Product Data Sheet Show all documents

SikaWall®-85 Flash Seal NP

(formerly MSeal AWB 970NP)

A composite, self-adhering flashing membrane.

SikaWall®-85 Flash Seal NP is a 20-mil thick, self-adhering, self-sealing, composite membrane of polyester fabric and butyl adhesive. SikaWall®-85 Flash Seal NP is supplied in rolls, on release paper, for easy application.

  • Primerless application
  • 180-day UV exposure
  • Remains flexible over time
  • Meets AAMA 711-13
 
Product Data Sheet Show all documents

Usage

  1. Used as an air barrier accessory to connect different air barrier materials or assemblies together to make the air barrier continuous.
  2. Flashing at sills, approved sheathing joints, rough openings, and terminations.
  3. As an expansion joint seal.
 

Advantages

  • Primerless application
  • 180-day UV exposure
  • Remains flexible over time
  • Meets AAMA 711-13
 

Packaging

SikaWall®-85 Flash Seal NP 4:

4" x 75' (10.2 cm x 22.9 m ) roll, 9 rolls per carton

SikaWall®-85 Flash Seal NP 6:

6" x 75' (15.24 cm x 22.9 m ) roll, 6 rolls per carton

SikaWall®-85 Flash Seal NP 9:

9" x 75' (22.9 cm x 22.9 m ) roll, 4 rolls per carton

Product Details

Product Information

Shelf Life

Two years when stored in original container or factory sealed packaging as directed.

Storage Conditions

Protect Sika Facades materials during transportation and installation to avoid physical damage. Store in a cool, dry place protected from freezing. Protect from extreme heat, over 90°F (32°C), and direct sunlight.
Technical Information

Test Results

Application

Consumption

Coverage

SikaWall®-85 Flash Seal NP 4:
675 Lin ft (205.7 Lin m) per carton

SikaWall®-85 Flash Seal NP 6:
450 Lin ft (137.2 Lin m) per carton

SikaWall®-85 Flash Seal NP 9:
300 Lin ft (91.4 Lin m) per carton
Application steps

APPLICATION INSTRUCTIONS

SikaWall®-85 Flash Seal NP is approved for use on these acceptable substrates and other surfaces:

  1. Wood framing (Note: Verify adhesion before applying to wood that has been treated in any way.)
  2. ASTM C1177 sheathings, e.g. eXP™, GlasRoc®, Securock™ and DensGlass™
  3. Water-resistant core gypsum sheathing (ASTM C79/ASTM C1396)
  4. Cement-board (ASTM C1325 Type A Exterior)
  5. Masonry
  6. Exposure 1 or exterior plywood sheathing
  7. Exposure 1 OSB
  8. Steel framing
  9. SikaWall®-85 Flash Seal NP
  10. Sika Facades Air / Water-Resistive / Vapor Barriers and Base Coats.

SUBSTRATE PREPARATION

  1. Acceptable substrate shall be dry, clean,sound and free of releasing agents, paint, contaminants, residue or other coatings. Verify substrate is flat, free of fins or anything that would hinder the adhesion of the membrane.
  2. Unsatisfactory conditions shall be reported to the general contractor and corrected before application of the Sika Facades materials.
  3. A primer such as 3M Super 77 can be applied to enhance adhesion if difficulty is encountered with tape sticking to the substrate.
  4. Wrap openings in accordance with Sika Facades Air/Water-Resistive/Vapor Barrier application guidelines and technical bulletins.

APPLICATION

  1. Cut SikaWall®-85 Flash Seal NP roll to desired length with a utility knife or scissors.
  2. Peel back sufficient length of release paper immediately before application and center the SikaWall®-85 Flash Seal NP over the area to be sealed.
  3. Using a wallpaper roller, extensionhandled countertop roller or weighted hand roller, firmly roll the SikaWall®-85 Flash Seal NP to the area being sealed. As the MasterSeal® AWB 970 NP is applied, pull more of the release film, exposing the adhesive surface, pressing down with a roller and keeping the SikaWall®-85 Flash Seal NP smooth.
  4. If blisters occur, they can be slit with a utility knife and the SikaWall®-85 Flash Seal NP pressed flat with a roller. Ensure no voids or holes are present. Repair as necessary.
  5. Installed materials should be checked for delamination of edges before final system application. Repair as necessary.
  6. Overlap SikaWall®-85 Flash Seal NP a minimum of 2" (50 mm) horizontally and 6" (150 mm) vertically.
  7. Ensure SikaWall®-85 Flash Seal NP is coated with Sika Facades Air/Water-resistive/Vapor Barrier after application
  8. Install exterior cladding system in accordance with manufacturer’s current specifications and details.

     NOTE: Provide sufficient slack at expansion joints to allow for movement.

 

LIMITATIONS

  1. Do not apply Sika Facades materials in ambient temperatures below 40ºF (4.5ºC). Provide supplementary heat during installation and drying period (at least 24 hours after installation and until dry) when temperatures less than 40ºF (4.5ºC) are anticipated.
  2. When applying the membrane in cooler temperatures, store material for 24 hours inside at room temperature for better adhesion. Adhesion properties of SikaWall®-85 Flash Seal NP during application in cooler temperatures may also be improved by the use of a heat gun.
  3. Do not store rolls on end.
  4. Protect from rain and physical damage until installation of exterior cladding system.
  5. Do not apply the material to any surfaces not listed as an acceptable substrate/surface, including silicone caulk or other solvent based products.
  6. Do not expose material to sunlight for over 180 days.
  7. Apply SikaWall®-85 Flash Seal NP only to dry surfaces. Allow surfaces to dry a minimum of 24 hours after precipitation.

 

Consult Sika Facades Technical Services Department at +1 (800) 589-1336 for specific recommendations concerning all other applications.

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