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.

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