Comments about System Three System Three Epoxy Resin:

I repaired a hole in the hull while it was on the trailer. Did about eight layers of glass. Good instructions and lots of information on how to fix stuff.

Comments about System Three System Three Epoxy Resin:

I use the med and it was just right for working in the shop @ 63 degrees

Comments about System Three System Three Epoxy Resin:

Not as hard as West System when cured, though this may be desirable in some applications where some flexibility is desired.

Comments about System Three System Three Epoxy Resin:

I've used System Three products for years with never a disappointment. I've used S3 to repair canoes, kayaks and small wood boats, house trim, antique newel post and a variety of woodworking projects. I weigh the resin and hardener with a postage scale and mix it in cheap paper bowels from the grocery store. I mix thoroughly for sixty seconds. Mix resin the same way every time and you'll have consistent results.

Comments about System Three System Three Epoxy Resin:

I'm using System Three Epoxy to re-sheath an old plywood trimaran. I've used it with the fast and the medium hardener. In both cases it has provided a reliable layup - the working times quoted for the product are very accurate. Good adhesion to old wood and nice finish on the final layer. Mixed with a 50/50 mix of cabosil and microballoons makes an excellent, easily sanded filler and fairing material.

I've used West System and it is an excellent resin too. The flexibility of the System Three might be better on hulls where more flex is needed. I've used the West resin on some structural elements where a stiffer resin makes more sense (i.e. daggerboard trunk and bulkheads)