Loctite EA 9321 AERO — also known as Hysol EA 9321, Loctite 9321, and two-part aerospace epoxy paste adhesive — is a premium 2-component thixotropic structural paste adhesive by Henkel Loctite Aerospace that exhibits exceptional toughness and retains bond strength at elevated temperatures. Unlike single-part adhesives or standard industrial epoxies, EA 9321 AERO uses a two-component chemistry — a grey Part A epoxy resin and an off-white Part B hardener, combined at a 100:50 ratio by weight — that cures at room temperature to produce durable, structural bonds over a wide service temperature range from -67°F (-55°C) up to 400°F (204°C).
The Loctite EA 9321 AERO Quart Kit delivers a tensile lap shear strength of 4,000 psi (27.6 MPa) at 77°F on 2024-T3 AlClad aluminium substrates per ASTM D1002, and is approved to Boeing HMS16-1068 Class 12 and Airbus CML 08-010D — making it one of the most widely specified aerospace epoxy paste adhesives in the world. It is the go-to structural bonding adhesive for aerospace structures, composite bonding, and high-performance industrial assemblies where elevated temperature resistance and structural integrity are critical. Maisam Trading LLC is the authorised Loctite supplier in Dubai and the trusted source for Loctite EA 9321 AERO across the UAE, Saudi Arabia, Qatar, Oman, Kuwait, and Bahrain — with refrigerated stock maintained for prompt delivery across the entire GCC region.
Loctite EA 9321 AERO is the benchmark aerospace epoxy paste adhesive for structural bonding applications in aviation, defence, and high-performance engineering environments. Available from Maisam Trading LLC Dubai, this room temperature cure two-part epoxy paste is engineered to deliver tough, durable bonds that retain structural integrity across an exceptionally wide temperature range — from cryogenic conditions at -67°F (-55°C) through to service temperatures up to 250°F (121°C) at the 1,000 psi retention threshold. The product’s thixotropic paste consistency prevents flow and slumping after application, ensuring precise bead placement and bond line control even on vertical and overhead surfaces.
Mixing is performed by combining Part A and Part B at a 100:50 ratio by weight — weight measurement is essential for structural applications, as volume measurement is not recommended. Thoroughly mix the two components and apply immediately. The pot life is approximately 40 minutes for a 450 gram mass at 77°F — do not mix quantities greater than 450 grams due to the risk of dangerous exothermic heat build-up. Bonding surfaces must be clean, dry, and properly prepared per the Loctite Surface Preparation Guide. Handling strength is achieved in 24 hours at room temperature; full cure in 5 to 7 days at 77°F, or accelerated with 1 hour at 180°F (82°C). Cleanup of uncured adhesive is possible with denatured alcohol or common industrial solvents.
This is an industrial product — for industrial use only. Always read the full Material Safety Data Sheet before handling. Use adequate ventilation, appropriate PPE, and protective gloves. As a trusted aerospace epoxy paste adhesive GCC supplier, Maisam Trading LLC maintains refrigerated stock of Loctite EA 9321 AERO for prompt delivery across Dubai, Saudi Arabia, Qatar, Oman, Kuwait, and Bahrain.
