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3MTM Aerospace Product Guide

Detailed specifications, product families, selection guides, and key points for the 3M™ aerospace products Coast-Line regularly stocks. Use the navigation above to jump directly to the product family you need.

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3MTM Solutions for Every Stage of Aircraft Production

From structural assembly to MRO, 3MTM engineers products that address the full aircraft lifecycle. Coast-Line stocks the materials your program needs, ready to ship.

Scotch-Weld™ Structural Adhesives

Two-Part & One-Part Structural Adhesives

3M™ Scotch-Weld™ structural adhesives are the industry standard for high-strength bonding of metals, composites, and plastics in aerospace assembly and repair. Epoxy, urethane, and acrylic chemistries cover every combination of substrate, temperature requirement, and work-life need — from rapid field repair to primary bond joints qualified to BMS specifications.

Key Points

Key Point 01
Replace Fasteners & Welds
Even stress distribution over the entire bond area eliminates fatigue cracks at rivet holes and weld toes. Reduces part count, structural weight, and corrosion initiation sites.
Key Point 02
Cryogenic to High-Temperature
EC-2216 is rated to −423°F (−252°C) — the only Scotch-Weld product qualified for cryogenic bonding. Heat-cured film and paste grades extend service to +350°F covering the full aerospace thermal envelope.
Key Point 03
FST-Compliant Interior Grades
EC-7246-2 FST and EC-9356 FST are qualified to FAR 25.853 fire/smoke/toxicity requirements for use in aerospace interior structural assemblies where cabin compliance is mandatory.
Key Point 04
Flexible or Rigid Bond Lines
Urethane formulations (EC-3587, DP6310NS) absorb vibration and accommodate thermal expansion between dissimilar materials. Rigid epoxy grades maximize shear strength for static structural joints.
Key Point 05
EPX™ Applicator System
3M's EPX duo-pak cartridge system simultaneously meters and mixes two-part adhesives at the point of application — consistent mix ratio, minimal waste, available in handheld and automated formats.
Key Point 06
Liquid Shim Capability
EC-7272 Advanced Liquid Shim fills gaps between mating aircraft structural parts, eliminating the need for machined metal shims. Reduces assembly time and rework on close-tolerance structural interfaces.

Featured Products

EC-2216 B/A
Flexible epoxy. Cryogenic rated to −423°F. 90-min work life. Up to 3,200 psi lap shear. AS9100 aerospace-qualified version (EC-2216) available separately.
Flexible Epoxy
EC-1751 B/A
Aluminum-filled non-sag paste. 45-min work life. Void-filling. Replaces rivets, spot welds, and screws on exterior metal-to-metal aerospace structure.
Filled Epoxy
EC-7246-2 B/A FST
Structural epoxy fully qualified to FAR 25.853 fire/smoke/toxicity. Two-part, heat cure. Designed specifically for aerospace interior structural use.
FST Epoxy
EC-9356 B/A FST
Two-part FST-compliant structural adhesive for transportation and aerospace interior assemblies. Room-temp or heat-accelerated cure available.
FST Structural
EC-7272 B/A
Advanced Liquid Shim. Fills structural gaps between mating parts — eliminates machined metal shimming. 30-min work life. −65°F to +300°F service.
Liquid Shim
EC-3333 B/A
Toughened two-part epoxy. 1:1 mix ratio. Room-temperature cure. High shear strength. Metal and composite structural assembly in aerospace and general industrial use.
Toughened Epoxy
EC-3587 B/A
Flexible urethane adhesive. Excellent peel strength on composites. Accommodates thermal expansion between dissimilar materials in aerospace panel bonding.
Urethane
DP6310NS
Multi-material urethane. Bonds composites, metals, plastics, and wood. Non-sag. Replaces rivets. Accommodates differential thermal expansion without priming on many substrates.
Multi-Material
RP-2220
Repair Paste. 5-min work life. 48.5 mL cartridge format. Structural strength for fast field and MRO repair — no mixing equipment required.
Repair Paste
Specifications — EC-2216 B/A (Representative Values)
ChemistryTwo-part flexible epoxy
Mix Ratio2 : 1 by volume (B/A)
Work Life @ 72°F90 minutes
Handling Strength~24 hrs @ 72°F
Full Cure (RT)7 days (or 30 min @ 200°F)
Lap Shear Strength @ 72°F3,200 psi
Min Service Temperature−423°F (−252°C)
Max Service Temperature+250°F (+121°C)
ColorTranslucent / Gray
FormatDuo-Pak cartridge / Bulk
Aerospace Qualified VersionEC-2216 (AS9100 per BMS)
Selection Guide — By Requirement
Maximum shear strength on metalEC-2216 / EC-1751
Cryogenic service (below −100°F)EC-2216 only
FST-required interior assemblyEC-7246-2 FST
Long repositioning time neededEC-2216 (90 min)
Structural gap or shim fillingEC-7272 Liquid Shim
Dissimilar materials / vibrationEC-3587 / DP6310NS
Fast MRO / field repairRP-2220 Repair Paste
High-temp service (+250°F+)EC-2615 B/A
Note: All values are representative typical data only. Consult the individual 3M Technical Data Sheet before qualifying or specifying. Contact Coast-Line for BMS specification matching, C of C documentation, and lot traceability.

