PolySeal Coupler

External couplers for jointing of HDPE & HDPP pipe

The Best Method for Jointing Corrugated HDPE Pipe

PolySeal TYPES

MarMac PolySeal Coupler for HDPE and ADS Pipe
Standard PolySeal
MarMac Double-Wide PolySeal Coupler for HDPE and ADS Pipe
Double-Wide
MarMac Chemical & Corrosion Resistant Coupler
Chemical Resistant

MarMac PolySeal is a flexible, high-strength pipe coupling that permanently seals and restrains corrugated plastic pipe. PolySeal Couplers are over-engineered, reinforced external joint seals designed to connect HDPE / HDPP corrugated pipe, while remaining both infiltration proof and exfiltration resistant. PolySeal Couplings are perfect for cut & butt joints, field repairs, new detention systems, and more.

Today, millions of PolySeal pipe couplings have been installed underground around the world with nearly a 100% success rate. PolySeal is the proven, premiere coupler for HDPE pipe connections, and the “go to” solution for when it really matters. PolySeal Couplers are designed to be installed in the worst field conditions, succeeding where other corrugated pipe adapters fail, and are an excellent choice for both field repairs and new installations. These couplers are over-engineered to outlast the pipes they connect.

Stack of PolySeal Couplers HDPE - MarMac Construction Products
Rolled Pipe Coupler - MarMac Construction Products
*Custom 4-band PolySeal shown
Features & Benefits
  • Infiltration-proof exfiltration-resistant
  • Easily installed & immediately inspectable
  • Millions installed today with nearly a 100% success rate
  • Permanent protection with proven performance
  • Strong, shear & puncture-resistant
  • Double-Wide Repair & Custom options available
  • Protection from corrosion, acids & alkali (see PolySeal CR)

Engineered to last.

MarMac manufactures PolySeal couplings with interval layers of our rubberized mastic, specially formulated to adhere aggressively to all known pipe surfaces. An internal sheet of strong, puncture & shear resistant, woven polypropylene and an outside backing of cross-laminated polyethylene makes PolySeal resistant to acids and bases. The integrated compression bands mechanically “lock” the coupler into the corrugations of the pipe, bonding the mastic to the pipe wall and forming a permanent seal.

* The below graphic shows our heavy-duty, 3-ply construction of PolySeal 30″≥ and all Double-Wide sizes. PolySeal sizes under 30″ use our 2-ply design where the second, inner layer of polyethylene/mastic are removed.

POLYETHYLENE BACKING

Heavy-duty, cross-laminated top layer, available with UV & chemical resistance

RUBBERIZED MASTIC

Specially formulated, rubberized mastic aggressively adheres to the pipe surface

WOVEN POLYPROPYLENE

Puncture & shear resistant reinforcement layer sandwiched between mastic sealant

RELEASE FILM

A protective, peelable release film protects the mastic until ready for use

MarMac Construction Products CSP Coupler Layers

PolySeal is manufactured with interval layers of our rubberized mastic, specially formulated to adhere aggressively to all known pipe surfaces. A sheet of puncture and shear-resistant woven polypropylene, and an outside backing of cross-laminated polyethylene makes PolySeal resistant to most acids and bases (additional protection available with Chemical Resistant PolySeal). The integrated compression bands mechanically “lock” into the corrugations of the pipe, bonding the mastic to the pipe wall, and forming a permanent seal.

The minimum length of a PolySeal Coupler is the circumference of the outside diameter of the pipe, plus eight inches for overlap.

MIN MAX
RUBBERIZED MASTIC
Ash-inert matter 8% 15%
Volatiles 0.1% 2.0%
Softening temp 175°F
Specific gravity 0.95 1.05
Penetration 60 dmm 90 dmm
Flow 10 mm 10 mm
POLYETHYLENE BACKING
Tensile strength 4000 psi
Elongation at break 100%
Tear resistance 1500 psi
Water absorption 0.01%
REINFORCING MESH ELEMENT
Tensile strength (Warp) 75 lb/in
Tensile strength (Fill) 75 lb/in
Elongation at break (Warp) 20%
Elongation at break (Fill) 20%

PolySeal should be stored carefully in their original packaging, out of direct sunlight and protected from the elements. Materials should be kept away from direct heat, sparks and open flame. For optimum results, couplers should be stored in a tepid (60°-80°F) environment prior to installation.

