Re: Howdy

Posted by BH On 2013/11/17 14:36:47

I'm no expert on POR-15, but have a fair amount of experience with it (and some mixed results along the way).

POR-15 is an air-dried coating, but moisture - in the form of humidity - helps cure and strengthen it.

Compared to my experience with paints, POR-15 seems rather slow to skin over. The supplier describes its tacky state as "dry to the touch, with a slight finger drag", but it has only just begun to cure at that point. In my experience and working outdoors, it doesn't reach that tacky state until about 3 hours after initial application - longer indoors. Ambient humidty is a factor.

I consider the 2-5 hour span is a more of a window of opportunity where the product can be recoated (the supplier recommends at least two coats) without tearing up the basecoat.

After that, the surface would need to be scuffed up well enough to provide sufficient tooth for recoating. (Topcoating with paint is a whole 'nuther matter best left for another time/subject.)