Large Foam Plug, 6.5 X 8.75 In.

Discover the CMI Large Foam Vent Plug, expertly sized at 6.5" by 8.75" to seal Norwesco foundation block vents with confidence. Crafted from resilient closed‑cell foam, this plug offers a snug, weather‑tight fit while maintaining the vent's structural integrity. Its innovative split‑in‑half construction allows two halves to work together on a single vent, delivering reliable protection without compromising airflow.

Why choose this foam vent plug? The durable material resists moisture, rot, and pest intrusion, extending the life of your foundation system. Installation is straightforward—simply insert the halves into the vent opening and they lock in place, saving you time and labor.

• Precision dimensions (6.5" x 8.75"): Engineered to match Norwesco vent specifications for a perfect seal.
• Split‑half design: Two interlocking pieces cover one vent, simplifying placement and ensuring even pressure distribution.
• Closed‑cell foam construction: Provides superior water resistance and thermal insulation for basement walls.
• Durable and pest‑proof: Prevents insects, rodents, and debris from entering the vent cavity.
• Easy, tool‑free installation: No adhesives or fasteners required—just press the halves into the opening.

Upgrade your foundation protection today: CMI's large foam vent plug combines robust performance with hassle‑free setup, making it the ideal choice for contractors and DIY homeowners alike. Trust this plug to keep your foundation dry, insulated, and free from unwanted critters, while preserving the essential ventilation needed for a healthy structure.