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Instructions for use
Before proceeding, please read the following information application carefully to ensure that proper procedures are fully understood.
Metal Grade Hi-Temp repair compound is a ceramic and stainless-
filled one-part water based paste. It is formulated using the most advanced
inorganic resin technology and is temperature resistant up to 1093 °C
000 °F. Hi-Temp is used to seal joints, defects, cracks and voids in
cast iron, steel and stainless steel. NB. Hi-Temp should not be used on
aluminium or aluminium alloys.
1. Surface preparation
Heavy contamination due to oil or grease should be removed using
a cleaner. Abrasive blasting is the preferred surface preparation.
A Remove all contamination oil, grease and dirt with a cleaner.
B Remove all loose rust and surface coatings.
C Roughen the surface, preferably with abrasive blasting. Alternatively,
a die grinder, needle scalar or angle grinder may be used. If grinding, make
sure the surface is roughened, not polished. Where grinding or needle
gunning is used, the surface should be cross-scored to improve adhesion.
D To ensure that all contamination is removed, carry out a final degreasing
vith a cleaner. Cloths should be frequently changed to avoid spreading
of contamination. On deeply pitted surfaces of porous castings, the
cleaner should be worked into the surface with a brush and washed off
using excess cleaner. If embedded oils are present in porous castings,
they should be burned out at high temperature.
E Parts for example, threads or bearing surfaces which must remain
in position during application but which should not adhere to Hi-Temp
must be coated with a release agent.
2. Mixing Hi-Temp is a ready to use, single part
paste. Prior to opening the pouch make sure the contents are mixed
throughly by kneading the pouch. Using a knife or a pair of scissors
cut off a corner of the pouch and squeeze out the required amount of
product onto a clean working surface. Fold and clip pouch in order to save
residual paste.
3. Application
Prepared surfaces should be dry. Use a spatula or putty knife and press
the material onto the prepared area, working the material into any cracks
and surface defects. Hi-Temp can be used for applications ut to 9 mm 38
thick. Let the product air dry for five to seven hours at room temperature.
Repairs pin holes, cracks and warped sur- faces on high temperature, low pressure
systems including incinerators, manifolds, stacks, heat exchangers and turbines.
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When used on heavy sections and where build-up will exceed 9 mm 38
use the following technique: Fill section up to 9 mm 38 in one
step. Let the product fully cure 16–4 hours before adding another 9 mm
38 in a second step. Let the product cure again. Continue this procedure
until the groove is filled. The reason for 9 mm 38 maximum thickness
per layer for the Hi-Temp product is that it is a single component system
in an aqueous solution. The water must have the possibility to dry out.
The water in sections above 9 mm 38 would not dry out, and upon
exposure to high temperatures would effervesce and bubble. It is
also recommended that the paste be heat cured at 90 °C 00 °F between
applications.
For repairing holes, repairs should be made using a metal screen. First
apply Hi-Temp, then form and place the screen inside the hole and then
apply secondt coating of Hi-Temp to cover the screen.
4. Machining