Scotch-Weld™ AF Series

Structural Adhesive Films

3M™ Structural Adhesive Films deliver the controlled bondline thickness, uniform adhesive distribution, and process repeatability that primary structural assemblies demand. Used extensively in commercial and military aircraft for honeycomb panel closeout, composite skin bonding, and co-cure applications — where paste adhesives cannot provide the consistency that safety-critical joints require. 

Key Points

Key Point 01
Precise, Repeatable Bondline
Film format delivers consistent adhesive thickness across the full bonded area — critical for load distribution in honeycomb sandwich structures and primary composite assemblies.
Key Point 02
Co-Cure Capable
Selected grades co-cure with prepreg at 250°F or 350°F in a single autoclave cycle, eliminating the secondary bonding step and reducing overall manufacturing time and cost.
Key Point 03
30+ Grades
Range of areal weights (.050–.130 lb/ft²), cure temperatures, and supported/unsupported constructions. Match the exact grade to your program specification, process, and lay-up schedule.

Featured AF Series Products

AF 143-2
.100 wt, 40 in × 50 yd. Primary bond joints, honeycomb panel closeout. 250°F or 350°F cure. Scrim-supported. Most widely used in commercial airframe assembly.
Film
AF 130-2
.090 wt structural film for composite and metal panel assemblies. Available in 250°F and 350°F cure variants to match autoclave process temperature.
Film
AF 555
High-toughness film for demanding primary and secondary bond joints. Superior mode-I fracture toughness (GIc). 250°F cure. Preferred for high-peel-load applications.
Film
AF 3002
Structural Core Splice Film. Designed specifically for core-to-core splicing in honeycomb sandwich panel construction and depot-level composite repair operations.
Core Splice
AF 126
Structural film adhesive for metal and composite laminate assemblies. Multiple areal weight options and roll widths available to match production panel and lay-up schedules.
Film
AF 6
Lightweight supported film for lower-loaded secondary bonding. Composite skin attachment, stiffener bonding, and non-critical panel assembly where weight savings matter.
Film
Specifications — AF 143-2 (Representative Values)
ChemistryModified epoxy film
Areal Weight.100 lb/ft²
Roll Width40 in standard (other widths available)
Cure Temperature250°F or 350°F options
Cure PressureVacuum bag or autoclave
Service Temperature−67°F to +250°F
ConstructionSupported (scrim carrier)
Out-life @ 75°F10 days (check TDS)
StorageFrozen at ≤−10°F (14°F)
Shelf Life (frozen)12 months from date of manufacture
Selection Guide — By Application
Metal honeycomb primary bondAF 143-2
Composite structural panelsAF 130-2 / AF 555
High-peel / fracture toughness req.AF 555
Co-cure at 350°F with prepregAF 143-2 / AF 130-2
Core-to-core splice or repairAF 3002 Core Splice
Lightweight secondary bondAF 6
Frozen Storage Required: All AF Series film adhesives must be stored at ≤−10°F. Allow sealed packaging to reach ambient temperature before opening. Track out-life carefully — exceeding out-time voids qualification. Coast-Line handles cold-chain storage and can confirm remaining out-life at time of shipment.

