3M Aerospace3M™ Scotch-Weld™ Advanced Liquid Shim EC-7272 B/A

Optimise shimming processes with a new high-strength, fast-curing, injectable liquid shim:

• Fill gaps up to 3mm• Cures to drilling strength within 4-5 hours at room temperature• Superior fatigue resistance• Non sag in vertical applications• Easy and accurate injection application

3

Stress out ofTake the

Aero-Structures

As the demand for aircraft reaches new heights, the pressure is on suppliers to develop

solutions that increase manufacturing productivity without compromising performance.

3M™ Scotch-Weld™ Advanced Liquid Shim EC-7272 B/AFor the last 6 years, 3M Aerospace has been engineering a sophisticated epoxy-based liquid shim that offers superior structural gap filling properties

up to 3mm, thereby significantly reducing the need for hard shims. 3M™ Scotch-Weld™ Advanced Liquid Shim EC-7272 B/A is a single, injectable,

fast-curing solution designed to deliver an increase in productivity and overall cost reduction.

Curing to drilling strength* within 4-5 hours at room temperature without excessive exothermicity, Scotch-Weld EC-7272 B/A combines excellent

toughness and high compressive strength while increasing production throughput. The rheology of the liquid shim has been specifically engineered to

balance the need for precise and fast injection with minimal slump thereby enabling application versatility.

Technical Properties

• Fills gaps up to 3mm

• Shore D hardness of 82 after 4 hours at room temperature*

• Superior fatigue resistance

• Non sag in vertical applications

• Excellent chemical and environmental resistance

• Easy injectable application

• Extrudable from duo-pack cartridges for easy and

accurate mixing

Shimming ProcessesShimming materials are required to fill small gaps in rib-to-skin

and other load-bearing aero-structure applications in order to

reduce stress and premature fatigue cracking of the assembly.

Aside from the costly and complex management of hundreds of

bespoke sizes, traditional hard shims are time-consuming and

labour-intensive to apply.

Dispensing Equipment3M Scotch-Weld Advanced Liquid Shim EC-7272 B/A can be dispensed manually and pneumatically using the following equipment.

Storage DetailsStore at room temperature. Shelf life is 6 months from date of shipment in the original unopened containers.

to PerformDesigned

* Shore D hardness of 82 achieved after 4 hours at 23 °C ± 2 °C, 50 % ± 5 % relative humidity. The test was conducted using 50 g of mixed material on a disc of 70 mm diameter and 10 mm height and was determined according to ISO 868.

1 2 4 6 12

Hours

Shor

e D

Hard

ness

90

85

80

75

70

65

Shore D hardness was determined according to ISO 868 in two conditions using 50 g of mixed material on a disc of 70 mm diameter and 10 mm height.

Condition 1: 23 °C ± 2 °C, 50 % ± 5 % relative humidity

Condition 2: 30 °C ± 2 °C, 50 % ± 5 % relative humidity

Duo-Pak Cartridge Size Manual Dispenser Pneumatic Dispenser Preferred Nozzle

50ml3M™ Scotch-Weld™ EPX Manual

Dispenser ll 50mlNot Applicable

3M™ Scotch-Weld™ EPX Structural Adhesive Nozzle 7 Element

200ml3M™ Performance Manual

Applicator 081173M™ Performance Pneumatic

Applicator 099303M™ Static Mixing Nozzle 08193

400ml Not Applicable3M™ Scotch-Weld™ EPX Pneumatic

Applicator3M™ Static Mixing Nozzle 08193

3M™ Scotch-Weld™ EPX Manual Dispenser II 50ml

3M™ Performance Manual Applicator 08117

3M™ Performance Pneumatic Applicator 09930

3M™ Scotch-Weld™ EPX Pneumatic Applicator

3M™ Static Mixing Nozzle 08193

3M™ Scotch-Weld™ EPX Structural Adhesive Nozzle 7

Element

Shimming materials are required in load-bearing applications and structures designed to have flexibility, such as fixed wings, in order to prevent premature fatigue cracking and increase fatigue resistance of the part.

Aerospace and Commercial Transportation Division 3M United Kingdom plc3M CentreCain Road, BracknellBerkshire RG12 8HTTel: +44 (0) 845 604 6395 www.3M.co.uk/aerospace

3M Ireland LimitedThe Iveagh BuildingThe Park, CarrickminesDublin 18Tel: 00 353 1 280 3555 Fax: 00 353 1 280 3509

Product Use: Many factors beyond 3M’s control and uniquely within user’s knowledge and control can affect the use and performance of a 3M product in a particular application. Given the variety of factors that can affect the use and performance of a 3M product, user is solely responsible for evaluating the 3M product and determining whether it is fit for a particular purpose and suitable for user’s method of application.

3M and Scotch-Weld are trademarks of 3M CompanyPlease recycle. Printed in the United Kingdom.© 3M 2014. All rights reserved.03M87543