Which material is commonly used for seal-type expansion joints and is made of polychloroprene?

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Multiple Choice

Which material is commonly used for seal-type expansion joints and is made of polychloroprene?

Explanation:
The material used for seal-type expansion joints is neoprene, which is polychloroprene. This polymer is favored because it stays flexible and recovers well under compression as the bridge moves, even across wide temperature changes. It also resists water, oil, chemicals, and weathering, giving a durable, watertight seal over decades. Nosing, overlay, and overdriving are not materials for joint seals—they refer to features or actions rather than the seal material.

The material used for seal-type expansion joints is neoprene, which is polychloroprene. This polymer is favored because it stays flexible and recovers well under compression as the bridge moves, even across wide temperature changes. It also resists water, oil, chemicals, and weathering, giving a durable, watertight seal over decades. Nosing, overlay, and overdriving are not materials for joint seals—they refer to features or actions rather than the seal material.

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