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Thermal cracking. In thermal cracking, high temperatures (typically in the range of 450Â°C to 750Â°C) and pressures (up to about 70 atmospheres) are used to break the large hydrocarbons into smaller ones. Thermal cracking gives mixtures of products containing high proportions of hydrocarbons with double bonds - alkenes.
Caulking Choices: There are several choices for the type of caulking you may use for crack repair. Pure silicone is not recommended. acrylic / silicone blend, often referred to as paintable caulk, is a water base product and is the easiest to work with, and cleans up easily with water. For homeowner application, acrylic / silicone is mostly recommended for its ease of use while being able to achieve a good result.