joint failure at the ends.

So, check the MC and insist on pieces no wetter than 7.0%. And so that there is no size change between machining the surface to be glued and the application of pressure, the time between these two operations should be just a few minutes...so that the wood does not have time to change MC and shrink.

Along with this issue, in the wintertime, we also see the pressure, put on the joint with a hydraulic clamp, for example, squeezes out the extra glue, as is suppose to happen, but then the joint loosens just a bit and with no extra glue to fill the gap, there is a failure.

12/15/14       #5: The best glues for exterior door pa ...
David R Sochar Member

Dr Gene - The OP mentioned problems with exterior doors. While I feel I understand the proper MC for interior work, what about exterior doors where we have absolutely no control over the end use environment?

12/15/14       #6: The best glues for exterior door pa ...
Gene Wengert-WoodDoc

An exterior door is really a "tough situation" as one side is exposed to a fairly dry interior (6% EMC winter and 9% EMC summer), while the outside is exposed to 12% EMC average, summer or winter (unless there is a storm door, which would dry things a bit; or if there is direct rainfall, which would set things).

The outside environmental conditions for many locations throughout the USA are given in the following publication.

www.esf.edu/scme/wus/documents/EMCofWoodFPL268.pdf

I do believe that the most advantageous procedure is to try and coat all six surfaces of the door with a good, effective vapor resistant coating (Note: this also means thick, as a good coating that is too thin does not work very well). This coating will buffer the climate differences and moisture differences from inside to outside.

12/15/14       #7: The best glues for exterior door pa ...
Billy Statham Member

One way that we control it is to use separate panels that way if there is failure the weather dose not reach the interior

12/23/14       #8: The best glues for exterior door pa ...
Larry

We use resorcinol for exterior work. Good glue but doesn't solve the moisture problem. I will no longer make exterior doors. When I did I used two separate panels separated by a sheet of plastic. Don't know if that was a good idea or not but never had a failure.

1/3/15       #9: The best glues for exterior door pa ...
Steiph Zargon Member

Seems to me there are several variables that have not been taken into account. Like.. where (on the Map of the World) are you making these doors... and where are they intended to be used?

What type of wood are you using?
What type of joints are you glueing?
Are they Flat panels or raised panels?

Are you "testing" the joints in the shop?
Or are they breaking at their final location?
Are your panels "floating" in the door frame or are you gluing them in?

... And I'm really confused as to what, "Dr a natational casual product", kind of glue you are referring to.

Certainly, moisture content (I hate those abbreviations you dudes are using) has a lot to do with the wood expanding and contracting, as the climate changes from season to season, but a properly made door with floating panels should be able to handle this unless the wood used is unsuitable for the climate.

I do know that TiteBond makes a water resistant glue and that Polyurethane glues like Gorilla Glue work well too. The downside to the polyurethane is the foaming excretion that needs to be cleaned up after it cures.

On another note... if you are using flat panels you might try using a spline joint and pining it as well. Or tongue & groove also comes to mind.

Good luck from HotLanta

1/3/15       #10: The best glues for exterior door pa ...
Gene Wengert-WoodDoc

The OP (original poster) said "Dr, a national casual", but the correct name is "DR made by National Casein". It is a UF (urea formaldehyde) adhesive used primarily for laminating. Such an adhesive has outstanding "exterior use" properties, so the problem that the OP is having is related to the surface preparation and gluing procedures and not the adhesive itself. Changing adhesives will not sure the problem as it is not an adhesive issue. This is a KEY concept in this case.

With respect to the last posting, I do wonder if a floating panel is adequate construction for an exterior door. I would vote "No."

Note that all PUR adhesives (that is polyurethane) do not foam, so PURs would be a good choice.

1/3/15       #11: The best glues for exterior door pa ...
Billy Statham Member

They are floating panels . The are raised panels , and with they weather change it takes longer for it too cure and after I let it set for 48 hours or more without stress on it it seams to be holding properly


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)