Our drum type waterproof glue contains polydimethylsiloxane, methyl chlorisazolinone. It can effectively block water penetration. Its use method is very simple: 1. Keep the construction surface dry, no water stains after wearing gloves. 2. Extrude the glue, roll the waterproof glue evenly on the construction surface, and the amount is small and several times. 3. You can apply several times with a brush to make the surface even. 4. Ventilation 18-24 hours can be cured. And can withstand high temperature, low temperature.