Sikaflex 1a Arctic Overview Written by J. S. Goray on March 4, 2020. Posted in Educational https://www.youtube.com/watch?v=2TickNCvuqk&t=48s Sika has introduced a one-part polyurethane sealant designed for cold-weather applications. This would be perfect for year-round precast work. Visit Sika's sealnts page HERE. Learn more about our sealant services HERE.