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Expanseal 100 Polyurethane Expansion Joint Sealant
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Expanseal 100 is a heavy-duty joint sealant used in construction. Expanseal, it comes either as a single-component silane-terminated polyurethane hybrid or a two-component polysulphide seal designed to waterproof and move with dynamic building joints.
Because different brands use the "Expanseal 100" label for distinct chemical formulations, it helps to understand their core properties, uses, and differences. [1]
Types and Key Features
Costar Expanseal 100 (Polyurethane Hybrid):
Single-component, tack-free in 2 to 3 hours.
High movement capability of +/- 35%.
Paintable and permanently waterproof after curing.
Used for vertical and horizontal joints.
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