Hydrashell HT200

HydraShell HT200

High Temperature Ice And Water Protection

Marco’s premier underlayment, this peel and stick, self-adhering solution provides superior leak protection.

  • Clean, easy-to-handle, self-adhering application
  • Split-back release film peels off for easy installation
  • Instant watertight laps
  • Adheres to a variety of substrates
  • Polymer-modified asphalt gives excellent pliability
  • Exceptionally durable high-tensile/tear strengths
  • Glass fiber reinforcement, high dimensional stability
  • 30-year limited warranty
  • ICC-ES-ESR-3856
  • FL 18241

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Hydrashell HT200


It doesn’t get any better than this: HydraShell™ HT200, Marco’s premier underlayment for high temperature ice and water protection. This peel and stick, self-adhering solution provides superior leak protection ideal for standard roofing areas plus valleys, ridges, coping joints, chimneys, vents, formers, skylights, and low-slope sections. Exceptionally durable and pliable, HydraShell HT200 adheres to a wide variety of substrates and delivers instant watertight laps. With a 30-year warranty, you can rely on Marco quality performance long-term, protecting your building investment and offering peace of mind.


Width: 36”
Length: 66’ 8”
Thickness: 48 mil nom.
Gross Coverage: 2 squares
Weight: 50 lb nom.
Tensile Strength, MD: 34 lbf/in
Tensile Strength, XMD: 28 lbf/in
Elongation, Mod. Bit. Portion: 10% min
Adhesion to Plywood @ 40° F: 2 lbs/ft of width
Adhesion to Plywood @ 75° F: 20 lbs/ft of width
Thermal Stability, Max: 0.1 inch
Flexibility Temperature: -20° F
Tear Resistance, MD & XMD: 20 lbs
Slip Resistance: Pass
Moisture Vapor Permanence: 0.1 U.S. Perm. or less
Nail Seal Ability: Pass
Waterproof Integrity: Pass
ASTM Testing: D1970

Installation Question?

Easy, One Person Installation

HyrdraShell HT200 features a split-back release film that peels off for easy installation. The clean, easy-to-handle, self-adhering application makes installation quick and efficient.

Contact Marco for detailed installation instructions.