Strong strength, Clear gel, Henkel Loctite 454 Instant Adhesive, Industrial sealant

PRODUCT DESCRIPTION

LOCTITE® 454 Instant Adhesive provides the following product characteristics:

LOCTITE® 454 is designed for the assembly of difficult-to-bond materials which require uniform stress distribution and strong tension and/or shear strength. The product provides rapid bonding of a wide range of materials, including metals, plastics and elastomers. LOCTITE® 454 is particularly suited for bonding porous or absorbent materials such as wood, paper, leather and fabric. The gel consistency prevents adhesive flow
even on vertical surfaces.

TYPICAL PROPERTIES OF UNCURED MATERIAL

Specific Gravity @ 25 °C 1.10
Casson Viscosity, 25 °C, mPa·s (cP):
Cone and plate rheometer 100 to 450LMS
Viscosity, Brookfield - RVT, 25 °C, mPa·s (cP):
Spindle TC, speed 20 rpm, Helipath 18,000 to 40,000

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:
Steel (degreased) 5 to 20
Aluminum 2 to 10
Zinc Dichromate 10 to 20
Neoprene <5
Rubber, Nitrile <5
ABS 2 to 10
PVC 2 to 10
Polycarbonate 10 to 40
Phenolic 2 to 10

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.

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.

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