3M™ Aerospace Polysulfide Sealants

Fuel-Resistant Structural & Faying Surface Sealants

3M™ Aerospace polysulfide sealants protect fuel tank interfaces, pressure vessel seams, and structural faying surfaces from fluid ingress, pressure loss, and corrosion — meeting the fuel resistance, flexibility, and qualification requirements that commercial and military airframe programs demand. Available in multiple cure rates and packaging configurations to suit production or MRO use.

Key Points

Key Point 01
Jet Fuel & Hydraulic Fluid Resistance
Outstanding resistance to Jet A, Avgas, Skydrol hydraulic fluid, and lubricating oils — qualified for faying surface, fillet, and injection sealing in integral fuel tanks.
Key Point 02
Multiple Cure Rates
Fast, standard, and extended application-life formulations. Match working time precisely to your production throughput, MRO window, or environmental conditions.
Key Point 03
Spec Qualified
Grades qualified to Boeing BMS, Airbus AIMS, and MIL-PRF-81733. Coast-Line identifies the correct qualified material for your specification and provides full C of C documentation.
Application Types
  • Faying surface sealing — primary and secondary fuel tank joints
  • Fillet sealing — bead seals at structural edges, frames, and fastener rows
  • Injection sealing — fastener holes, blind areas, and confined locations
  • Pressure sealing — cabin, hydraulic, and pneumatic interface joints
  • Nacelle and thrust reverser edge and overlap sealing
  • Windshield, canopy, and transparency perimeter sealing
  • Wing-to-fuselage and structural panel edge protection
Application Process
  1. 1Surface preparation: degrease, abrade if required, re-degrease per sealant TDS specification.
  2. 2Mix base and accelerator in the correct ratio per TDS. Mix thoroughly for the specified time.
  3. 3Apply within the application life window using brush, spatula, gun, or injection equipment as appropriate for the joint type.
  4. 4Allow full cure per TDS before pressurization, fuel exposure, or structural load application.
Typical Sealant Properties
ChemistryTwo-part polysulfide polymer
Application MethodsFaying surface, fillet, injection
Fuel ResistanceExcellent — Jet A / Avgas / Skydrol
Service Temperature Range−65°F to +250°F
Flexibility (cured)High — elongation typically >200%
Cure Rates AvailableFast / Standard / Extended
PackagingDual cartridge / Can / Drum
SpecificationsBMS, AIMS, MIL-PRF-81733
Specification Procurement: Polysulfide sealants are typically specified and purchased to BMS, AIMS, or MIL-PRF number. Provide your specification reference and revision when requesting a quote — Coast-Line will confirm the qualified product and supply full documentation.

3M™ Aerospace Abrasive Systems

Abrasives for Composite & Metal Surface Preparation

3M™ aerospace abrasive systems cover every surface preparation operation in production and MRO — from initial paint stripping and composite edge trimming to pre-bond surface preparation and final finish polishing. Precision-shaped grain technology and purpose-built constructions deliver consistent cut rates, longer service life, and lower cost per part versus conventional abrasives.

