Adcotherm HMC-7RC is a hot-applied butyl rubber-based adhesive and sealant that bonds to various substrates, creating a permanent seal against moisture, dust, and air intrusion. It exhibits excellent adhesion to glass, EPDM, PVC, and painted metal substrates and is highly resistant to both interior and exterior environmental conditions.

Product Type: Elastomeric Adhesive, Elastomeric Sealant

Application Area: Door Water Deflectors, Gaskets, Weatherstripping, Window Module, Windshield Reveal Moldings

Compatible Substrates & Surfaces: Coated Surfaces, Ethylene Propylene Diene Monomer (EPDM), Glass, Metal, Polyethylene (PE), Polyvinyl Chloride (PVC)

Chemical Family: Butyl Rubber

Features: Air Intrusion Resistance, Dust Resistance, Excellent Moisture Resistance, Good Adhesion, Good Sagging Resistance, Good Weather Stability

Technical Data Sheet

Enhanced TDS

Identification & Functionality

Chemical Family

Features & Benefits

Product Highlights
  • Has excellent adhesion to glass, EPDM, PVC
  • Has excellent adhesion to painted metal substrates
  • Extremely resistant to both interior and exterior environmental conditions
  • Sag resistance at high temperature
  • Excellent adhesion to automotive paint systems
  • Excellent adhesion to polyethylene film
  • Low temperature flexibility at -29°C (-20°F)
  • Resistant to environmental exposure

Applications & Uses

Recommended Applications
  • HMC-7RC is typically used for sealing fixed window modules, door water-deflectors, windshield reveal moldings, and as a hot applied gasket.
  • It can also be used as a temporary adhesive and assembly aid to bond lightweight materials prior to final assembly.


Technical Data
ValueUnitsTest Method / Conditions
Specific Gravity18 - 32ASTM D71
Solids Content100.0%
Sag Resistance (at 121°C)No movement9985934.0
Ash Content24.0%FLTM-150-10
Force to Compress (5 mm diameter bead, 50%)1.1N/mmASTM C972
Yield Strength150.0kPaMS-CD641
Cone Penetration95.0dmmASTM D217
Cold Slam (at -29°C, 10 slams)PassGM9773P
Peel Strength2000.0N/m9985934.0
Service Temperature Range-40 to 121°C

Regulatory & Compliance

Regulatory Information

Meets requirements of :


MS-CC-257 Type B

MS-CD-641 Type B


WSK-M4G261-B1 & B2




GMW 15523
Nissan NES M 8508

Packaging & Availability

Packaging Type
Packaging Information

HMC-7RC Sealant is available in the following standard packages : 

  • 5 gallon pail
  • 55 gallon drum

Storage & Handling

Shelf Life
24 months
Storage and Handling Conditions
  • Store material in original unopened packaging at temperatures beteen 4°C to 43°C (40°F to 110°F). Shelf life is 24 months minimum when stored as recommended.
  • HMC-7RC can be processed with standard hot-melt pumping equipment at a temperature of 121°C to 150°C (250°F to 300°F).
  • Clean Up : 
    • Let material cool to room temperature and remove by pulling rapidly from the substrate.
    • Residual traces can be removed with an aliphatic solvent (mineral spirits) or a 50/50 alcohol/water solution.