Technical Data Sheet

LOCTITE 243January-2008

PRODUCT DESCRIPTIONLOCTITE 243 provides the following productcharacteristics:Technology AcrylicChemical Type Dimethacrylate esterAppearance (uncured) Blue liquidLMSFluorescence Positive under UV lightLMSComponents One component - requires no mixingViscosity Medium, thixotropicCure AnaerobicSecondary Cure ActivatorApplication ThreadlockingStrength Medium

LOCTITE 243 is designed for the locking and sealing ofthreaded fasteners which require normal disassembly withstandard hand tools. The product cures when confined in theabsence of air between close fitting metal surfaces andprevents loosening and leakage from shock and vibration.Particularly suitable for applications on less active substratessuch as stainless steel and plated surfaces, wheredisassembly with hand tools is required for servicing. Thethixotropic nature of LOCTITE 243 reduces the migration ofliquid product after application to the substrate.

NSF InternationalCertified to ANSI/NSF Standard 61 for use in commercial andresidential potable water systems not exceeding 82 C.

TYPICAL PROPERTIES OF UNCURED MATERIALSpecific Gravity @ 25 C 1.08Flash Point - See MSDSViscosity, Brookfield - RVT, 25 C, mPas (cP):

Spindle 3, speed 20 rpm 1,300 to 3,000LMSViscosity, EN 12092 - MV, 25 C, after 180 s, mPas (cP):

Shear rate 129 s-1 350

TYPICAL CURING PERFORMANCE

Cure Speed vs. SubstrateThe rate of cure will depend on the substrate used. The graphbelow shows the breakaway strength developed with time onM10 steel nuts and bolts compared to different materials andtested according to ISO 10964.

% o

f Ful

l Str

engt

h on

Ste

el

Cure Time

100

75

50

25

01min 5min 10min 30min 1h 3h 6h 24h 72h

Stee

l

Bras

s

Zinc

dich

rom

ate

Stainless steel

Cure Speed vs. Bond GapThe rate of cure will depend on the bondline gap. Gaps inthreaded fasteners depends on thread type, quality and size.The following graph shows shear strength developed with timeon steel pins and collars at different controlled gaps and testedaccording to ISO 10123.

% o

f Ful

l Str

engt

h on

Ste

el

Cure Time

100

75

50

25

01min 5min 10min 30min 1h 3h 6h 24h 72h

0.15

mm

0.2

mm

0.05 m

m

Cure Speed vs. TemperatureThe rate of cure will depend on the temperature. The graphbelow shows the breakaway strength developed with time atdifferent temperatures on M10 steel nuts and bolts and testedaccording to ISO 10964.

% o

f Ful

l Str

engt

h on

Ste

el

Cure Time

100

75

50

25

01min 5min 10min 30min 1h 3h 6h 24h 72h

22 C

5 C

40 C

TDS LOCTITE 243, January-2008

Cure Speed vs. ActivatorWhere cure speed is unacceptably long, or large gaps arepresent, applying activator to the surface will improve curespeed. The graph below shows the breakaway strengthdeveloped with time on M10 zinc dichromate steel nuts andbolts using Activator 7471 and 7649 and tested accordingto ISO 10964.

% o

f Ful

l Str

engt

h on

Ste

el

Cure Time

100

75

50

25

01min 5min 10min 30min 1h 3h 6h 24h 72h

Activator 7471

Activator 7649

No ac

tivator

TYPICAL PROPERTIES OF CURED MATERIALPhysical Properties:

Coefficient of Thermal Expansion, ISO 11359-2, K-1

8010-6

Coefficient of Thermal Conductivity, ISO 8302,W/(mK)

0.1

Specific Heat, kJ/(kgK) 0.3

TYPICAL PERFORMANCE OF CURED MATERIALAdhesive Properties

Cured for 24 hours @ 22 CBreakaway Torque, ISO 10964:

M10 steel nuts and bolts Nm 20 (lb.in.) (180)

Prevail Torque, ISO 10964:M10 steel nuts and bolts Nm 7

(lb.in.) (60)

Breakloose Torque, ISO 10964, Pre-torqued to 5 Nm:M10 steel nuts and bolts Nm 24

(lb.in.) (210)

Max. Prevail Torque, ISO 10964, Pre-torqued to 5 Nm:M10 steel nuts and bolts Nm 24

(lb.in.) (210)

Compressive Shear Strength, ISO 10123:Steel pins and collars N/mm 7.6LMS

(psi) (1,100)

TYPICAL ENVIRONMENTAL RESISTANCECured for 1 week @ 22 C

Breakloose Torque, ISO 10964, Pre-torqued to 5 Nm:M10 zinc phosphate steel nuts and bolts

Hot StrengthTested at temperature

% S

tren

gth

@ 2

2 C

Temperature, C

100

75

50

25

00 50 100 150

Heat AgingAged at temperature indicated and tested @ 22 C

% In

itial

Str

engt

h @

22

C

Exposure Time, hours

125

100

75

50

25

00 1000 2000 3000 4000 5000

100 C

120 C

150 C

Chemical/Solvent ResistanceAged under conditions indicated and tested @ 22 C. % of initial strengthEnvironment C 100 h 500 h 1000 h 5000 hMotor oil 125 95 95 95 95Gasoline 22 100 100 95 95Brake fluid 22 100 100 100 100Water/glycol 50/50 87 95 80 80 80Acetone 22 100 100 85 85Ethanol 22 100 85 85 85

GENERAL INFORMATIONThis product is not recommended for use in pure oxygenand/or oxygen rich systems and should not be selected asa sealant for chlorine or other strong oxidizing materials

For safe handling information on this product, consult theMaterial Safety Data Sheet (MSDS).

