Loctite ® 495
PRODUCT DESCRIPTION
LOCTITE® 495 provides the following product characteristics:
Technology Cyanoacrylate
Chemical Type Ethyl cyanoacrylate
Appearance (uncured) Transparent, colorless to straw colored liquid
Components One part - requires no mixing
Viscosity Low
Cure Humidity
Application Bonding
Key Substrates Plastics, Rubbers and Metals
LOCTITE® 495 is a general purpose cyanoacrylate instant adhesive.
TYPICAL PROPERTIES OF UNCURED MATERIAL
Specific Gravity @ 25 °C 1.05
Temperature: 25 °C, Shear Rate: 3,000 s-1 20 to 45
Spindle 1, speed 30 rpm 20 to 60
Vapor Pressure, hPa <1
Flash Point See 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 Time, ISO 4587, seconds:
Mild Steel (degreased) 10 to 30
Aluminum (degreased) 5 to 15
Zinc Dichromate 30 to 90
Neoprene <5
Rubber, Nitrile <5
ABS 10 to 30
PVC 3 to 10
Polycarbonate 20 to 60
Phenolic 5 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-1 100×10-6
Coefficient of Thermal Conductivity, ASTM C 177, W/(m·K) 0.10
Softening Point, °C 165
Electrical Properties:
Dielectric Constant / Dissipation Factor, ASTM D 150:
0.10-kHz 2 to 3.30 / <0.02
1-kHz 2 to 3.50 / <0.02
10-kHz 2 to 3.50 / <0.02
Volume Resistivity, ASTM D 257, O·cm 2×1015 to 10×1015
Surface Resistivity, ASTM D 257, O 10×1015 to 80×1015
Dielectric Breakdown Strength, ASTM D 149, kV/mm 25
TYPICAL PERFORMANCE OF CURED MATERIAL
Adhesive Properties
After 24 hours @ 22 °C
Lap Shear Strength, ISO 4587:
Steel (grit blasted) N/mm² 12 to 26
(psi) (1,740 to 3,770)
Aluminum (grit blasted) N/mm² 12 to 19
(psi) (1,740 to 2,755)
Zinc Dichromate N/mm² 6 to 13
(psi) (870 to 1,885)
ABS N/mm² 6 to 20
(psi) (870 to 2,900)
PVC N/mm² 6 to 20
(psi) (870 to 2,900)
Polycarbonate N/mm² 5 to 20
(psi) (725 to 2,900)
Phenolic N/mm² 5 to 15
(psi) (725 to 2,175)
Neoprene N/mm² 5 to 15
(psi) (725 to 2,175)
Nitrile N/mm² 5 to 15
(psi) (725 to 2,175)
Tensile Strength, ISO 6922:
Steel N/mm² 12 to 25
(psi) (1,740 to 3,625)
Buna-N N/mm² 5 to 15
(psi) (725 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-N N/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 °C 100 hr 500 hr 1000 hr
Motor Oil 40 100 100 95
Gasoline 22 100 100 100
Isopropanol 22 100 100 100
Ethanol 22 100 100 100
Freon TA 22 100 100 100
1,1,1 Trichloroethane 22 100 100 100
Heat/Humidity 95% RH 40 80 75 65
Heat/Humidity 95% RH
on Polycarbonate 40 100 100 100
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