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Kent Seal™ No 2 Butyl Sealant 

A premium grade rope gasketing material, Kent Seal™ No. 2 Butyl Rubber Joint Sealant is ideally suited for fast, efficient sealing of joints in virtually any concrete structure or pipe. Packaged in pre-formed coils with an easy-release backing paper.

Our Kent Seal™ No. 2 Butyl Rubber Joint Sealant is compliant with the Build America, Buy America Act (BABA).

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Product Benefits

  • Meets ASTM C990 and AASHTO M-198 
  • Suitable for all pipe and manhole sizes 
  • Temperature stable 
  • Aging resistant 
  • Highly compressible 

The dense polymer structure resists water vapor permeation through the joint. A highly compressible compound, Kent Seal™ packs tightly into joints and imperfections on the mating surface. It is highly adhesive, making it ideal for hard-to-bond surfaces. Flexible, temperature stable and aging resistant.

Kent Seal™ is the perfect product for sealing joints on anything requiring a high-quality watertight seal. This includes, but is not limited to, precast products such as pipes, manholes, box culverts, septic tanks, catch basins, utility boxes, underground vaults and burial vaults.


Kent Seal™ No 2 Butyl Sealant meets or exceeds the material requirements of:

  •  SS-S-00210 (210A)
  •  AASHTO M-198
  •  ASTM C990

Temperature Ratings

  • Application: 30° to 120 F° (-1° to 49 C°)
  • Service: -30° to 200 F° (-34° to 93 C°)
  • Storage: 40° to 100 F° (4° to 38 C°)
  • Shelf Life: Five years in unopened cartons when stored within temperature range above

Storage and Handling

Kent Seal™ Butyl Rubber Sealant should be stored in a sheltered, cool, dry place at the precaster’s facility, as well as on the jobsite.

Kent Seal™ Butyl Rubber Sealant must not be stored near any electrical equipment that produces ozone. It must be protected from prolonged exposure to sunlight, extreme heat in the summer, and extreme cold, snow and ice in the winter. Kent Seal™ Butyl Rubber Sealant must also be protected from contact with solvents and petroleum-based greases and oils.

Available Sizes & Packaging

Size* (in/mm)Dimensions
Coil Length
Coils per BoxBoxes per skid
1.50"/38.11.25x1.50/31.8x38.110’ 11”/332.6440
For informational purposes only. Consult your HK representative for sizing to suit your specific joint details.

Please contact your HK representative for assistance with product selection.