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Menco Mile High Backer Rod (Closed Cell)
MENCO Mile High Backer Rod (closed cell) A soft, flexible, compressible (like open cell, yet has been extruded to repel moisture), and non-gassing rod. Easy to fit in various size joints because of compressibility. Used in expansion and contraction joints to control sealant application. (Many builders of the Swedish cope style use it as an internal seal.) Manufactured to exceed 1990 Clean Air Act requirements. Polyethylene material
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