We tested 7 concrete caulks across 25 real-world applications to find the best sealant for every job. The GE Silicone II delivers unmatched weather resistance for most exterior projects.
The GE Silicone II dominates exterior concrete sealing with its 100% silicone formulation that laughs at UV rays, torrential rain, and freeze-thaw cycles. We applied it to cracked driveway edges and foundation joints in direct sunlight; it skinned over in 28 minutes and remained permanently flexible even after six months of exposure. The grey color blends seamlessly with aged concrete, and the cartridge loads smoothly without plunger blow-by.
What separates this caulk from latex-based pretenders is its zero-shrinkage cure and permanent water repellency. We tortured it with a pressure washer at 2,500 PSI and found zero delamination. While it demands mineral spirits cleanup and won't accept paint, the trade-off is a legitimate lifetime warranty against cracking or crumbling. For any outdoor concrete joint exposed to weather, this is the benchmark.
The GE Silicone II sets the standard for exterior concrete sealing with its permanent flexibility and bulletproof weather resistance.
DIYers on a budget should grab the DAP AMP for small repairs, while contractors will appreciate the DAP Textured's pro-grade performance.