Where aqueous washing systems are used to clean thesurfaces before bonding, it is important to check forcompatibility of the washing solution with the adhesive. Insome cases these aqueous washes can affect the cure andperformance of the adhesive.

Henkel Americas+860.571.5100

Henkel Europe+49.89.320800.1800

Henkel Asia Pacific+86.21.2891.8863

For the most direct access to local sales and technical support visit: www.henkel.com/industrial

TDS LOCTITE 243, January-2008

This product is not normally recommended for use on plastics(particularly thermoplastic materials where stress cracking ofthe plastic could result). Users are recommended to confirmcompatibility of the product with such substrates.

Directions for useFor Assembly

1. For best results, clean all surfaces (external and internal)with a LOCTITE cleaning solvent and allow to dry.

2. If the material is an inactive metal or the cure speed is tooslow, spray all threads with Activator 7471 or 7649 and allow to dry.

3. Shake the product thoroughly before use.4. To prevent the product from clogging in the nozzle, do not

allow the tip to touch metal surfaces during application.5. For Thru Holes, apply several drops of the product onto

the bolt at the nut engagement area.6. For Blind Holes, apply several drops of the product down

the internal threads to the bottom of the hole.7. For Sealing Applications, apply a 360 bead of product

to the leading threads of the male fitting, leaving the firstthread free. Force the material into the threads tothouroughly fill the voids. For bigger threads and voids,adjust product amount accordingly and apply a 360 beadof product on the female threads also.

8. Assemble and tighten as required.

For Disassembly1. Remove with standard hand tools.2. In rare instances where hand tools do not work because

of excessive engagement length, apply localized heat tonut or bolt to approximately 250 C. Disassemble whilehot.

For Cleanup1. Cured product can be removed with a combination of

soaking in a Loctite solvent and mechanical abrasionsuch as a wire brush.

Loctite Material SpecificationLMSLMS dated September-01, 1995. Test reports for each batchare available for the indicated properties. LMS test reportsinclude selected QC test parameters considered appropriate tospecifications for customer use. Additionally, comprehensivecontrols are in place to assure product quality andconsistency. Special customer specification requirements maybe coordinated through Henkel Quality.

StorageStore product in the unopened container in a dry location. Storage information may be indicated on the product containerlabeling.Optimal Storage: 8 C to 21 C. Storage below 8 C orgreater than 28 C can adversely affect product propertiesMaterial removed from containers may be contaminated duringuse. Do not return product to the original container. HenkelCorporation cannot assume responsibility for product whichhas been contaminated or stored under conditions other thanthose previously indicated. If additional information is required,please contact your local Technical Service Center orCustomer Service Representative.

Conversions(C x 1.8) + 32 = FkV/mm x 25.4 = V/milmm / 25.4 = inchesm / 25.4 = milN x 0.225 = lbN/mm x 5.71 = lb/inN/mm x 145 = psiMPa x 145 = psiNm x 8.851 = lbinNm x 0.738 = lbftNmm x 0.142 = ozinmPas = cP

NoteThe data contained herein are furnished for information onlyand are believed to be reliable. We cannot assumeresponsibility for the results obtained by others over whosemethods we have no control. It is the user's responsibility todetermine suitability for the user's purpose of any productionmethods mentioned herein and to adopt such precautions asmay be advisable for the protection of property and of personsagainst any hazards that may be involved in the handling anduse thereof. In light of the foregoing, Henkel Corporationspecifically disclaims all warranties expressed or implied,including warranties of merchantability or fitness for aparticular purpose, arising from sale or use of HenkelCorporations products. Henkel Corporation specificallydisclaims any liability for consequential or incidentaldamages of any kind, including lost profits. The discussionherein of various processes or compositions is not to beinterpreted as representation that they are free fromdomination of patents owned by others or as a license underany Henkel Corporation patents that may cover suchprocesses or compositions. We recommend that eachprospective user test his proposed application before repetitiveuse, using this data as a guide. This product may be coveredby one or more United States or foreign patents or patentapplications.

Trademark usageExcept as otherwise noted, all trademarks in this documentare trademarks of Henkel Corporation in the U.S. andelsewhere. denotes a trademark registered in the U.S.Patent and Trademark Office.

Reference 1.3

Henkel Americas+860.571.5100

Henkel Europe+49.89.320800.1800

Henkel Asia Pacific+86.21.2891.8863

For the most direct access to local sales and technical support visit: www.henkel.com/industrial