What is it? It’s a liquid rubber sealant that seeps into cracks and holes to seal out air and moisture.
What does it claim? It claims to stop leaks fast and be the easy way to coat, seal and protect.
The product claims to work fast but the instructions don’t say how fast. Depending on the leak you’re trying to seal, you may have to wait a while for it to dry or put on several coats to ensure a solid, lasting seal.