Presto exhaust assembly paste is a putty-like paste for sealing joints in the exhaust system, eg sleeves, clamps and clips. Specifics: putty-like sodium silicate based paste for long lasting sealing of exhaust parts. Simple and easy to use and quick to disassemble. Chemical data: base: sodium silicate, form: paste, colour: dark grey, odour: almost odourless, temperature rating: up to 700°c, application temperature: 5°C up to 30°C - best results at room temperature, pH: 9.8, Density at 20°C: 1680kg/m³ ±20 kg, solid content: 71±1%, shelf-life: 12 months in appropriate storage (10-25 °C, relative humidity max 60%), container/ contents: 60g tube.