A fast drying, two component, weldable modified zinc ethyl silicate pre-fabrication
primer for application by manual or automatic spray.
As a temporary protective primer for the coating of steelwork prior to the fabrication
Suitable for overcoating with a wide range of high performance coating systems for use
in a variety of environments, including offshore structures, marine environments,
chemical and petrochemical plants, power stations and bridges.
Gloss Level Matt
Volume Solids 28%
Typical Thickness 15 microns (0.5 mils) dry equivalent to 54 microns
(2.1 mils) wet
Theoretical Coverage 18.67 m2/litre at 15 microns d.f.t and stated volume solids 898
sq.ft/US gallon at 0.5 mils d.f.t and stated volume solids
Practical Coverage Allow appropriate loss factors
Method of Application Airless spray, Air spray, Brush, Roller
Overcoating Interval with
Temperature Touch Dry Hard Dry Minimum Maximum
10°C (50°F) 2-3 minutes 3-4 minutes 24 hours Extended*
15°C (59°F) 2-3 minutes 3-4 minutes 24 hours Extended*
25°C (77°F) 2-3 minutes 2-3 minutes 24 hours Extended*
40°C (104°F) 2-3 minutes 2-3 minutes 24 hours Extended*
* See International Protective Coatings Definitions & Abbreviations
Flash Point Base (Part A) C/A (Part B) Mixed
-7°C (19°F) -13°C (9°F) -13°C (9°F)
Product Weight 1.6 kg/l (13.4 lb/gal)
VOC 635 g/l (5.29 lb/gal)
All surfaces to be coated should be clean, dry and free from contamination. Prior to
paint application all surfaces should be assessed and treated in accordance with
Where necessary, remove weld spatter, and where required smooth weld seams and sharp
Oil or grease should be removed in accordance with SSPC-SP1 solvent cleaning.
Abrasive Blast Cleaning
Abrasive blast clean to Sa2 (ISO 8501-1:1988) or SSPC-SP6. If oxidation has occurred
between blasting and application of Interplate 11, the surface should be reblasted to the
specified visual standard.
Surface defects revealed by the blast cleaning process, should be ground, filled, or
treated in the appropriate manner.
The blast profile achieved should have an angular configuration. Blasting media should
be steel grit of a nominal size of 0-6-1.0 mm (24-40 thou) or a mixture with steel shot of a
nominal size of 0.6-1.4 mm (24-56 thou).
This product is NOT recommended over hand prepared steel.
Mixing Interplate 11 is supplied in 2 parts, a liquid Binder base
component (Part A ) and a Paste component (Part B). The
Binder (Part A) should be slowly added to the Paste (Part B) whilst
stirring with a mechanical agitator. DO NOT ADD PASTE TO
LIQUID. Material should be sieved prior to application and
should be constantly agitated in the pot during spraying. Once the
unit has been mixed it should be used within the working pot life.
This is a low viscosity material and agitation is required during
application to ensure homogenity is maintained.
Mix Ratio 1 part : 1 part by volume
Working Pot 10°C (50°F) 15°C (59°F) 25°C (77°F) 40°C (104°F)
Life 8 hours 8 hours 8 hours 4 hours
Airless Spray Recommended - Automatic plant preferred - Tip range:
0.53-0.64 mm (21-25 thou)
Manual application - Tip Range:
0.43-0.53 mm (17-21 thou).
- Total output fluid pressure at spray tip not
less than 70 kg/cm2 (1,000 p.s.i.)
Air Spray Recommended Gun DeVilbiss MBC or JGA
(Pressure Pot) Air Cap 704 or 765
Fluid Tip E
Air Spray Recommended Use suitable proprietary equipment
Brush Suitable - Touch up and small areas only
Roller Suitable - Touch up and small areas only
Thinner International GTA803 Do not thin more than allowed by local
Cleaner International GTA803
Work Stoppages Do not allow material to remain in hoses, gun or spray equipment.
Thoroughly flush all equipment with International GTA803. Once
units of paint have been mixed they should not be resealed and it
is advised that after prolonged stoppages work recommences with
freshly mixed units.
