CarbonBond- pourable transom compound

Discussion in 'Materials' started by CarbonBond, May 9, 2018.


What is your preferred material to repair a rotted out transom?

  1. Pourable Compounds

    1 vote(s)
  2. Marine Plywood

    0 vote(s)
  3. Cooga Board

    0 vote(s)
Multiple votes are allowed.
  1. CarbonBond
    Joined: May 2018
    Posts: 3
    Likes: 0, Points: 1
    Location: Troy, VA

    CarbonBond New Member

    Hey everyone!
    If you want the easiest, strongest, and best product to repair your transom with, take a look at CarbonBond Pourable Ceramic Transom compound, and read some of the technical data here.

    Carbon-Core CarbonBond Transom Compound | Lightweight Composite Honeycomb Core Materials and Structures

    Our product uses high strength ceramic microspheres and premium polyester resins that form an excellent bond to all skins, even when all the old splinters of plywood can't be removed. It contains a self-degassing agent to remove bubbles and air pockets, and will outlast everything else on your boat.
  2. gonzo
    Joined: Aug 2002
    Posts: 16,575
    Likes: 1,558, Points: 123, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    Compression strength is only one of the parameters that are important for a transom. What are the values for tension and shear, which will represent failure modes? Also, if you pour any substance into a cavity full or rotted wood and water, it will be a poor repair.
  3. CarbonBond
    Joined: May 2018
    Posts: 3
    Likes: 0, Points: 1
    Location: Troy, VA

    CarbonBond New Member

    General & Mechanical Properties
    Color Grey
    Gel Time 18-24 Minutes
    Weight per Gallon / Liter 7.1-7.3 lbs / Gallon or 0.85 kg / Liter
    Working Time (1" thick @ 88F Shop Temp) 38-52 Minutes
    Peak Exotherm 150-180F
    Tensile Elongation (ASTM-638-82) 9.14
    Tensile Strength 1594 psi
    Viscosity @ 2.5 rpm 85,000 min. cps, 105,000 max. cps
    Viscosity @ 20 rpm 25,000 min. cps, 38,000 max. cps


  4. PAR
    Joined: Nov 2003
    Posts: 19,133
    Likes: 497, Points: 93, Legacy Rep: 3967
    Location: Eustis, FL

    PAR Yacht Designer/Builder

    Tensile strength of plywood is usually in the 4,000 to 5,000 psi range, which is considerably higher than your product and I think you've listed the incorrect ASTM reference number. You may want to go back and have a better look.

    There are a number of ways to fix a bad transom core. Pour-able products require a sealed cavity, in which to pour their product, which is fine, but most transoms don't have a continuously enclosed core, meaning you have to temporarily seal it, with the potential for leaks of a heavy, quickly getting hot liquid leaking out. Cost effectiveness isn't nearly as good as simply replacing the plywood and offering another 30 years of service to the boat, but to each his own . . .
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