The All Purpose Caulk Mastic Silicone Sealant by Tool Bench Hardware is a versatile product perfect for various sealing and bonding tasks. With a convenient 4.5 fl oz unit size, this white sealant is ideal for both indoor and outdoor use. Its silicone formula provides a strong and durable seal, making it a reliable choice for professionals and DIY enthusiasts alike. Whether you need to seal a gap in a wall or a gap in a pipe, this all-purpose caulk is a must-have in any toolbox.