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Technical Data She

LOCTITE

577May-200

PRODUCT DESCRIPTION

LOCTITE

577 provides the following product characteristics:

Technology Acrylic

Chemical Type Dimethacrylate Ester

Appearance (uncured) Yellow PasteLMS

Fluorescence Positive under UV lightLMS

Components One component - requires no mixing

Viscosity High, thixotropic

Cure Anaerobic

Secondary Cure Activator

Application Thread Sealing

Strength Medium

LOCTITE

577 is designed for the locking and sealing of metal

threaded pipes and fittings. Particularly suitable for use on

stainless steel without the need for surface activation. The

product cures when confined in the absence of air between

close fitting metal surfaces and prevents loosening and

leakage from shock and vibration. The thixotropic nature of

LOCTITE

577 reduces the migration of liquid product after

application to the substrate.

TYPICAL PROPERTIES OF UNCURED MATERIALSpecific Gravity @ 25 C 1.09

Flash Point - See MSDS

Viscosity, Brookfield - RVT, 25 C, mPas (cP):

Spindle 6, speed 2.50 rpm 70,000 to 130,000LMS

Spindle 6, speed 20 rpm 16,000 to 33,000LMS

TYPICAL CURING PERFORMANCECure 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.

%

ofF

ullStr

eng

thon

Ste

el

Cure Time

100

75

50

25

01min 5min10min 30min1h 3h 6h 24h 72h

Ste

el

Brass

Zinc Dichromate

Stain

less

Stee

l

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.

%

ofF

ullStr

eng

thon

Ste

el

Cure Time

100

75

50

25

01min 5min10min 30min1h 3h 6h 24h 72

0.05mm

0.15mm

0.25mm

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

%

ofF

ullStr

eng

thon

Ste

el

Cure Time

100

75

50

25


40C

22C

5C

Cure Speed vs. ActivatorWhere cure speed is unacceptably long, or large gaps apresent, applying activator to the surface will improve cuspeed. The graph below shows breakaway strength developwith time using Activator 7471 and 7649 on M10 zidichromate steel nuts and bolts and tested according to IS10964.

%

ofF

ullStr

eng

tho

nSte

el

Cure Time

100

75

50

25


Activ

ator

7471

Activator 7649

No Activator

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TDS LOCTITE

577, May-20

TYPICAL PROPERTIES OF CURED MATERIALPhysical Properties:

Coefficient of Thermal Expansion, ASTM D 696, K-1 8010-6

Coefficient of Thermal Conductivity, ASTM C 177,W/(mK)

0.10

Specific Heat, kJ/(kgK) 0.30

TYPICAL PERFORMANCE OF CURED MATERIAL

Adhesive Properties

After 24 hours @ 22 CBreakaway Torque, ISO 10964:

M10 steel nuts and bolts Nm 11 (lb.in.) (100)

Prevail Torque, ISO 10964:

M10 steel nuts and bolts Nm 6 ( lb.in.) (50)

Breakloose Torque, ISO 10964, Pre-torqued to 5 Nm:


Max. Prevail Torque, ISO 10964, Pre-torqued to 5 Nm:


Compressive Shear Strength, ISO 10123:

Steel pins and collars N/mm 5LMS

(psi) (725)

TYPICAL ENVIRONMENTAL RESISTANCE

Cured for 1 week @ 22 CBreakloose Torque, ISO 10964, Pre-torqued to 5 Nm:

M10 zinc phosphate steel nuts and bolts

Hot Strength

Tested at temperature

%

RTStr

eng

th

Temperature, C

100

75

50

25

00 50 100 150

Heat AgingAged at temperature indicated and tested at 22C

%

Initia

lStr

eng

tha

tRT

Hours

125

100

75

50

25

00 1000 2000 3000 4000 500

120C

150C

Chemical/Solvent ResistanceAged under conditions indicated and tested at 22C.

