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Loctite® 495 specifications

Loctite® 495
PRODUCT DESCRIPTION

LOCTITE® 495 provides the following product characteristics:

TechnologyCyanoacrylate
Chemical TypeEthyl cyanoacrylate
Appearance (uncured)Transparent, colorless to straw colored liquid
ComponentsOne part - requires no mixing
ViscosityLow
CureHumidity
ApplicationBonding
Key SubstratesPlastics, Rubbers and Metals

LOCTITE® 495 is a general purpose cyanoacrylate instant adhesive.

TYPICAL PROPERTIES OF UNCURED MATERIAL

Specific Gravity @ 25 °C1.05
Temperature: 25 °C, Shear Rate: 3,000 s-120 to 45
Spindle 1, speed 30 rpm20 to 60
Vapor Pressure, hPa<1
Flash PointSee MSDS

TYPICAL CURING PERFORMANCE

Under normal conditions, the atmospheric moisture initiates the curing process. Although full functional strength is developed in a relatively short time, curing continues for at least 24 hours before full chemical/solvent resistance is developed.

Cure Speed vs. Substrate

The rate of cure will depend on the substrate used. The table below shows the fixture time achieved on different materials at 22 °C / 50 % relative humidity. This is defined as the time to develop a shear strength of 0.1 N/mm2.

Fixture TimeISO 4587, seconds:
Mild Steel (degreased)10 to 30
Aluminum (degreased)5 to 15
Zinc Dichromate30 to 90
Neoprene<5
Rubber, Nitrile<5
ABS10 to 30
PVC3 to 10
Polycarbonate20 to 60
Phenolic5 to 20

Cure Speed vs. Bond Gap

The rate of cure will depend on the bondline gap. Thin bond lines result in high cure speeds, increasing the bond gap will decrease the rate of cure.

Cure Speed vs. Humidity

The rate of cure will depend on the ambient relative humidity. The following graph shows the tensile strength developed with time on Buna N rubber at different levels of humidity.

Cure Speed vs. Activator

Where cure speed is unacceptably long due to large gaps, applying activator to the surface will improve cure speed. However, this can reduce ultimate strength of the bond and therefore testing is recommended to confirm effect.

TYPICAL PROPERTIES OF CURED MATERIAL

After 24 hours @ 22 °C

Physical Properties:

Coefficient of Thermal Expansion, ASTM D 696, K-1100×10-6
Coefficient of Thermal Conductivity, ASTM C 177, W/(m·K)0.10
Softening Point, °C165

Electrical Properties:

Dielectric Constant / Dissipation Factor, ASTM D 150:

0.10 kHz2 to 3.30 / <0.02
1 kHz2 to 3.50 / <0.02
10 kHz2 to 3.50 / <0.02
Volume Resistivity, ASTM D 257, O·cm2×1015 to 10×1015
Surface Resistivity, ASTM D 257, O10×1015 to 80×1015
Dielectric Breakdown Strength, ASTM D 149, kV/mm25

TYPICAL PERFORMANCE OF CURED MATERIAL

Adhesive Properties

After 24 hours @ 22 °C

Lap Shear Strength, ISO 4587:

Steel (grit blasted)N/mm212 to 26
psi1,740 to 3,770
Aluminum (grit blasted)N/mm212 to 19
psi1,740 to 2,755
Zinc DichromateN/mm26 to 13
psi870 to 1,885
ABSN/mm26 to 20
psi870 to 2,900
PVC- N/mm26 to 20
psi870 to 2,900
PolycarbonateN/mm25 to 20
psi725 to 2,900
PhenolicN/mm25 to 15
psi725 to 2,175
NeopreneN/mm25 to 15
psi725 to 2,175
NitrileN/mm25 to 15
psi725 to 2,175

Tensile Strength, ISO 6922:

SteelN/mm212 to 25
psi1,740 to 3,625
Buna-NN/mm25 to 15
psi725 to 2,175

"T" Peel Strength, ISO 11339:

Steel (degreased)N/mm2<0.50
lb/in<2.80

After 10 seconds @ 22 °C

Tensile Strength, ISO 6922:

Buna-NN/mm2=6.00
-psi=870

TYPICAL ENVIRONMENTAL RESISTANCE

After 1 week @ 22°C

Lap Shear Strength, ISO 4587:

Mild steel (grit blasted)

Chemical/Solvent Resistance

Aged under conditions indicated and tested @ 22 °C.

% of initial strength

Environment°C100 hr500 hr1000 hr
Motor Oil4010010095
Gasoline22100100100
Isopropanol22100100100
Ethanol22100100100
Freon TA22100100100
1,1,1 Trichloroethane22100100100
Heat/Humidity 95% RH40807565
Heat/Humidity 95% RH
on Polycarbonate
40100100100

GENERAL INFORMATION

This product is not recommended for use in pure oxygen and/or oxygen rich systems and should not be selected as a sealant for chlorine or other strong oxidizing materials. For safe handling information on this product, consult the Material Safety Data Sheet (MSDS).

Directions for use

  1. For best performance bond surfaces should be clean and free from grease.
  2. This product performs best in thin bond gaps (0.05 mm).
  3. Excess adhesive can be dissolved with Loctite cleanup solvents, nitromethane or acetone.

Loctite Material Specification

LMS dated December 03, 2002. Test reports for each batch are available for the indicated properties. LMS test reports include selected QC test parameters considered appropriate to

specifications for customer use. Additionally, comprehensive controls are in place to assure product quality and consistency. Special customer specification requirements may be coordinated through Henkel Loctite Quality.

Storage

Store product in the unopened container in a dry location. Storage information may be indicated on the product container labeling.

Optimal Storage: 2 °C to 8 °C. Storage below 2 °C or greater than 8 °C can adversely affect product properties. Material removed from containers may be contaminated during use. Do not return product to the original container. Henkel Corporation cannot assume responsibility for product which has been contaminated or stored under conditions other than those previously indicated. If additional information is required, please contact your local Technical Service Center or Customer Service Representative.

Conversions

(°C x 1.8) + 32 = °F

kV/mm x 25.4 = V/mil

mm / 25.4 = inches

N x 0.225 = lb

N/mm x 5.71 = lb/in

N/mm2 x 145 = psi

MPa x 145 = psi

N·m x 8.851 = lb.in

N·mm x 0.142 = oz.in

mPa·s = cP

Note: The data contained herein are furnished for information only and are believed to be reliable. We cannot assume responsibility for the results obtained by others over whose methods we have no control. It is the user's responsibility to determine suitability for the user's purpose of any production methods mentioned herein and to adopt such precautions as may be advisable for the protection of property and of persons against any hazards that may be involved in the handling and use thereof. In light of the foregoing, Henkel Corporation specifically disclaims all warranties expressed or implied, including warranties of merchantability or fitness for a

particular purpose, arising from sale or use of Henkel Corporation’s products. Henkel Corporation specifically disclaims any liability for consequential or incidental damages of any kind, including lost profits. The discussion herein of various processes or compositions is not to be interpreted as representation that they are free from domination of patents owned by others or as a license under any Henkel Corporation patents that may cover such processes or compositions. We recommend that each prospective user test his proposed application before repetitive use, using this data as a guide. This product may be covered by one or more United States or foreign patents or patent applications.

Trademark usage

LOCTITE is a trademark of Henkel Corporation

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

Title: Loctite® 495 specifications
Description: Properties, Cure Speed, Performance, Resistance, Directions, and Storage
Published: 6/10/2008
Last Edited: 1/5/2023
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