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Sika SikaHyflex-407 EverFlash Universal 20oz Sausage 528095

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.

  • Excellent long term UV resistance and weatherability
  • Can be painted over with most acrylic coatings
  • Unprimed adhesion to challenging, low surface tension surfaces
$16.41
Availability: Out of stock

SKU
19089

SikaHyflex 407 EverFlash Universal – 20oz Hybrid Flashing and Weather Barrier Sealant

SikaHyflex 407 EverFlash Universal is a high-performance, one-component, hybrid technology sealant specifically designed for flashing, weather barriers, and building envelope applications. Packaged in a 20oz sausage (color: bronze), it provides primerless adhesion to a wide range of low surface energy materials including polyethylene, polypropylene, and peel-and-stick membranes. With outstanding flexibility and weather resistance, SikaHyflex 407 forms durable seals between windows, doors, roof transitions, flashing terminations, and building wraps. It is compatible with asphaltic and bituminous surfaces and offers UV resistance, paintability, and ease of application across demanding substrates without causing bleeding or staining.

Key Features:

  • Hybrid sealant with primerless adhesion to polyethylene, polypropylene, and other polyolefins
  • Designed for use with peel-and-stick window flashing and wraps
  • Non-sag formula for vertical and overhead applications
  • Excellent UV resistance and long-term weatherability
  • Compatible with asphaltic/bituminous surfaces—no bleeding
  • Paintable with most acrylic coatings
  • Seals around window perimeters, penetrations, and transitions
  • ASTM C920 compliant: Type S, Grade NS, Class 12.5, Use NT, G, A, O, M

Applications:

  • Sealing peel-and-stick window flashing and wraps
  • Termination and transition seals between flashing and weather barriers
  • Connections between envelope wrap and roofing systems
  • Window and door perimeter sealing
  • Adhering to nonwoven spunbound wraps, PVC, metal, glass, and aluminum
  • Sealing around penetrations in air/vapor barriers

Technical Specifications:

Property Value
Packaging 20 fl.oz. (600ml) sausages (case of 20)
Color Bronze
Shore Hardness 30 (ASTM D412)
Tensile Strength 200 psi (ASTM D412)
Elongation at Break 250%
Tack-Free Time 30–90 minutes (climate-dependent)
Cure Depth 0.16" per 24 hours
Service Temperature -40°F to 170°F
Application Temperature 40°F to 100°F
Shelf Life 12 months (unopened)

Frequently Asked Questions:

Can SikaHyflex 407 be used on bituminous surfaces?
Yes, it is compatible with asphalt and bituminous materials and will not cause bleeding like polyurethane sealants.

Is priming required before application?
In most cases, priming is not necessary. However, proper surface preparation is critical for optimal adhesion.

Can SikaHyflex 407 be painted?
Yes, it can be painted over with most acrylic coatings once fully cured.

More Information
BrandSika
Size20oz
ManufacturerSika