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| | EPX33 is a special food-grade two-component high-solid epoxy coating for lining potable water tanks.
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| | EPX33 is a high solid epoxy coating used for lining interior steel and concrete tanks, valves and pipes. Also used as protective coating in corrosive environments. Ideal for coating/lining water carrying pipes and equipment used in potable water immersion and for industrial storage and process tanks containing water and aqueous solutions. | | |
| • Economical tank lining coating for potable water (with CAT30).
• Low VOC contents.
• Excellent abrasion resistance.
• Excellent adhesion on concrete and metal surfaces.
• Applied in two coats, does not require any primer or topcoat when blasting is applied.
• Non toxic, chemically acceptable for contact with food and potable water.
• Easy and low-cost maintenance due to its smooth surface and high dust resistance.
• Excellent resistance to water, sea water, waste water, salt solutions.
• Excellent resistance to moisture and continuous variation of temperature in water immersion between 10°C and 60°C, and temporary resistance to a temperature of 85°C.
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| | • Method of Application : | Airless spray, brush, or roller. | | • Mixing Ratio : | (by volume)
3.6 to 0.9 (A to B). | | • Mixing : | The individual components of EPX33 should be thoroughly stirred before the two are mixed together. Combine components (A & B) in supplied proportions and mix thoroughly using a slow speed mixer for at least 3 minutes to achieve uniform consistency; “DO NOT USE HIGH SPEED MIXER”. Never mix more material than can be used within potlife. Material that has begun to set must be discarded. | | • Pot life : | At 20° C : 30 minutes (higher temperatures will shorten the pot-life sharply). | | • Cleaner : | S405 "also known as Epoxsol" | | • Thinner / Cleaner : | for most applications, no thinner is required. If thinning is necessary a minimal amount of S405 (also known as Epoxsol) can be used. | | • Note : | •When recoating, a special attention should be given toward drying times “minimum & maximum recoating time”. Any delay in applying interval coats may request sanding the surface of the previous coat to insure good adhesion.
•The reaction between the epoxy and its curing agent (A & B) can not be guaranteed unless a temperature of at least 10 °C is maintained for the mixture and the substrate until complete curing. Temperature of substrate should be at least 3°C above dew point to avoid moisture condensation during application.
•Coated surfaces by EPX33 should not be exposed to water, chemicals, or mechanical stresses before it is fully cured.
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| | • Component B : | CAT30 | | • Color : | Off-White | | • Gloss : | Semi-Gloss (ASTM-D1523) | | • Volume Solids : | 89.8 % (ASTM-D2697) | | • VOC : | 88 g/L (ASTM-D3960) | | • Flexibility : | Very good | | • Recommended film thickness : | 250 microns “dry” | | • Theoretical spreading rate : | 3.6 m²/L at 250 microns “dry” | | • Water resistance : | Excellent | | • Abrasian Resistance : | Very Good | | • Chemical Resistance : | Very Good | | • Number of Coats : | 2 | | • Specific Gravity (mixed) : | 1.69 kg/L (ASTM-D1475) | | • Packaging : | Component A “base” 3.6 L in a metal can
Component B “drier” 0.9 L in a metal can (CAT20) |
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| Surface Preparation
Proper surface preparation is essential to ensure coating success, performance, and longevity. In general, all surfaces must be clean, dry, undamaged, and free of contaminants prior to application.
STEEL
? Non-immersed surfaces: Abrasive blast to Sa2 in accordance with ISO 8501-1, achieving a surface profile of 50–100 µm.
?Immersed surfaces: Abrasive blast to Sa2½ (near-white metal finish) as per ISO 8501-1, with a surface profile of 50–100 µm.
Aged or previously coated steel: Abrasive blast to Sa3 according to ISO 8501-1, ensuring a surface profile of 50–100 µm.
Additional Instructions :
• Thoroughly remove all abrasive residues and dust from the prepared surface.
• Eliminate oil, grease, wax, and similar contaminants using S405 thinner (Epoxsol).
•Apply the coating system (EPX33) as soon as possible following surface preparation to prevent recontamination. Blasted steel must not be left exposed overnight.
•If immediate application of EPX33 is not feasible, a thin layer of EPX02 primer is strongly recommended as a temporary protective coating.
• Prior to the application of EPX33 over EPX02, ensure the primed surface is clean, completely dry, and free from oil, grease, or any other contaminants.
CONCRETE
?New concrete: Must be cured for at least 28 days at 21°C and 50% RH, or for an equivalent duration based on temperature and humidity.
EPX17 primer may be applied once the concrete has cured for at least 14 days at 21°C and 70% RH.
?Old concrete: Remove surface irregularities such as fins and protrusions by stoning, sanding, or grinding.
Abrasive blasting is the most effective method to remove previous coatings, form oils, laitance, and other foreign matter.
• Fill small holes and voids with STOP200 before applying EPX33.
• For highly porous concrete or poorly ventilated areas where solvent vapors are a concern, EPX17 is recommended as the primer.
If the surface has low absorption, EPX02 is a more suitable choice.
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| | • Dry to Touch : | 4 hours (ASTM-D1640). | | • Dry to Handle : | 8 hours “minimum recoat time”, 24 hours “maximum recoat time” (ASTM-D1640). | | • Fully Cured : | 7 days. | | • Note : | Drying times can be affected by many factors such as temperature, ventilation and coat thickness. Higher
temperatures will shorten the drying times. |
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| • Epoxy system, in general, especially component B, has to be kept in a cool and well ventilated place, protected from heat and direct sunlight. EPX33 is considered under flammable materials.
• Shelf life is one year from packing date in unopened original containers at 10 to 40°C. Containers should be kept tightly closed.
Safety:
• Well ventilated conditions should be provided during application.
• Do not breathe or inhale mist.
• Wear air-mask and avoid skin or eye contact.
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information in this data sheet and in all our data sheets are given to the best
of our knowledge based on laboratory testing and practical experience. Final results
depend on following instructions and on consumer skill. Our responsibility is limited
to providing products that Conform to samples and specimens provided by us. Due
to technical needs, we reserve the right to change any given specification without
notice.
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