Key Points

Key Point 01
Precision-Shaped Grain
3M™ Cubitron™ II ceramic mineral cuts faster, cooler, and longer than conventional fused alumina — reducing heat buildup in composite substrates and extending disc and belt life significantly.
Key Point 02
Composite-Safe Formulations
Purpose-built constructions for CFRP and fiberglass minimize delamination risk, fiber pullout, and heat generation during trimming and surface preparation operations.
Key Point 03
Lower Cost Per Part
Premium abrasive constructions consistently outlast standard alternatives — fewer changeovers, less downtime, and reduced per-part cost when total consumable spend is calculated.
Product Forms Available
  • Fiber discs and PSA discs — random orbital and angle grinder use
  • Hookit™ discs — hook-and-loop for easy changeover on production lines
  • Abrasive belts — endless and open-end for belt sanding equipment
  • Cut-off and grinding wheels — metal fabrication and edge clean-up
  • Scotch-Brite™ non-woven discs — deburring, conditioning, pre-bond surface prep
  • Roloc™ discs — small-diameter spot work, access areas
  • Hand pad and sheet formats — manual surface preparation and finishing
Selection Guide — By Operation
Paint stripping — aluminumScotch-Brite™ Roloc™ coarse / belts
Paint stripping — compositeNon-woven wheels, fine-grit discs
Pre-bond surface prepScotch-Brite™ conditioning discs
Composite edge trimmingCarbide burrs, fine ceramic discs
Metal deburring & blendingScotch-Brite™ non-woven hand pads
Sealant removalNon-woven wheels / plastic scrapers
Final finish before paintingFine-grit film discs, wet/dry sheets
High-production throughputCubitron™ II belts and fibre discs

3M™ Aerospace Process & Specialty Tapes

High-Temperature, Masking & Surface Protection Tapes

3M™ aerospace process tapes cover the full range of manufacturing and MRO taping requirements — from autoclave-rated polyimide and PTFE process tapes that survive 350°F cure cycles, to FST-rated sealing tapes for interior structures and foil tapes for EMI shielding and lightning strike protection. Clean, residue-free removal is engineered into every construction.

Key Points

Key Point 01
Autoclave Rated
Polyimide and PTFE constructions withstand autoclave and oven cure at 350°F+ without adhesive transfer, deformation, or print-through onto composite surfaces.
Key Point 02
Clean Removal
All process tapes are engineered for clean, residue-free removal after cure cycles on both composite and metallic substrates — no surface re-cleaning required after de-taping.
Key Point 03
FST & EMI Options
3M 9143FR sealing tape meets FAR 25.853 fire/smoke/toxicity requirements. Aluminum foil and copper foil tapes provide EMI/RFI shielding and lightning strike protection in composite structures.
Polyimide (Kapton-type)
Rated to 500°F+. Autoclave masking, composite process taping, high-temperature electrical insulation, and circuit board protection during soldering.
High-Temp
PTFE Release Tape
Non-stick release liner for composite lay-up, press platens, and mold surfaces. Withstands autoclave cure temperatures with no adhesive contamination.
Release
3M 501 High-Temp Masking
Purple crepe-paper masking tape rated to 300°F. Designed for paint oven and primer masking on metal and composite aerospace structures. Clean removal after baking.
300°F
Aluminum Foil Tape
Electrically conductive aluminum foil for EMI/RFI shielding, heat reflection, lightning strike protection, and sealing duct and insulation systems in airframes.
EMI / Foil
3M 9143FR Sealing Tape
FST-rated interior sealing tape qualified to FAR 25.853. For sealing gaps and joints in aerospace interior panels, liners, and insulation blanket systems.
FST Rated
Surface Protection Films
Temporary scratch and impact protection films for finished composite and metal surfaces through assembly, shipping, and storage. Peel off cleanly with no residue.
Protection
Selection Guide — By Temperature and Use
Autoclave / oven process (350°F+)Polyimide / PTFE tapes
Paint oven masking (to 300°F)3M 501 High-Temp Masking
Engine bay / nacelle maskingAluminum foil / PTFE tape
Room-temperature assembly maskingScotch® Aerospace masking tape
Interior FST sealing (FAR 25.853)3M 9143FR Sealing Tape
EMI / lightning strike protectionAluminum or copper foil tape
Surface scratch protection3M Surface Protection Films

