Page 2 of 2 FirstFirst 12
Results 16 to 22 of 22
  1. #16
    Join Date
    Jul 2004
    Location
    Newcastle NSW
    Posts
    0

    Default Bubble trouble

    Just as Midge says - outgassing and once you get more coats on with a sand in between and it will be great. I had exactly the same problem when coating a boat with West System (and other epoxies too).Looked like a non-skid hull! West reccommend that you coat as the temperature during the day starts to drop rather than rise to minimise the outgassing. I have also had an inapropriate outgassing after coating a deck with a decking oil no doubt for similar reasons and with a similar solution.
    cheers
    Salty

  2. #17
    Join Date
    Mar 2004
    Location
    Hornsby, NSW
    Age
    50
    Posts
    91

    Default

    I was doing some reading on applying epoxy for glassing boats. a few suggested to epoxy when the temperature is dropping. their reason was that as the timber heats up it releases air (as bubbles in epoxy), but when it cools it absorbs air (drawing the epoxy into the timbers cells. Don't know how true this is cause I havent tried it, anyone else heard of this?
    If I do not clearly express what I mean, it is either for the reason that having no conversational powers, I cannot express what I mean, or that having no meaning, I do not mean what I fail to express. Which, to the best of my belief, is not the case.
    Mr. Grewgious, The Mystery of Edwin Drood - Charles Dickens

  3. #18
    Join Date
    Mar 2004
    Location
    Hornsby, NSW
    Age
    50
    Posts
    91

    Default

    beat me to it Salty, must be that internet echo Al was talking about
    If I do not clearly express what I mean, it is either for the reason that having no conversational powers, I cannot express what I mean, or that having no meaning, I do not mean what I fail to express. Which, to the best of my belief, is not the case.
    Mr. Grewgious, The Mystery of Edwin Drood - Charles Dickens

  4. #19
    Join Date
    Dec 2004
    Location
    Toowoomba Q 4350
    Posts
    3,491

    Default

    Inlaws - hot air, huff and puff....... Yes, plenty of that coming

    Hmm, the first batch of test epoxy I applied just after mid-afternoon - very few bubbles -this was on the back and underside of the bench, just over the splits, cracks, holes - end result very few bubbles. The next day I applied it to the top of the bench - in the middle of the day live and learn....
    I'm hoping to get another coat on after 4:30 pm during the week as the weekend will be taken up with 2 bbqs, one being Midge's, so that should sort out the cooling temperature bit.

    Yep, I'm gonna have to get a dust covering on it somehow, maybe do this in hwmbo's shed instead outdoors. I wonder if I can get away with it.....

    Thanks
    RR

  5. #20
    Join Date
    Nov 2003
    Location
    Australia and France
    Posts
    2,869

    Default

    Quote Originally Posted by Slavo
    reason was that as the timber heats up it releases air (as bubbles in epoxy), but when it cools it absorbs air (drawing the epoxy into the timbers cells. Don't know how true this is cause I havent tried it, anyone else heard of this?
    Very true.

    No need to ask me how I know!!

    cheers,

    P

  6. #21
    Join Date
    Apr 2002
    Location
    Brisbane
    Posts
    0

    Default

    This stuff may be mentioned elsewhere but.
    Temperature and humidity seriously effect how this stuff performs. The stuff I used had a recomended temp & hum window fro best results. Even the small amount I have done this was aparnt. one bloke I know who used to mount posters with this stuff regularly had a "climate controlled room" (aircon & a simering sauspan) .
    It is also recomended by some to seal the surface so the air wont come out. With either "special sealer" or shelac.
    cheers
    Any thing with sharp teeth eats meat.
    Most powertools have sharp teeth.
    People are made of meat.
    Abrasives can be just as dangerous as a blade.....and 10 times more painfull.

  7. #22
    Join Date
    Dec 2012
    Location
    brisbane
    Posts
    2

    Default removing bubbles from polyester

    I have read with interest the use of a heat flame above the resin to remove bubbles apparently due to the formation of Co2.I use clear cast polyester resin, will the same technique work. I noticed most of the threads were about epoxy resin. Is there any safety issues using the system on polyester resin.

Tags for this Thread

Bookmarks

Bookmarks

Posting Permissions

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