Thanks Thanks:  0
Likes Likes:  0
Needs Pictures Needs Pictures:  0
Picture(s) thanks Picture(s) thanks:  0
Results 1 to 3 of 3
  1. #1
    Join Date
    Jun 2005
    Location
    Helensburgh
    Posts
    7,696

    Default Differences in Single Part & Two Part Polyurethane Glues

    I asked this question elsewhere but got no response, is there a difference in performance between the two?
    CHRIS

  2. # ADS
    Google Adsense Advertisement
    Join Date
    Always
    Location
    Advertising world
    Posts
    Many





     
  3. #2
    Join Date
    Jun 2015
    Location
    Mexico. Actual Mexico not Victoria.
    Posts
    418

    Default

    Yes, there is, although I doubt there is any appreciable difference with respect to woodworking.

    In a nutshell, "two pack" retains it's adhesive properties better at higher temperature. So, should you throw a glued up piece on the fire, make sure you've used two pack, lest it fall apart before it's converted into ash.

  4. #3
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    27,756

    Default

    My understanding is as foillows.
    Two part adhesives have the curing agent mixed intimately with the adhesive so there is usually a more "even curing" hence "even strength" bonding developed.
    One part adhesives usually rely on heat, moisture or air as the curing agent.
    One part adhesives that use heat as the curing agent have less problems curing evenly, but even air and moisture curing depends on the material and the depth/thickness of the joint.
    Wood joints are usually narrow and wood itself usually has enough residual moisture to enable even curing. However, a deep/thick joint in metal is probably best served by 2 part adhesive, and something like a 2 part epoxy if higher temps are going to be involved.

    There are a few other property differences other than bond strength between the two adhesive types but they nearly all come back to the even-ness of curing

Similar Threads

  1. building a vac press for veneering part 1 part 2
    By woodman12 in forum CNC Machines
    Replies: 6
    Last Post: 13th January 2014, 11:24 AM
  2. Replies: 18
    Last Post: 16th November 2013, 09:02 PM
  3. Part two of a four part series, "Routing for beginners"
    By harrysin in forum ROUTING FORUM
    Replies: 4
    Last Post: 1st February 2012, 03:07 PM
  4. Part 1 of 3 Part TV Cabinet
    By HazzaB in forum WOODWORK PICS
    Replies: 3
    Last Post: 13th June 2009, 05:15 PM
  5. Using polyurethane glues
    By greenie512 in forum WOODWORK - GENERAL
    Replies: 19
    Last Post: 25th November 2005, 10:04 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •