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Latex is a natural ingredient that comes from rubber trees in the form of a milky liquid. There are thousands of species of plants that produce different types of latex, including the Chicle tree that yields the raw material for producing the rubbery material in chewing gum.
Many companies now make caulks that are combinations of latex and silicone. They are often marketed as siliconized latex or latex plus silicone.. These products offer the ease of use of latex with the added durability of silicone. Caulk comes in two forms: a cartridge or a squeeze tube.