CarbonBond- pourable transom compound

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

  • Pourable Compounds

    Votes: 1 100.0%
  • Marine Plywood

    Votes: 0 0.0%
  • Cooga Board

    Votes: 0 0.0%

  • Total voters
    1

CarbonBond

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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 http://www.carbon-core.com/carbonbond-transom.htm

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.
 
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.
 
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

 
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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