Consistent Inside Corner Sealant Application The HYDRO-BLOK® Corner Putty Knife is a disposable application tool designed to spread sealants and create clean, consistent inside corner joints. Its shaped profile helps distribute sealant evenly while maintaining a uniform bead for waterproofing and sealing applications. Lightweight Polypropylene Construction Manufactured from rigid polypropylene plastic, the putty knife provides a lightweight, easy-to-control application surface that helps installers maintain smooth sealant coverage without excessive buildup or uneven joints. Compatible with Waterproofing Sealants Designed for use with HYDRO-BLOK® Joint Sealant, the Corner Putty Knife is also compatible with other similar sealants used during shower construction, waterproofing installations, seam treatment, and general sealing projects. Disposable Jobsite Convenience The disposable design eliminates cleanup after use, making it a practical option for professional installers looking for consistent results while reducing maintenance between applications.