% of initial strength

Environment C 100 hr 500 hr 1000 hr

Motor Oil 125 100 100 100

Unleaded Petrol 22 100 100 100

Brake fluid 22 100 100 95Ethanol 22 100 100 95

Acetone 22 90 80 65

Water Glycol 50/50 87 100 90 90

GENERAL INFORMATION

This product is not recommended for use in pure oxygeand/or oxygen rich systems and should not be selected aa sealant for chlorine or other strong oxidizing materials.

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

Where aqueous washing systems are used to clean tsurfaces before bonding, it is important to check fcompatibility of the washing solution with the adhesive.some cases these aqueous washes can affect the cure aperformance of the adhesive.

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

Directions for use

For Assembly

1. For best results, clean all surfaces (external and internwith a Loctite cleaning solvent and allow to dry.

2. If the material is an inactive metal or the cure speed is

slow, spray with Activator 7471 or 7649 and allow to dry3. Apply a 360 bead of product to the leading threads of t

male fitting, leaving the first thread free. Force tmaterial into the threads to thouroughly fill the voids. Fbigger threads and voids, adjust product amouaccordingly and apply a 360 bead of product on tfemale threads also.

4. Using accepted trade practices, assemble and wrentighten fittings until proper alignment is obtained.

5. Properly tightened fittings will seal instantly to moderapressures. For maximum pressure resistance and solve

Henkel Loctite Americas+860.571.5100

Henkel Loctite Europe+49.89.9268.0

Henkel Loctite Asia Paci+81.45.758.18

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

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TDS LOCTITE

577, May-20

resistance allow the product to cure a minimum of 24hours.

For Disassembly

1. Remove with standard hand tools.

2. Where hand tools do not work because of excessiveengagement length or large diameters (over 1"), applylocalized heat to approximately 250C. Disassemblewhile hot.

For Cleanup

1. Cured product can be removed with a combination of soaking in a Loctite solvent and mechanical abrasionsuch as a wire brush.

Loctite Material SpecificationLMS

LMS dated June-18, 2001. Test reports for each batch areavailable for the indicated properties. LMS test reports includeselected QC test parameters considered appropriate tospecifications for customer use. Additionally, comprehensivecontrols are in place to assure product quality andconsistency. Special customer specification requirements may

be coordinated through Henkel Loctite 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 properties.Material 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 or Customer Service Representative.

Conversions(C x 1.8) + 32 = FkV/mm x 25.4 = V/milmm / 25.4 = inchesN x 0.225 = lbN/mm x 5.71 = lb/inN/mm x 145 = psiMPa x 145 = psiNm x 8.851 = lbinNmm x 0.142 = ozinmPas = cP

NoteThe data contained herein are furnished for information onand are believed to be reliable. We cannot assumresponsibility for the results obtained by others over whomethods we have no control. It is the user's responsibilitydetermine suitability for the user's purpose of any productimethods mentioned herein and to adopt such precautionsmay be advisable for the protection of property and of persoagainst any hazards that may be involved in the handling ause thereof. In light of the foregoing, Henkel Corporatio

specifically disclaims all warranties expressed or implieincluding warranties of merchantability or fitness forparticular purpose, arising from sale or use of HenkCorporations products. Henkel Corporation specificadisclaims any liability for consequential or incidentdamages of any kind, including lost profits. The discussiherein of various processes or compositions is not tointerpreted as representation that they are free frodomination of patents owned by others or as a license undany Henkel Corporation patents that may cover suprocesses or compositions. We recommend that eaprospective user test his proposed application before repetitiuse, using this data as a guide. This product may be coverby one or more United States or foreign patents or pateapplications.

Trademark usageLOCTITE is a trademark of Henkel Corporation

Reference 1

Henkel Loctite Americas+860.571.5100

Henkel Loctite Europe+49.89.9268.0

Henkel Loctite Asia Paci+81.45.758.18

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

577-en

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