ProSeal Pipe Penetration Seal

Tamlyn ProSeal PB-12-134 — Water-Tight Pipe Penetration Seal for Exterior Wall Systems

The Tamlyn ProSeal (PB-12-134) is a flexible, pre-formed penetration seal engineered to create an instant, water-tight barrier around pipe and HVAC penetrations passing through exterior walls and cladding systems. Designed for the Set A pipe range of 1/2" to 3/4", with Ring 1 accommodating 1" to 1-1/4" and Ring 2 accommodating 1-1/2" to 1-3/4", the PB-12-134 covers multiple common pipe sizes in a single unit. It is suitable for use across a wide range of commercial and residential building envelope systems where reliable moisture management at penetration points is critical.

Unlike field-fabricated or caulk-only penetration solutions, the ProSeal features a patented central seal surrounded by either a breathable or non-breathable membrane, allowing direct integration into any building wrap or water-resistive barrier system. Built-in score lines eliminate the need for multiple SKUs to cover adjacent pipe sizes, reducing waste and simplifying inventory on multi-trade jobsites.

Key Features & Benefits

Patented Central Seal Design

The engineered central seal creates a reliable, water-tight fit around pipe and HVAC penetrations without requiring additional sealant at the penetration point. This eliminates a common failure location in building envelopes and ensures consistent performance across installations.

Score Lines for Multiple Pipe Sizes

Pre-scored rings allow a single ProSeal unit to accommodate Set A (1/2"–3/4"), Ring 1 (1"–1-1/4"), and Ring 2 (1-1/2"–1-3/4") pipe sizes. This reduces the number of SKUs required on the job and allows trades to size the seal on-site to match the actual penetration.

Breathable & Flexible Membrane

The surrounding membrane is available in both breathable and non-breathable configurations, allowing the ProSeal to integrate correctly with the specific WRB or house wrap system specified for the project. The flexible material conforms to uneven surfaces and accommodates slight misalignments in the penetration location.

Easy Installation — Instant Seal

The ProSeal slides directly over the pipe or HVAC penetration to form an immediate seal, without mixing, curing time, or specialized tools. This dramatically reduces installation time per penetration compared to tape-and-sealant methods, especially on projects with high penetration counts.

Integrates with Any Building Envelope System

The membrane flange bonds to standard building wraps, housewraps, drainable wraps, and self-adhered WRBs, including other Tamlyn system products. This ensures the penetration detail is fully tied into the continuous air and moisture barrier rather than relying solely on the seal at the pipe interface.

15-Year Limited Warranty

The Tamlyn ProSeal carries a 15-year product-only limited warranty against manufacturing defects when installed per Tamlyn's published installation guidelines. This provides documented protection for the building owner and reduces callback risk for the installer.

Common Applications

Plumbing Pipe Penetrations Through Exterior Walls

Seals supply and drain lines — including 1/2" and 3/4" supply piping — where they exit the conditioned envelope through exterior sheathing and cladding, preventing water intrusion at one of the most common envelope breach points.

HVAC Line Set Penetrations

Accommodates refrigerant line sets and other HVAC service penetrations through exterior walls, providing a durable seal that remains flexible through seasonal movement and vibration from mechanical equipment.

Electrical Conduit Penetrations

Suitable for sealing smaller electrical conduit runs through exterior building assemblies where maintaining the continuity of the WRB layer is required by code or specification.

Commercial Building Envelope Systems

Engineered for integration into commercial wall assemblies using continuous insulation, fluid-applied WRBs, or mechanically-fastened wrap systems where penetration detailing must meet stringent air and moisture barrier requirements.

Residential New Construction

Designed for high-volume residential production builds where speed of installation and consistent performance at each penetration are priorities for framing and mechanical subcontractors.

Renovation and Re-Cladding Projects

Flexible design allows the ProSeal to be used when re-cladding existing structures and updating penetration details as part of a comprehensive building envelope upgrade.

Compatible Materials

• Standard PVC and CPVC supply piping (1/2" to 3/4" OD range)
• Copper water supply tubing
• HVAC refrigerant line sets
• Electrical conduit (smaller diameter ranges)
• SDR-35 pipe (larger ProSeal variants)
• Breathable housewrap and WRB systems
• Non-breathable building wrap systems
• TamlynWrap Drainable Wrap and ProSelect Commercial Wrap
• XtremeFlashing Tape and XtremeSeam Tape (for membrane integration)
• Fluid-applied and self-adhered WRB systems
• Exterior sheathing substrates (OSB, plywood, gypsum sheathing)

Available Configurations

Product Documents

• Catalog Page
• Product Brochure

Technical Specifications

Frequently Asked Questions

Q: What pipe sizes does the PB-12-134 accommodate?
A: The PB-12-134 covers Set A (1/2" to 3/4"), Ring 1 (1" to 1-1/4"), and Ring 2 (1-1/2" to 1-3/4") by using the built-in score lines to size the seal on-site.

Q: Does the ProSeal work with both breathable and non-breathable housewraps?
A: Yes. The ProSeal membrane is available in both breathable and non-breathable configurations to match the WRB system specified for the project, ensuring the penetration detail is consistent with the rest of the envelope assembly.

Q: Is any additional sealant required at the pipe interface?
A: The patented central seal is designed to form a water-tight fit around the pipe without additional sealant at the penetration point. For full system warranty coverage, follow Tamlyn's published installation guidelines, which may call for compatible Tamlyn accessory products at the membrane flange edges.

Q: What warranty coverage does the ProSeal carry?
A: The Tamlyn ProSeal is covered by a 15-year product-only limited warranty against manufacturing defects, provided it is installed in accordance with Tamlyn's applicable installation instructions. Warranty claims must be filed within 30 days of discovering a potential issue by contacting Tamlyn at 1-800-334-1676 or www.tamlyn.com.

Q: Can the ProSeal be used on commercial projects with continuous insulation wall assemblies?
A: Yes. The flexible membrane flange is designed to integrate into commercial building envelope systems, including those using continuous insulation, drainable wraps, and mechanically-fastened or self-adhered WRBs.

Q: What other ProSeal sizes are available for larger pipe diameters?
A: Tamlyn offers the PB-18-38 for 1/8"–3/8" pipe, PB-2-4 for 2" and 3" SDR-35 through 4" SDR-35, and PB-4-6 for 4" SDR-35 through 6" pipe. Contact your DTS representative to order the appropriate size for your application.