Sikaflex 1A is a premium grade, high performance, moisture cured, 1 component, non-sag elastomeric polyurethane sealant for forming permanent, water and weather resistant seals in exterior gaps and joints. 
Sikaflex 1A is excellent for small joints and fillets, windows, door frames, reglets, flashing, roofing detail applications, and many construction adhesive projects. 
Sikaflex 1A can be used in both vertical and horizontal joints where the maximum depth of sealant is 1/2 in or less.