GSSI® MH-19 Rubber Sealant Tape

1 of 4 products in this brand
GSSI® MH-19 Rubber Sealant Tape is a pressure-sensitive sealant tape extruded onto silicone release paper. MH-19 is widely used in the mobile home, RV, and modular construction industries wherever a watertight seal is critical, such as roof seams, roof-to-sidewall joints, vents, stacks, and gutter mountings.

Chemical Family: Butyl Rubber

Product Type: Elastomeric Sealant, Paper Tape, Tape

Application Area: Gutters, HVAC Ducts, Mobile Homes, Recreational Vehicles, Roofs, Vents

Compatible Substrates & Surfaces: Metal, Silicone

Features: Color Retention, Cost Effective, Easy To Apply, Easy To Finish, Excellent Adherence, Good Adhesion

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Identification & Functionality

Backing Material Type
Chemical Family

Features & Benefits

Product Advantages

MH-19 makes construction jobs move smoothly and quickly.

  • Superior adhesion
  • Stronger than putty tapes
  • Easily trimmed with blunt tool
  • Awled quickly and cleanly
  • Provides watertight seal
  • Easy application
  • Excellent adhesion to sidewalls
  • No discoloration

Applications & Uses

Compatible Substrates & Surfaces
Product Insatallation

Surface Preparation: All surfaces to be sealed should be free of dust, dirt, oil, moisture, grease, etc. before applying tape.
Working Conditions: Apply in normal dry working conditions.
Application: Apply directly from roll or cut to size with knife or scissors. Press MH-19 firmly into place with hand. Intimate contact must be made between tape and subsurface to assure a watertight seal. Gently peel off siliconerelease paper. When lapping tape, allow at least 1/4” (6.4 mm) overlap.

Meets AAMA 807.1-85 Requirements

Product Insatallation Diagram
GSSI® MH-19 Rubber Sealant Tape - Product Insatallation


Physical Form
Typical Properties
ValueUnitsTest Method / Conditions
Specific Gravity (US)15.3 - 15.5lb./galASTM D 792
Low Temperature FlexibilityNo loss of adhesion or cracking-ASTM C 765
Weight Loss after Heat Aging0.388 - 0.392-ASTM C 771
Oil Migration/Plasticizer Bleed-OutSlight wetting on top sheet, No bleed.-ASTM C 772
Softness Penetration9.5 - 9.9mmASTM C 782
Tensile Adhesive Strength (MOF, Cohesive)31.6 - 36.4lb. forceASTM C 907
Yield Strength (lb. force)7.8 - 8.2psiASTM C 908

Packaging & Availability

Packaging Type