Bubbles in resin
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Bubbles in resin

  1. #1
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    Default Bubbles in resin

    I am in the process of doing balsa floors in my boat. I am having a major problem with air bubbles showing up in my resin, they only seem to show up in my top coat over my cloth. They seem to show up while it's curing, I am using west systems 105/207 resin and hardener combo. My garage is kept at 70 while doing fiberglass work, I have never ran into this before. Please help!

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    This is only a guess because I've never run into this problem before, but, when applying a heavy catalized resin like bar top clear, running over the surface with a heat gun or a small propane tourch will pop the bubbles. This may work in this application also.
    Rob

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    I have not tried tipping off the resin with a foam brush, I always wipe the area with acetone and paper towels to clean prior to application. I was applying 2 layers of light cloth on top and the bubbles are on top of the cloth. I will sand it back down with some 80 grit to get rid of all of the bubbles and hopefully be ready to try again next weekend. I've laid multiple other types of materials and balsa is the only one that had given me this problem.

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    I will have to allow for more time with the material to watch it and possibly use a heat gun if necessary to get it to smooth out. I tried to lay as thin of a coat as possible but apparently something wasn't right. I was using a glasskoter roller cover to apply the resin.

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    Senior Member H20MOFO's Avatar
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    I have never done glass work that I didnt have some air bubbles. 99 Percent of the time you/I can just poke at em with a bristle brush and they pop.
    Another Hot Boat refugee

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    Brian B dryhoze1's Avatar
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    Quote Originally Posted by bbfsouthwind View Post
    I am in the process of doing balsa floors in my boat. I am having a major problem with air bubbles showing up in my resin, they only seem to show up in my top coat over my cloth. They seem to show up while it's curing, I am using west systems 105/207 resin and hardener combo. My garage is kept at 70 while doing fiberglass work, I have never ran into this before. Please help!
    PM me your number. Brian

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    Senior Member OFFSHORE GINGER's Avatar
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    Quote Originally Posted by bbfsouthwind View Post
    I will have to allow for more time with the material to watch it and possibly use a heat gun if necessary to get it to smooth out. I tried to lay as thin of a coat as possible but apparently something wasn't right. I was using a glasskoter roller cover to apply the resin.
    For some odd reason you seem to have some contaminatiom going on and how are you wiping ( prepping ) the surface down prior to an application .

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    This was on bare wood that had just been sanded, acetone is the only solvent I use with fiberglass.

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    Brian B dryhoze1's Avatar
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    Or not.. Best of luck !
    Last edited by dryhoze1; 11-27-2014 at 08:21 AM.

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    Quote Originally Posted by bbfsouthwind View Post
    This was on bare wood that had just been sanded, acetone is the only solvent I use with fiberglass.
    Just curious why are you using 207 for the whole process on bare wood considering it really only need's to be used on the final coat or coat's , and not to mention that you should apply a minimum of two or three coats ( maybe more ) of Epoxy or West System to the surface ( barrier coat's ) before applying the 207 , and lets not forget that over a period of time ...............the 207 will and can yellow .
    Last edited by OFFSHORE GINGER; 11-28-2014 at 02:27 PM.

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