Chem Link E-Curb Rectangle 4.5 in. x 3.5 in. Gray Penetration Seal Curb

The Chem Link E-Curb Rectangle is a gray molded penetration seal curb measuring 4.5 in. x 3.5 in., designed to seal pipes and penetrations through roofing membranes. Each unit is sold individually. It is part of the Chem Link E-Curb penetration seal system and pairs with compatible sealants and membrane accessories.

Key Features:

• Penetration sealing: Forms a molded curb that seals around pipes and penetrations in roofing systems.
• Rectangle opening: Rectangular 4.5 in. x 3.5 in. footprint suited to rectangular penetrations or grouped conduits.
• Gray molded body: Gray finished curb that blends with most membrane and flashing assemblies.
• System component: Part of the Chem Link E-Curb penetration seal component system.
• Single unit: Sold each, so you can order the exact number of penetrations to seal.

Specifications Table:

Coverage & How Much You Need:

One curb seals a single penetration at the 4.5 in. x 3.5 in. size; count each penetration on the roof plan and order one curb per penetration, plus spares for grouped pipes.

Fit and Compatibility:

Designed as part of the Chem Link E-Curb penetration seal system for use with compatible membrane roofing assemblies. Matching E-Curb sizes and Chem Link sealants are sold separately.

Frequently Asked Questions (FAQ):

Q: What is included with the sell unit?
A: One gray E-Curb Rectangle, 4.5 in. x 3.5 in.; sealants and membrane accessories are ordered separately.

Q: What penetrations does it fit?
A: It is sized for penetrations matching the 4.5 in. x 3.5 in. rectangular opening; other E-Curb sizes exist for different pipes.

Q: How is it installed?
A: The curb is set around the penetration and sealed into the roof assembly following the E-Curb system installation instructions.

Q: Is it for commercial roofs?
A: Yes, it is categorized for commercial membrane roofing as a specialty membrane accessory.

Q: Can I use it on round pipes?
A: The rectangle profile suits rectangular penetrations or grouped runs; check the E-Curb range for round-pipe sizes.

Expert Verdict Reviewed by the SuperArbor Pro Desk

E-Curb components simplify penetration detailing because the curb geometry does the height and shape work, letting you focus on bonding and sealing the perimeter. Verify pipe count and grouping at each location before ordering, since grouping several small conduits often calls for the next size up. Always detail the curb into the membrane field, not on top of an existing patch.

Follow the manufacturer’s installation instructions and local roofing codes when sealing penetrations, and use appropriate fall protection while working on the roof.

Order the Chem Link E-Curb Rectangle today for a clean, molded seal at your roof penetrations.