3M™ Adhesion Promoters & Primers

Bond Primers & Adhesion Promoters for Structural Joints

Adhesion promoters and corrosion-inhibiting primers are the first — and often most critical — step in any structural bond joint. 3M™ AP86A and the EW-5000 series are called out by Boeing BMS, Airbus AIMS, and military specifications as the required surface treatment before applying structural adhesives and film adhesives to aluminum, titanium, and composite structures. They significantly increase long-term bond durability and environmental resistance.

Key Points

Key Point 01
Maximizes Long-Term Bond Durability
Primers chemically couple the substrate surface to the adhesive, dramatically improving bond strength retention after humid aging, thermal cycling, and fluid exposure compared to untreated surfaces.
Key Point 02
Corrosion Inhibiting
EW-5000 series provides a sacrificial barrier layer on aluminum and titanium — protecting the metal substrate at the bond interface and extending structural joint service life in aggressive service environments.
Key Point 03
Specification-Called-Out Products
AP86A and EW-5000 are specifically named in Boeing BMS, Airbus AIMS, and military procurement documents. Using the spec-called product ensures qualification compliance and audit traceability.
AP86A
Widely specified adhesion promoter for metals and composites. Solvent-based thin film. Significantly improves peel and shear strength and long-term environmental durability of structural adhesive joints.
Adhesion Promoter
EW-5000 Series
Corrosion-inhibiting structural bond primer for aluminum and titanium substrates. BMS-qualified. Used before EC-2216, EC-1751, and AF film adhesives on primary structural joints.

Corrosion-Inhibiting Primer
EC-1945
Adhesion promoter for difficult-to-bond substrates including select engineering plastics and composites where standard surface preparation alone is insufficient to achieve structural-grade bond performance.
Specialty Promoter
When to Specify a Primer
  • Any safety-critical structural joint where long service life is required
  • Joints exposed to humidity, aviation fluids, or repeated thermal cycling
  • Anodized, chromated, or conversion-coated aluminum surfaces
  • Titanium and high-strength steel primary structural bonds
  • Composite surfaces after peel-ply removal or mechanical abrasion prep
  • When the adhesive TDS or applicable BMS/AIMS specification requires it
  • MRO repair joints that must meet the same standard as original production bonds
Application Process
  1. 1Surface preparation: Degrease, abrade, and re-degrease per the adhesive TDS. Primed surfaces must be clean and dry — contamination cannot be remedied by primer alone.
  2. 2Primer application: Apply in a thin, uniform coat by brush, spray, or lint-free wipe as specified. Avoid pooling, runs, or heavy buildup — a thin film bonds; a thick film can actually reduce strength.
  3. 3Primer cure: Allow full cure per TDS — typically 30 min to 2 hrs at room temperature, or accelerated with mild heat (approx. 150°F). Do not start cure timer until solvent flash-off is complete.
  4. 4Adhesive application: Apply adhesive within the primed surface open-time window specified in the TDS. Exceeding open time requires re-priming — do not proceed on an expired surface.
Compatibility: Always verify primer–adhesive system compatibility in the adhesive TDS before use. Not all primers are suitable for all adhesive systems. Confirm your specific combination with Coast-Line or the relevant 3M TDS.

All product data shown are representative typical values only. Consult the individual 3M Technical Data Sheet before qualifying or specifying any product. 3M™, Scotch-Weld™, Cubitron™, Scotch-Brite™, Roloc™, Hookit™, and Nextel™ are trademarks of 3M Company. Coast-Line International · 200 Dixon Avenue, Amityville, NY 11701 · 1-800-645-3523

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