GE Silicone II * & Masonry 100 % Silicone THREE-HOUR RAIN-READY - Caulk has to have relative quantity time to build adhesion to the surface and cure or alter adequately so it wo n't wash away when exposed to water. That if rain is in the forecast, homeowners and pros typically will have to delay or cancel a project when using most caulks. If not, the rain might the caulk away and the job will have to be redone. Silicone, so much as GE Silicone II * Concrete & Masonry, develops strength and adhesion quickly so it can be exposed to water in as lowercase as three hours. Some caulk up to 24 hours or longer before it can be exposed to water. For homeowners trying to squeeze home maintenance projects into the weekend or pros who are looking to move to the following job, GE Silicone II * can the waiting time, helping increase convenience, speed and efficiency. SUN - / FREEZE-PROOF - The outdoors of a home is to abrasive outside elements throughout the year. extremum heat, the sun 's UV rays and state change temperatures can material caulk to lose its flexibility and degrade. The perm of GE Silicone II * keeps it from breaking down so it can protect a home over time. material caulk can crack and crumble over time, leaving gaps for air and water to seep through. Those leaks can to water damage, mold growth and higher energy bills. Why 100 percent ? . Unlike material, silicone is permanently : seal -- Acrylic down in water over time. -- Acrylic becomes less conciliatory and can even freeze at moo temperatures, making it more in all probability to crack. -- Acrylic shrinks as the caulk dries. This shrinking can cracks over time. -- Acrylic hardens, cracks and crumbles over time when exposed to extremum heat and the sun 's UV rays. in USA.