After trying this "water sealant cartridge," I was extremely disappointed. The product claimed to protect against water, but it didn't hold up in industrial and scientific applications. The consistency was too thin, causing it to drip and run. Additionally, it took a ridiculous amount of time to dry, and it still didn't provide the promised protection. The only pro was the ease of application with the cartridge system. Save yourself the hassle and invest in a different product.