Hello everyone, welcome to our science education mini-class! Today, we'll discuss the role of rosin in waterproof adhesives. As we know, rosin offers excellent bonding properties and strong preservative effects. Adding the right amount of rosin to waterproof adhesives enhances bonding strength while improving the material's water resistance and aging resistance. This combination makes the product widely applicable in construction, home repairs, and other fields. Now, do you understand why rosin is added to waterproof adhesives? Hope this little tip helps you better understand the materials science in our daily lives! If you enjoyed our video, please give it a thumbs up and subscribe!