Special Formula for Stained Glass: Our liquid solder flux is specifically designed for stained glass projects, ensuring excellent adhesion and smooth soldering. The formula contains activators that not only remove dirt and excess film but also enhance the wettability of the solder, allowing for smoother flow Gentle and Non-Irritating: Formulated to be gentle, it is non-irritating to the skin, smoke-free and odorless, preventing any mess. It stays in place and does not leave greasy marks after soldering, making cleanup easier and quicker. It can be washed away with water, helping to prevent lumps during the soldering process Keep Artwork Clean: This liquid flux paste is completely water-soluble, making cleanup a breeze. It applies smoothly without dripping or loosening, and any residue can be easily removed by washing the piece within 6 to 8 hours Included Flux Brush for Soldering: Use the flux brush for easy and precise application, eliminating the need to use your fingers. This reduces dripping or sloppiness while effectively preventing splattering and bubbling Versatile Use with Multiple Metals: This handy flux paste soldering is Ideal for use with zinc, lead, and copper foil. Whether you're engaged in a stained glass project, fixing windows, or as stain glass tools and supplies, starter kit, this flux serves as an excellent all-purpose solution. It’s normal for there to be a small amount of sediment at the bottom of the bottle, which does not affect its normal use Special Formula for Stained Glass: Our liquid solder flux is specifically designed for stained glass projects, ensuring excellent adhesion and smooth soldering. The formula contains activators that not only remove dirt and excess film but also enhance the wettability of the solder, allowing for smoother flow Gentle and Non-Irritating: Formulated to be gentle, it is non-irritating to the skin, smoke-free and odorless, preventing any mess. It stays in place and does not leave greasy marks after soldering, making cleanup easier and quicker. It can be washed away with water, helping to prevent lumps during the soldering process Keep Artwork Clean: This liquid flux paste is completely water-soluble, making cleanup a breeze. It applies smoothly without dripping or loosening, and any residue can be easily removed by washing the piece within 6 to 8 hours Included Flux Brush for Soldering: Use the flux brush for easy and precise application, eliminating the need to use your fingers. This reduces dripping or sloppiness while effectively preventing splattering and bubbling Versatile Use with Multiple Metals: This handy flux paste soldering is Ideal for use with zinc, lead, and copper foil. Whether you're engaged in a stained glass project, fixing windows, or as stain glass tools and supplies, starter kit, this flux serves as an excellent all-purpose solution. It’s normal for there to be a small amount of sediment at the bottom of the bottle, which does not affect its normal use