LINK-SEAL® Pipe-to-Wall Penetration Sealing Systems
Modular seals & wall sleeves for a permanent, watertight pipe penetration
LINK-SEAL is a modular, mechanical rubber sealing system that forms a permanent, hydrostatic seal around virtually any pipe or cylindrical object as it passes through a wall, floor, or ceiling. Rubber links bolt together and mechanically expand to press against the pipe and the wall opening — no messy lead-and-oakum, no grout, and no cure time. It is the field-proven standard for keeping water, gas, soil, and backfill out of building penetrations.
Why Buyers Choose LINK-SEAL
A mechanical seal that goes in by hand and holds for the life of the structure — no specialized crews, no cure time, no callbacks.
Fast install
Seals a penetration in up to 75% less time than lead-oakum or grouted methods — by hand, with a single wrench.
Permanent, hydrostatic seal
Rated to 20 psig (40 ft of head), exceeding most application requirements — a true watertight, gastight barrier.
Built to last
Elastomers resist aging, ozone, sunlight, water, and chemicals; corrosion-coated carbon or 316 stainless hardware.
Certified & code-ready
NSF/ANSI 61 (potable water), Factory Mutual fire approval, and ISO 9001 manufacturing.
Specify Three Things
Every LINK-SEAL assembly comes down to three decisions. Nail these and Eric can size and quote the full assembly.
The Seal
The LINK-SEAL modular links — rubber elements bolted around the pipe that expand to grip pipe and opening.
The Opening
A cored / cast hole, a Century-Line (CS) sleeve, or a Style WS steel sleeve.
The Size
Pipe O.D. + opening together determine the seal model and the number of links.
Match the Rubber to Your Service
Answer two questions and we’ll point you to the right compound — then confirm the details with Eric.
Sealing Element Selector
Pick your service and temperature range for an instant recommendation.
Select an option above to see your recommended sealing element.
EPDM
All sealing compounds at a glance
| Sealing Element | Color | Temp. Range | Best For |
|---|---|---|---|
| EPDM(standard) | Black / Blue | −40°F to +250°F | General water, direct burial, and atmospheric service |
| Nitrile | Green | −40°F to +210°F | Oils, fuels & solvents — gasoline, motor oil, jet fuel, hydraulic fluid |
| Silicone | Grey | −67°F to +400°F | Temperature extremes and fire-rated models (T, FD, FS) |
Choose the Wall Opening
LINK-SEAL seats in a cored hole or in a sleeve cast into the structure. Pick the opening that fits your wall and pour.
| Wall Opening | When to Use It |
|---|---|
| Cored / cast hole | Existing or field-drilled round openings in concrete or masonry. |
| Century-Line (CS) sleeve | Lightweight HDPE sleeve (≈⅛ the weight of steel) cast into new concrete pours; non-conductive, field-cuttable, sizes to ~19" I.D. |
| Style WS steel sleeve | Welded / seamless steel sleeve with a full-circle water-stop plate for thrust resistance; painted (WS) or galvanized (WSG). Ideal for high-temperature settings. |
Sizing & Selection
Fits virtually any pipe — with effectively no upper size limit.
Fits ½" to 48"+ pipe
Steel & plastic pipe from 0.840" O.D. (½") up to 48"+, and ductile iron up to ~50.8" O.D. — effectively no upper limit to the pipe size that can be sealed.
How to order
Confirm the pipe’s actual O.D., choose the opening type, then read the model and links-per-seal from the LINK-SEAL sizing chart (PDF). Specify sleeve length separately.
Order format
Example: LS-575-C-10 — seal size, model, and link quantity. Sleeve length is called out separately on the order.
Where LINK-SEAL Goes to Work
Mechanical & boiler rooms
Water & wastewater plants
Foundations & basements
Tanks & vaults
Fire-rated walls & floors
Utility & service entries
Data centers
Pump & equipment skids
Ready to spec, size, or order?
Contact Eric — he’ll size the right seal assembly for your penetration and get you a quote.