| Property | Part A | Part B | Mixed |
|---|---|---|---|
| Appearance | Grey | Off-White | Grey |
| Viscosity @ 77°F | 2,900–7,100 Poise | 200–800 Poise | — |
| Density (g/ml) | 1.24 | 1.22 | 1.23 |
| Mix Ratio by Weight | 100 | 50 | — |
| Pot Life (450g @ 77°F) | — | — | 40 minutes |
| Cured Property | Specification |
|---|---|
| Tensile Lap Shear @ -67°F (-55°C) | 3,000 psi / 20.7 MPa (RT cure) |
| Tensile Lap Shear @ 77°F (25°C) | 4,000 psi / 27.6 MPa |
| Tensile Lap Shear @ 180°F (82°C) | 2,900 psi / 20.0 MPa (RT cure) |
| Service Temperature (1,000 psi retention) | 250°F (121°C) |
| Tensile Strength | 7,100 psi / 49.0 MPa |
| Tensile Modulus | 420 ksi / 2.90 GPa |
| Elongation at Break | 6% |
| Shore D Hardness | 84 |
| Tg Dry | 230°F (110°C) |
| Tg Wet | 190°F (88°C) |
| Compressive Strength (Yield) | 9,280 psi / 64.00 MPa |
| Compressive Strength (Ultimate) | 16,880 psi / 116.42 MPa |
| Dielectric Constant (1 KHz) | 4.81 |
| Handling Strength | 24 hours @ 77°F (25°C) |
| Full Cure (RT) | 5–7 days @ 77°F (25°C) |
| Accelerated Cure | 1 hour @ 180°F (82°C) |
| Shelf Life @ <40°F (4°C) | 1 year (Part A & B) |
| Shelf Life @ <77°F (25°C) | 3 months (Part A) / 1 year (Part B) |
| Storage Requirement | Refrigerated — below 40°F (4°C) |
| Pack Size | Quart Kit (1 USQ Part A + 1 USQ Part B) |
| Boeing Approval | HMS16-1068 Class 12 |
| Airbus Approval | CML 08-010D |
| Manufacturer | Henkel Corporation Aerospace, USA |
| Also Known As | Hysol EA 9321 |
| Supplier in UAE / GCC | Maisam Trading LLC, Dubai |
Q1: What is Loctite EA 9321 AERO used for? Loctite EA 9321 AERO (Hysol EA 9321) is a 2-part thixotropic epoxy paste adhesive used for structural bonding in aerospace, defence, and high-performance industrial applications. It bonds aluminium, composites, and aerospace alloys with a tensile lap shear strength of 4,000 psi at room temperature, and retains structural integrity up to 250°F (121°C). For industrial use only.
Q2: What is the difference between Loctite EA 9321 AERO and regular epoxy adhesive? Unlike standard industrial epoxies, EA 9321 AERO is a certified aerospace-grade thixotropic paste adhesive approved to Boeing HMS16-1068 Class 12 and Airbus CML 08-010D. It provides superior toughness at elevated temperatures, maintains strength from -67°F to 250°F (1,000 psi retention), and has been tested to ASTM standards on aerospace aluminium substrates.
Q3: How is Loctite EA 9321 AERO mixed and applied? Combine Part A and Part B at a 100:50 ratio by weight — weight measurement is essential for structural applications. Mix thoroughly. Do not mix more than 450 grams at a time due to the risk of dangerous exothermic heat build-up. Apply to clean, dry, properly prepared surfaces and hold in contact until set. Handling strength occurs in 24 hours at 77°F.
Q4: What is the cure schedule for Loctite EA 9321 AERO? It achieves handling strength in 24 hours at 77°F (25°C). Full cure is achieved in 5 to 7 days at room temperature, or accelerated with 1 hour at 180°F (82°C) for smaller masses only.
Q5: Does Loctite EA 9321 AERO require refrigerated storage? Yes. Part A has a shelf life of 3 months at below 77°F (25°C) and 1 year at below 40°F (4°C). Part B has a shelf life of 1 year at below 77°F. Maisam Trading LLC maintains refrigerated storage for EA 9321 AERO to ensure product integrity on delivery.
Q6: What are the Boeing and Airbus approvals for EA 9321 AERO? Loctite EA 9321 AERO is approved to Boeing HMS16-1068 Class 12 and Airbus CML 08-010D — making it one of the most widely certified aerospace structural epoxy paste adhesives available.
Q7: Where can I buy Loctite EA 9321 AERO in the UAE or GCC? Maisam Trading LLC is a trusted Loctite supplier in Dubai with refrigerated stock of Loctite EA 9321 AERO. Contact +971521672252 or email sales@maisamdubai.com. We supply across UAE, Saudi Arabia, Qatar, Oman, Kuwait, and Bahrain.
Q8: Is bulk purchasing available? Yes. Maisam Trading LLC offers competitive pricing for bulk and B2B orders across the GCC. Contact our sales team for a customised quote.
Loctite EA 9321 AERO Epoxy Paste Adhesive Quart Kit is available across Dubai and all major GCC industrial and aerospace supply networks through Maisam Trading LLC. Refrigerated storage maintained.
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