Klose Kaulk Bent Extension Caulking Nozzle. The permanent bend in the Klose Kaulk shell enables you to reach into tight corners, around corners or in any tight spot. The black shell comes apart in two pieces and the white tips are easily replaced. The Klose Kaulk is threaded so that it can be screwed onto the tip of the caulk tube for a secure seal. Designed for use with standard 10 oz threaded caulking or sealant cartridges. Replacement disposable nozzles available.