The Tremco Dymonic® Caulk with Backer Rod is a high-performance, low-modulus, one-component, moisture-curing, polyurethane joint sealant, specifically designed for sealing expansion and control joints in concrete systems. Tremco Dymonic® Caulk is to be used in conjunction with a closed cell or reticulated polyethylene backer rod.

Features & Benefits

  • Movement capability of plus or minus 25% of the original joint width making it ideal for dynamically moving joints
  • Available in 16 standard colors
  • Additional made-to-order colors available


  • Commercial utility and HVAC space
  • Performing arts centers
  • Computer operation rooms
  • Entertainment, social event spaces and health clubs
  • Transportation depots
  • Hospitals and research facilities
  • Office and residential complexes


Spec Sheets

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The engineers we employ hold the highest industry-recognized credentials in structural analysis, elastomer development and system dynamics.


We are the first ISO accredited PCA ISO-17065, third-party certification body for special seismic certification of non-structural building components and their mounting configurations by the ICC’s International Accreditation Service.

Test & Measurement

We are the only ISO 17025:2005 Accredited Seismic Simulation Test Laboratory with a triaxial shake table owned and operated by California licensed Structural engineers.

Testing Services Update
DCL now offers Nuclear Qualification and Testing services.

In partnership with Greenberry Industrial, we now offer testing services that meet the requirements of ASME NQA-1.

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