ST574 Epoxy Putty Technical Data Sheet

Electrical Cable Gland Epoxy Putty (ST574)
Description
Hylomar Cable Gland Epoxy Putty is a high quality structural adhesive filler based on epoxide resins.
The products were originally developed for use on high speed military aircraft and have since been
used successfully for many varied applications throughout industry.
When cured, Hylomar Epoxy Putty can be drilled, filed, sawn, ground and generally shaped and
treated like metal. It can be used to bond iron, steel, brass, bronze, aluminium, concrete, brick,
porcelain and glass to themselves and to one another, and is ideal for modelling and for making
prototype moulds, jigs, tools, dies, and formers. In addition, Hylomar Epoxy Putty can be used for
repairing and even re-building broken machinery; filling large or small holes in castings; repairing
cracks in cast machinery parts; mending worn bearings and stripped threads; building up worn faces
on machine tools and repairing damaged concrete. This resistance to chemicals allows it's use to
repair cracks and holes in pipes and ducting, in valves, hydraulic systems, water tanks, bulk storage
tanks and steam pressure lines.
Properties
Specific Gravity 2.0
Specific Volume 0.5 litres/kg 13.9 cubic in/1b
Hardness 85-90° Shore D
Tensile Strength 25.0 MN/m2 approximate figures 3,625 1bf/ in2
Compressive Strength 70 MN/m2 10,150 1bf/in2
Adhesion to Aluminium 4.6 MN/m2 670 1bf/in2
Adhesion to Mild Steel 4.6 MN/m2 670 1bf/in2
Mixing & Application
Hylomar Cable Gland Epoxy Putty is supplied as a two-part system, requiring only that the hardener
and resin components (Parts A and B respectively) are mixed before use.
The product is designed to give the best general properties by mixing the two components together
in equal parts by volume. It is strongly recommended that this ratio be adhered to. However, the
ratio can be varied if necessary to emphasise some properties, but at the expense of others. For
example, a 50% excess of the hardener component will give added flexibility/resilience, and a similar
excess of the resin component will generally give improved hardness at high temperatures.
Hylomar Epoxy Putty is mixed by blending the two parts by hand. It is convenient first to 'wrap' the
more sticky hardener in the resin component before starting the kneading and rolling process. In all
cases it is essential that mixing be carried out until all traces of the separate components have
disappeared. Any inadequacy in the mixing process will leave layers and areas of weakness in the
cured materials.
Information given in this publication is based upon technical data gained in our own and other Laboratories and is believed to be true. However the material is used in
conditions beyond our control thus we can assume no liability for results obtained or damages incurred through the application of the data present herein.
Hylomar Ltd, Cale Lane, Wigan WN2 1JT UK
Tel: +44 (0) 1942 617000
Fax: +44 (0) 1942 617001
Revision date
Product name
22.03.04
Page 1
Hylomar Epoxy Putty – electrical grade
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The parts to which the materials are to be applied should be clean and dry, and preferably have a
freshly-abraded surface.
When applying the Putty it may be an advantage to warm the surface beforehand to a little above the
normal room temperature; this will improve the 'wetting' of the surface by the Putty and give it
enhanced adhesion. With good and thorough surface preparation Hylomar Epoxy Putty materials
will adhere to most hard surfaces and to many plastics materials. Exceptions are polyethylene,
PTFE and plasticized PVC.
The surface of the uncured compound may be smoothed off immediately after application using
water as a lubricant. This procedure is not recommended, however, if it is intended to cure the
assembly at a high temperature, since surface blistering may result.
Working Properties
The cured material can be sawn, drilled, tapped and generally machined like metal. It will not
become brittle and will not clog files and abrasives. Any normal kind of paint can be applied and the
products are not damaged by the usual paint stoving cycles.
Chemical Resistance
Resistant to many chemicals, solvents, oils and water when cured. Slow but progressive attack by
strong alkalis and mineral acids ultimately affects adhesion. Softened slightly by some chlorinated
solvents, which can help with the removal of cured material.
Heat Resistance
May be used at temperatures of -60°C to +120°C for extended periods in light or non-load bearing
applications, but test joints show a 50% reduction of adhesive strength at 150°C. However, when
used as a filler with mechanical support may be used at temperatures up to 250°C. As a
thermoset material, it will not distort at high temperatures when not under stress.
Heat Distortion Temperature
Mixed in ratio: 1 Volume Part A to 1 Volume Part B - 68 deg.C.
Electrical Properties
Suitable for use as an insulating sealant/adhesive on electrical applications.
Notes on Property Tables
1)
CURE - The test results recorded were obtained on specimens cured at temperatures of 100-
200°C, but substantially similar results may be obtained after cure at 20-25°C for 24 hours.
2)
TEST METHODS
Heat Distortion Temperature
Hardness
Tensile Strength
Compressive Strength
Temperature of Deflection Under Load)
B.S.2782:121A:1976
Shore D-B.S.2782:365B:1981
BS.2782 METHOD 301E
BS.2782 METHOD 102G