Product Data Sheet Safety Data Sheet Show all documents

SikaHyflex®-407 EverFlash Universal

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

  • 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.
Product Data Sheet Safety Data Sheet Show all documents

Usage

  • Peel & stick window flashing and wraps.
  • Nonwoven spunbound window flashing and wraps.
  • Polyethylene wraps and surfaces, polypropylene surfaces and common polyolefins.
  • PVC, steel, metal, aluminum and glass.
  • All connection details specified for the building envelope to achieve a weather tight building.
  • Between flanged windows and weather barriers.
  • Termination and transition seals where flashing meets the building envelope.
  • Window and door perimeters where movement is applicable.
  • Connections between the building envelope wrap and roofing systems.
  • Asphaltic/bituminuous surfaces that would normally bleed with polyurethane sealants.
  • Sealing around penetrations in weather/air barrier and flashing materials.
  • Self adhered air and vapor barrier field-cut edges, T-joints, reverse laps and terminations.
 

Advantages

  • 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.

Packaging

20 fl.oz. (600ml) sausages, case of 20

Color

Bronze

Product Details

Product Information

Shelf Life

12 months in unopened containers.

Storage Conditions

Store dry at 40–95 °F (4–35 °C).

Condition material to 65–75 °F before using.
Technical Information

Shore Hardness

30

(73 °F (23 °C) and 50 % R.H.) (ASTM D-412)

Tensile Strength

200 psi

(73 °F (23 °C) and 50 % R.H.) (ASTM D-412)

Adhesion in peel

See SikaHyflex-407 EverFlash Universal Adhesion Chart

Service Temperature

-40 to 170 °F (-40–75 °C).

Application

Application Information

Ambient Air Temperature

40 to 100 °F. Sealant should be installed when joint is at midrange of its anticipated movement.

Substrate Temperature

40 to 100 °F. Sealant should be installed when joint is at midrange of its anticipated movement.

Curing Rate

Tack-Free Time (TT-S-00230C) 30-90 min depending on climate Cure depth 0.16” / 24 hours
Consumption

Coverage

20 oz Sausage: Yield in Linear feet

Width/Depth1/4''3/8''1/2''
1/4''48.1
3/8''32.121.4
1/2''24.116.012.0
3/4''16.010.78.0
1''6.0
11/4''4.8
11/2''4.0
Application steps

SUBSTRATE PREPARATION

All surfaces must be sound, clean, dry, and free of frost, oil and grease. Curing compound residues and any other foreign matter must be thoroughly removed. Priming is not usually necessary for anodized aluminum, steel, non-absorbent materials such as glass, ceramics, stoneware and tiles. Consult Technical Service at 1-800-933-SIKA for additional information on priming.

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