HyFlex 407

HyFlex 407

HyFlex 407 - Universal Flashing and Weather Barrier Sealant

SikaHyFlex®-407 EverFlash Universal is a one component, hybrid technology, non-sag, flexible, flashing and weather barrier sealant designed for primerless adhesion to the most challenging substrates found in the building envelope such as peel & stick window and flashing membranes.

HyFlex®-407 is compatible with Monolithic Membrane 6125® and delivers an effective solution by maintaining superior performance which is a crucial consideration for ensuring the efficacy of waterproofing and roofing systems.  

Meets ASTM C920, Type S, Grade NS, Class 12.5, use NT, G, A, O, M.

Characteristics / Advantages

  • Dual-compatibility with Monolithic Membrane 6125® (MM6125®)
  • Unprimed adhesion to challenging, low surface tension surfaces such as polyethylene, polypropylene and polyolefins.
  • Compatible with bituminous and asphalt based materials – will not cause bleeding.
  • Excellent long term UV and weatherability.
  • Can be painted over with most acrylic coatings.
Sika Flex