Request Information
FM® 94 adhesive is a 220ºF (104°C) service temperature, modified epoxy film adhesive designed for bonding metallic and composite structures. FM® 94 adhesive offers a unique combination of high temperature performance, toughness and moisture resistance as demonstrated by its ability to bond to wet Nomex® honeycomb and retention of shear properties after pre- and post-bond humidity exposure. FM® 94 adhesive is designed for applications demanding the best of both 220ºF (104°C) service temperature and -67ºF (-55°C) peel strength.

For composite and metal bonding applications, FM® 94 adhesive is formulated to exhibit superior elongation, toughness and shear strength properties. The controlled flow characteristics allow for its use in co-cured applications as well as bonding pre-cured structures. Also, FM® 94 adhesive provides excellent electrical insulation between metal and graphite composites, reducing the potential for galvanic corrosion.
Unit of Measure

Characteristics for Physical Properties

Shelf Life

 N/A 6 months at or below 40ºF (4ºC) from date of shipment for unsupported forms 12 months at or below 0ºF (-18ºC) from date of shipment for supported forms

Shop Life at 75 Degree Fahrenheit (ºF) (24 Degree Celsius (ºC))

 N/A 30 days at or below 75ºF (24°C)

Maximum Volatiles at 250 Degree Fahrenheit (ºF) (121 Degree Celsius (ºC))

 N/A 1.0 %

Test Method for Volatile

 N/A American Society for Testing and Materials (ASTM 3530)

Characteristics for Product Availability

Nominal Weight1 N/A 0.03 psf0.060 psf146 g/m²293 g/m²

Nominal Thickness for 0.030 Pound Per Square Foot (psf) Nominal Weight

 N/A 0.005 in0.13 mm

Nominal Thickness for 0.060 Pound Per Square Foot (psf) Nominal Weight

 N/A 0.010 in0.25 mm

Color

 N/A Green
Roll Width2 N/A 36 in91 cm

Roll Length

 N/A 60 yd55 m

Carrier

 N/A Polyester Mat

Characteristics for Physical Properties (BR® 6747-1 Corrosion Inhibiting Primer)

Shelf Life (BR® 6747-1 Primer)

 N/A 12 months at or below 40ºF to 55ºF (4°C to 13°C) from date of shipment 6 months at or below 56ºF to 75ºF (14°C to 24°C) from date of shipment DO NOT FREEZE

Shop Life at 90 Degree Fahrenheit (ºF) (32 Degree Celsius (ºC)) (BR® 6747-1 Primer)

 N/A 30 days

Color (BR® 6747-1 Primer)

 N/A Yellow

Solids Content (BR® 6747-1 Primer)

 N/A 20 %30 %

Density for 20 Percent (% ) Solids

 N/A 8.78 lb/gal1050 g/L

Density for 30 Percent (%) Solids

 N/A 9.10 lb/gal1090 g/L

Recommended Primer Thickness

 N/A 0.10 to 0.30 mil0.0025 to 0.0076 mm

Recommended Cure

 N/A Airy dry 30 minutes in ambient conditions Cure 60 minutes at 250ºF (121ºC)

Recommended Processing Cure Cycle

Recommended Processing Cure Cycle

 N/A Autoclave Cure Cycle

Apply full vacuum, 24 in Hg (0.081 MPa) minimum.
Apply 40 psi (0.28 MPa) pressure, vent vacuum at 20 psi (0.14 MPa).
Heat from 75ºF (24ºC) to 250ºF (121°C) at 2ºF - 5ºF (1°C - 3°C)/minute.
Hold at 250ºF (121°C) for 60 minutes.
Cool under pressure below 140ºF (60°C) at 2ºF - 5ºF (1°C - 3°C)/minute.

Health and Safety

Health and Safety

 N/A Please refer to the product SDS for safe handling, personal protective equipment recommendations and disposal considerations.

Surface Preparation

Non-Metallic Cured Substrates

 N/A Most high performance composites employ a removable peel ply of nylon or Dacron® fabric. Remove the peel ply and bond immediately. For surfaces without peel ply:
  1. Lightly sand the surface to be bonded using 240 grit - 280 grit sandpaper.
  2. Clean the surface using clean cotton (lint free) cloth and MEK or acetone.
  3. Dry thoroughly at 160ºF ± 10ºF (71ºC ± 6ºC) for 1 hour - 2 hours.