Surface preparations: Inspect the outside of the joint. Brush surface as needed to ensure it is free of debris. If installing on horizontal pipe, dig a bell hole for complete access to the joint.

The coupler shall be placed around the pipe with the mastic side to the pipe wall and spanning the joint, while centered on the joint gap to be sealed. The protective film shall be removed and the coupler applied with the overlap at the top of the pipe. The tensioning straps shall be aligned between the pipe corrugations and tightened. The closing flap protective film shall be removed and the closing flap shall cover the exposed straps and the work area.

The minimum length of PolySeal couplers is the circumference of the outside diameter of pipe, plus an additional eight inches (8″) for overlap.
PIPE ID WIDTH LENGTH WEIGHT
HOSE CLAMPS APPROX
4″ 9″ 21″ 1 lbs
6″ 9″ 29″ 1.5 lbs
8″ 9″ 36″ 2 lbs
10″ 9″ 46″ 3 lbs
12″ 9″ 54″ 4 lbs
15″ 9″ 64″ 5.5 lbs
18″ 12″ 76″ 6 lbs
24″ 12″ 101″ 8 lbs
RATCHETS (heavy-duty sizes)
30″ 16″ 122″ 16.5 lbs
36″ 20″ 142″ 22 lbs
42″ 20″ 162″ 27 lbs
48″ 20″ 183″ 30 lbs
54″ 28″ 204″ 48 lbs
60″ 28″ 222″ 54 lbs
Contact us using the form below for additional configurations & PolySeal Double-Wide sizing.

VERSIONS

AVAILABILITY

Pipe sizes: 4-60″

APPLICATIONS

HDPE & HDPP Pipe
Field Repairs
Cut & Butt Joints
New Installations
Detention Systems

STANDARD PolySeal

Common-Size Seals for HDPE/P Pipe Joints

MarMac’s PolySeal is a high performance, external joint coupler designed for the prevention of infiltration and resistance of exfiltration at joints of common HDPE & HDPP corrugated pipe.

Our standard PolySeal coupler has three integrated compression bands. Sizes under 30″ are standard-duty and use hose clamp bands made of high-strength 409 or 304 stainless steel. Heavy-duty sizes over 30″ contain an additional membrane layer of polyethylene and mastic, and utilize built-in ratchet straps.

MarMac PolySeal Coupler for HDPE and ADS Pipe
MarMac Double-Wide PolySeal Coupler for HDPE and ADS Pipe

Double-Wide PolySeal

A Wider HDPE Coupler for Added Security or Repairs

MarMac’s Double-Wide PolySeal Couplings are heavy-duty 3-ply as they are manufactured with an additional layer of polyethylene and mastic. Nearly twice the width of a standard PolySeal, our Double-Wide PolySeal Coupler comes with five integrated compression bands, as opposed to three with our Standard coupler.

Common uses include repairs, such as instances where pipe ends have minor damage or to cover small punctures in a pipe caused by fork trucks or similar. Additionally, Double-Wide PolySeal can be used in place of standard PolySeal to make a stronger, stiffer joint.

Chemical Resistant PolySeal

Protection Against Soil Containing Hydrocarbons

Chemical Resistant PolySeal (PolySeal CR) uses a proprietary, co-extruded, multi-layer barrier film lamination on the outside of the coupler. This film has been tested per ASTM F739 against a battery of chemicals at 95% concentration for permeation resistance with excellent results, including Benzene, Toluene and other hydrocarbon based solvents.

Common uses for PolySeal CR include install locations where the soil contains, or has the potential to contain hydrocarbons. These couplers are commonly used in airport detention systems, as well as in many other applications.
MarMac Chemical & Corrosion Resistant Coupler

PolySeal Coupler Requests

We’re here to help! For purchase inquiries, additional information, or other questions regarding our PolySeal Coupler, fill out the form below.

Other Products

*All statements and technical information are based on tests and/or data which MarMac Manufacturing deems reliable, however, MarMac does not warrant or guarantee the accuracy or completeness of such information. Please read further manufacturer liability and warranty information.

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