MarMax Tape

Waterproof repair tape with UV-stable backer
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Multipurpose UV-Stable Leak Repair Tape with MicroSealant® Technology

MarMac’s MarMax™ Tape is a proven, industrial-strength, contractor-grade, leak repair tape and one-step permanent repair system for virtually all roof types, roof accessories, and much more. MarMax™ features a UV-stable backing which creates a waterproof, moisture and air-tight barrier with no additional sealing required.

In addition to the mentioned above ground applications, MarMax™ Tape is perfect for wrapping and sealing smooth-wall PVC pipe in drainage applications. Not only does it excel at restraining and sealing non-pressurized PVC joints, but MarMax™ also makes for a highly functional root barrier, preventing plant and tree roots from penetrating into susceptible PVC joints.

  • Creates a waterproof, moisture and air tight barrier with no additional sealing required.
  • Permanent & remains flexible in extremely cold temperatures
  • Easy to install; no special tools, or primers required
  • Low cost & readily-available
  • Meets and exceeds the material requirements of:
    ASTM D413, ASTM D882, & ASTM C765
Root Barrier for Drainage Pipes - MarMax Tape - MarMac Manufacturing Company

The MicroSealant® technology utilized by MarMax™ is extremely stable and resistant to oxygen, ozone, and heat. MarMax™ is formulated from synthetic polymers and contain a built-in primer that facilitates instant bonding to most known materials used in transportation, roofing, and the traditional building envelope, such as: EPDM rubber, TPO, hypalon, aluminum, galvanized steel, steel, wood, fiberglass, and much more. It will not adhere to silicone. Easy to use, MarMax™ is a permanent fix for leaks and other weather-proofing repairs.

MarMax™ has an extremely wide temperature tolerance, remaining flexible in temperatures as low as -70°F (-57°C), making it virtually impossible to thermally shock the seam causing a leak. MicroSealant® technology makes MarMax™ a self-healing tape and extremely robust to a wide range of surface conditions, resulting in reduced steps during installation.

*MarMax™ is not compatible with silicone sealants or lubricants. Avoid using silicone based products near MarMax™.

4″ 50′ White 6
6″ 50′ White 4

All typical properties are based on, and meet or exceed the material requirements of the following:

Service temp range-40°F212°F
Application temp range40°F150°F
*It is recommended to use a primer for temperatures below 40°F. Keep tape at room temperature prior to application.
180° Peel5 pliASTM D413
Elongation700%ASTM D882
PliabilityNo cracks in membrane 
Temp flexibility @ -30°FPasses 1/2″ radiusASTM C765

Store material in its original container at temperatures between 40-100°F (4-38°C). The shelf life is five (5) years when stored as recommended.

The application surface must be clean and dry. Moisture, dust, dirt, oil, grease, salt, or other foreign matter should be removed with a non-residue cleaner such as acetone or lacquer thinner. Avoid using silicone based products near the application area, as MarMax™ will not stick to silicone.

Apply MarMax™ over the repair area, removing the release liner gradually to prevent contamination of the adhesive prior to application. Rub or roll with pressure using your hand or steel roller to activate bonding process.


Roll widths: 4, 6″
Roll lengths: 50′
Backer color: White


PVC Joints (non-pressurized)
Root Barrier for PVC Joints
RV & Mobile Home Roofs
Skylights & Gutters
Box Trucks & Semi Trailers
Barns & Morton Buildings
Boat Hulls
Pool Repairs
Plumbing Repairs
General Home Repairs

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*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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