Loctite PL Window Door & Siding Polyurethane Sealant is a premium quality commercial grade sealant developed especially for forming permanent, water and weather resistant seals in most exterior gaps and joints. This sealant exhibits outstanding durability, tear resistance and a movement capability of 25% which accommodates construction material movement to protect the original seal. Loctite(TM) PL Window Door & Siding Polyurethane Sealant is UV and ozone resistant, and does not soften in the sun. It is also CARB (California Air Resources Board) compliant.