UGL® Glazol® Glazing Compound is specially designed to create a watertight bond between glass and wood, glass and metal sash and glass and doors. It forms a cushion against shock and vibration when used in replacing broken glass and is ideal for use as a knife-grade caulking compound. Use it to set plumbing fixtures and fill cracks and nail holes in wood siding. UGL® Glazol® Glazing Compound offers year-round workability, remaining pliable while resisting chipping and cracking.