Willseal 250

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Product Features
No unbonded laminations
Movement: 100% (± 50%) from mean joint size
Advanced acrylic impregnation without heavy fillers that reduce performance
True tensionless system

Willseal 250 is a pre-compressed, self-expanding foam joint sealant with a traffic grade silicone coating engineered to perform in primary horizontal applications that may be subject to solvents and fuels such as those found in parking garages, road and bridge joints, and airport runways. Willseal 250, with its silicone cap, provides a primary seal and is waterproof to rain and snow, making it an optimal primary joint. Willseal 250 is specifically designed to provide a maximum seal in structures with shear and rapid movement. Willseal 250 is manufactured at the highest levels of quality and finely engineered to the maximum performance for every joint size.

Willseal 250 consists of 3 construction elements: a foundation of super resilient micro-cell cross-linked polyurethane foam that is self extinguishing, hydrophobic acrylic emulsion, and a factory applied coating of traffic grade silicone (other coatings available by special order). Willseal 250 is supplied at our highest levels of compression for ease of installation and for best performance. Willseal 250 is delivered in two meter sticks with a specially formulated epoxy for adhesion to the substrate  and a special adhesive for the splice.

Concrete Gray, Traffic Grade Silicone


  • Joint sizes in sticks: 1/2 in. to 6 in.
  • For Joints larger than 4 in., consult Willseal for design considerations
  • Custom sizes available upon request

Willseal 250 is commonly used in horizontal applications, including:

  • Primary horizontal expansion joints with vehicular traffic
  • Road & Bridge Joints
  • Parking Garages
  • Plaza Decks on Grade
  • Joints requiring a watertight seal

Additional information