Clean Up Clean all equipment immediately after use with International
GTA803. It is good working practice to periodically flush out spray
equipment during the course of the working day. Frequency of
cleaning will depend upon amount sprayed, temperature, relative
humidity and elapsed time, including any delays.
All surplus materials and empty containers should be disposed of
in accordance with appropriate regional regulations/legislation.
Satisfactory welding properties will only be obtained by strict control of application to
the recommended film thickness. Over-application of Interplate 11 will result in
increased levels of weld fume on cutting and welding, and will also increase the porosity
of the welds.
Interplate 11 is designed for application by automatic plant, if small areas are to be hand
sprayed, take care to avoid dry spray and over-application.
Note, this product dries too quickly to enable accurate wet film thickness measurements.
Failure to obtain an even film and coverage of blast profile will result in rapid rash
rusting on exposure to weathering.
The drying times quoted are for the recommended dry film thicknesses at the stated
temperatures when using automated process. Failure to adhere to these parameters can
result in damage to equipment, rollers and disruption of the coated surface due to
handling damage on stacking. Best results are obtained by using steel preheated to a
temperature of 40°C (104°F).
Thicker films of Interplate 11 will provide longer periods of corrosion resistance, but will
compromise welding, cutting and handling properties. In most environments to obtain 6-
9 months protection 25 microns (1 mil) is a recommended dry film thickness.
Satisfactory curing for overcoating within 24 hours will not be achieved at relative
humidities less than 50%. At relative humidities below 50%, curing will be severely
retarded and humidity may need to be increased by steam or water spraying.
Interplate 11 is compatible with both sacrificial and impressed current cathodic
Prior to overcoating, Interplate 11 must be clean, dry and free from both soluble salts
and excessive zinc corrosion products.
For further information on application, handling and weathering properties, consult
International Protective Coatings
This product has the following specification approvals:
Lloyds Register of shipping - Welding Approval of Prefabrication Primer
Det Norske Veritas - Welding Approval on Blast Cleaned Steel
Newcastle Occupational Health Agency (NOHA) - Tested for hazardous effects of
welding fume and flame cutting.
Interplate 11 can be overcoated with a number of high performance systems suitable for
steel protection in a wide range of atmospheric exposure and immersed conditions.
The following products can be applied directly to Interplate 11:
Intercryl 525 Intergard 405
Intercure 200 Intergard 410
Intercure 202 Intergard 475HS
Intercure 420 InterH20 401
Intercure 422 Interseal 670HS
Intergard 251 Interzone 505
Intergard 269 Interzone 954
Intergard 270 Interzone 1000
For other suitable topcoats, consult International Protective Coatings.
data sheet can be found in the following sections of the International Protective Coatings
• Definitions & Abbreviations
• Surface Preparation
• Paint Application
• Theoretical & Practical Coverage
Individual copies of these information sections are available upon request.
This product is intended for use only by professional applicators in industrial situations
in accordance with the advice given on this sheet, the Material Safety Data Sheet and the
container(s), and should not be used without reference to the Material Safety Data Sheet
(MSDS) which International Protective Coatings has provided to its customers.
All work involving the application and use of this product should be performed in
compliance with all relevant national, Health, Safety & Environmental standards and
In the event welding or flame cutting is performed on metal coated with this product,
dust and fumes will be emitted which will require the use of appropriate personal
protective equipment and adequate local exhaust ventilation.
If in doubt regarding the suitability of use of this product, consult International
Protective Coatings for further advice.
20 litre unit Interplate 11 Base 10 litres in a 20 litre container
Interplate 11 Curing Agent 10 litres in a 20 litre container
For availability of other pack sizes contact International Protective Coatings
U.N. Shipping No. 1263
20 litre unit 25.0 kg (55.1 lb) Base (Part A) 10.1 kg (22.3 lb) Curing Agent (Part B)
Shelf Life 6 months minimum at 25°C (77°F). Subject to re-inspection
thereafter. Store in dry, shaded conditions away from sources
of heat and ignition.