Has anyone used the Rapid-Set Marine-Tex for stock work? It only comes in the two tube "2oz grey" package. It is a one to one mix ratio and only has a listed five minute working time and one hour curing time. I am wonderign about its strength. The standard Marine-Tex has listed compressive(grey is stronger than white), adhesion(white is stronger than grey), and tensile(both equal) strengths but there is nothing listed for the Rapid-Set type.