-
Composition and Properties
-
GEMREZ CR 1:1 is a two
part , solvent free, chemical resistant epoxy resin.
-
It is formulated for use
as a chemical resistant lining , and as a primer under GEMCOAT CR 1:1
chemical & abrasion resistant coating, and GEMCOAT CRT chemical &
abrasion resistant topping.
-
It can be reinforced with
binder free fibreglass.
-
It can be used for lining
for concrete, steel, and fibreglass tanks, pumps, and secondary
containment (bunds) exposed to chemical immersion and splash & spillage.
-
It is formulated to have
resistance to most concentrated acids & alkalais, and other commonly
used chemicals such as solvents etc. – consult with GemCo for suitabilty
for use.
-
Two coats of GEMCOAT CR in
are recommended over the top of GEMREZ CR 1:1 chemical resistant epoxy
resin when reinforced with fiberglass, or when lining a pump subject to
abrasion.
-
Physical properties
-
Appearance: Base – clear
resin Hardener – clear resin
-
Odour: low odour
-
Solids: 100 %
-
Coating Type: Epoxy
-
Packaging: 2, 8 litre ,
two part pack
-
Mix ratio: 1 part base :1
part hardener
-
Pot Life: 1/2 hour
approximately at 20 degrees Celsius (100g mix)
-
Coverage: 5 sq
metres/litre @ 200 microns DFT(theoretical - depends on substrate)
-
Dry hard Overnight to tack
free; 7 days full cure before putting in service
-
Surface Preparation
-
All oil, grease , and
other contaminants must be removed (GEMPREP 2000 is recommended).
-
Concrete: Must be minimum
of 4 weeks old. Acid etch with 5% Hydrochloric acid, wash clean with
water and allow to dry OR physically remove laitence by suitable means
e.g. grinding, sweep blasting etc. On previously painted concrete
physically remove coating by suitable means e.g. grinding, sweep
blasting etc.
-
Steel : Blast with a
suitable abrasive to near white metal (SSPC 10/SA 2.5 standard). If this
is not possible remove loose material by mechanical cleaning or high
pressure water blast until only tight rust is left.
-
Fibreglass: Abrade surface
to give a good key.
-
All surfaces must be free
of dust or other contaminants before applying GEMREZ CR 1:1
-
Method of Application
-
Add 1 part hardner to 1
part base and thoroughly mix - a drill with a mixing blade is required.
-
In cold weather warming
base & hardener in hot water will make mixing easier.
-
GEMREZ CR 1:1 is applied
by brush , or roller in one coat - rolling is preferred method of
application. Recoat with GEMREZ CR1:1, GEMCOAT CR 1:1, or GEMCOAT CRT
within 24 hours.
-
Allow system to cure 24
hours .If possible cure for a further 16 hours @ 50° C .
-
Allow 2 days minimum
before putting into service – 7days is preferred.
-
Handling Precautions
-
Avoid contact with eyes
and skin.
-
Do not ingest.
-
Use with adequate
ventilation.
-
Protective clothing ,eye
protection, and gloves should be worn.
-
Do not breathe vapor or
spray.
-
Keep away from children.
1/3/98
The information provided is accurate to the
best of our knowledge. We can not however anticipate all conditions under
which this information and our products may be used. We therefore accept
no responsibility for results obtained by the application of our products,
or for their safe use and suitability. GemCo Limited sells these products
without warranty and buyers and users assume all responsibility and
liability for loss or damage arising from the handling and use of our
products.
|