Aluminum Skins

 N/A A clean, dry, grease-free surface is required for bonding. FM® 94 is used with standard cleaning techniques involving a four step procedure of solvent degreasing, alkaline cleaning, chemical deoxidizing (etching), and phosphoric acid anodizing (Boeing patent 4,085,012. April 1978. Phosphoric acid anodizing is now being used by a large number of aircraft manufacturers due to the improved surface bond durability it provides.). General guidance for etching and phosphoric acid anodizing can be found in ASTM 2651 and ASTM 3433, respectively. Best results for aluminum feature priming after appropriate surface preparation, with BR® 6747-1, BR® 6747-1 NC or BR® 127 primer.

Primer Application

 N/A Although not mandatory, BR® 6747-1 or BR® 127 corrosion inhibiting primer are recommended for use with FM® 94 adhesive in the bonding of aluminum details. These primers offers superior durability and resistance to hostile environments within the bond line and also may be used as a protective coating outside the bonded areas. Apply the individual primer as follows:
  1. Allow material to warm to room temperature, 75ºF (24°C), prior to opening container
  2. Thoroughly mix before application and agitate during application
  3. Spray or brush coat to a dry primer thickness of 0.0001 inch (0.0025 mm) nominal with a 0.0003 inch (0.0076 mm) maximum thickness
  4. Air dry 30 minutes minimum prior to using
  5. Oven cure 60 minutes at 250ºF ± 10ºF (121°C ± 6°C)

Lay-Up Procedure

Lay-Up Procedure

 N/A
  1. When FM® 94 is removed from refrigerator storage, the adhesive must be allowed to reach room temperature [75ºF (24ºC)] before the roll is unpackaged. Note that the adhesive film is sandwiched between release paper and polyliner.
  2. Remove either of the interliners and place the adhesive against the surface to be bonded. Care should be taken to prevent air entrapment between the film adhesive and substrate, especially in large area bonds.
  3. If additional tack is desired, the adhesive may be heated to as high as 140ºF (60°C) for up to 30 minutes without altering the adhesive properties. Before heat tacking, ensure the film is properly positioned, otherwise removal will be difficult.
  4. Complete the assembly after removing the other interliner.

Disclaimer

Disclaimer

 N/A The data and information provided in this document have been obtained from carefully controlled samples and are considered to be representative of the product described. Solvay does not express or imply any guarantee or warranty of any kind including, but not limited to, the accuracy, the completeness or the relevance of the data and information set out herein. Because the properties of this product can be significantly affected by the fabrication and testing techniques employed, and since Solvay does not control the conditions under which its products are tested and used, Solvay cannot guarantee the properties provided will be obtained with other processes and equipment. No guarantee or warranty is provided if the product is adapted for a specific use or purpose. Solvay declines any liability with respect to the use made by any third party of the data and information contained herein. Solvay has the right to change any data or information when deemed appropriate. All trademarks are the property of their respective owners. ©2017, Solvay. All rights reserved.

Features and Benefits

Features and Benefits

 N/A
  • Demonstrates superior strength in bonding both metallic and composite structures
  • Provides structural performance from -67ºF to 220ºF (-55°C to 104°C)
  • Offers exceptional elongation and toughness
  • Higher service temperature version of FM® 73 film adhesive
  • Recommended for use with BR® 6747-1, FM® 490A and BR® 127

Additional Information

Additional Information

 N/A FM® 94 film adhesive is manufactured as a supported adhesive, with knit or mat carriers, as well as an unsupported film. When supported with a knit carrier, optimal mechanical properties can be obtained. The random mat provides superior handling characteristics. With the mat carrier, FM® 94 adhesive can be supplied in a one-side tacky (OST) version which helps reduce air entrapment when bonding large metal or composite parts.

Typical applications for FM® 94 include bonding of metallic and composite structures.
  • 1 Weight tolerance equals nominal weight ± 0.005 psf (± 24 gsm)
  • 2 Available in slit form. Please contact Solvay for more information.