Epoxy Specs

[johnnythefish]

Can someone in the know give me their thoughts on using this as a boat building epoxy - it’s all I can get locally…

 

[BoatBuildLog]

I’d be cautious with this one. The data sheet seems focused heavily on concrete coatings rather than marine laminating. I’d want confirmation from the manufacturer that it’s suitable for fiberglass layup and continuous marine exposure before building with it.

 

[Tops]

I would do three things:

1. Compare datasheet values from the unknown epoxy to a known epoxy. It is best if the epoxies were tested to the same method and in the same units.
2. Get a small sample and try it with the intended materials. This will give first person experience with how it mixes, flows, smells, sets, sands...
3. Contact the manufacturer and ask any questions you feel have not been answered in the literature or test run.

I have an epoxy in my cupboard that is a beautiful 2:1 water clear low blush. The downside is that the cure time is quite long, from not sticky to hard enough to sand is 1+ days in warm temps. It also stops curing below 15C / 60F. I have another 2:1 that has a short working time and is sandable in about 8 hours but costs 3 times of the first epoxy. The datasheet numbers are similar enough that I use them interchangeably based on the speed of cure I am looking to achieve.

 

[johnnythefish]

Thanks. I have tried a piece of glass
. It wetted nicely. Will see what it’s like when cured.

Alternative is this …