Some, for example WEST 105/205, are claimed to cure (eventually) at 40 F.
Most vendors will tell you their product's temp. range. I'd ask the vendor's
tech support whether cure temp affects the strength of the finished
product. It's prudent to try it out in a thin film on a scap before making
a mess on your boat that won't kick off 'til spring.

brad wrote:

Will epoxy cure at temperatures as low as 40 F.