Caulks and sealants fill small gaps, seams, and joints around building and fixture components to form a strong, flexible bond that provides a finished look, seals out moisture and pests, and protects against the elements to improve energy efficiency. Silicone caulks and sealants provide a waterproof seal that remains permanently flexible in the most common indoor and outdoor applications. Polyurethane caulks and sealants form a waterproof and tear-resistant bond that remains permanently flexible for outdoor applications. Acrylic latex caulks and sealants form a flexible bond that is suitable for applications that require painting. Hybrid caulks and sealants combine multiple base materials, such as silicone and polyurethane, to take advantage of each material's unique properties. Hybrid caulking strips, cords, and compounds can be applied by hand without the use of a caulking gun or hand tool.