Inertol® Poxitar®
Inertol® Poxitar® is a two part reaction hardening, chemical resistant coating of low solvent content based on coal tar epoxy resin, in combination with mineral fillers.
- Tough hard, heavy duty
- Abrasion and impact resistant
- Excellent resistance to water and chemicals
- Resistant to microbes
Usage
Inertol® Poxitar® is used as a protective chemical resistant coating for concrete and steel, as internal and external coating for buried and submerged structures in wastewater, seawater or highly aggressive soils such as:- Sewage, effluent or waste treatment plants
- Immersed piers
- Steel and concrete silos
- Ship hulls, pipelines, cooling towers
- Oil catchment tanks, pipes and piles of off-shore platforms
- Structures immersed in fresh and salt water
- Chemical storages
- Steel protection, exterior of buried metal pipes
- Marine structures
Advantages
- Tough hard, heavy duty
- Abrasion and impact resistant
- Excellent resistance to water and chemicals
- Resistant to microbes
Packaging
| Part A+B pre-batched | 5.0 kg |
| Part A | 0.8 kg container |
| Part B | 4.2 kg container |
Colour
| Part A+B | Black liquid |
| Part A | Light yellow liquid |
| Part B | Black liquid |
Product Details
Chemical base
Epoxy resin modified with coal tar
Shelf life
12 months from date of production
Storage conditions
The product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +35 °C.
Density
| ~1.65 kg/L (+27 °C) | (EN ISO 2811-1) |
Flash point
+33 °C
Solid content by weight
~77 %
System structure
Concrete:
| Layer | Product |
| Primer | 1 × Inertol® Poxitar® + 5 % Sika® Thinner DS |
| Seal coat | 1–2 × Inertol® Poxitar® |
Steel:
| Layer | Product |
| Primer | 1 × Friazinc R (recommended for heavy mechanical exposure area) |
| Seal coat | 1–2 × Inertol® Poxitar® |
Tensile adhesion strength
| ≥ 1.5 N/mm2 | (EN 1542) |
Heat resistance
+60 °C
Chemical resistance
| Test medium | Temp. | 24 h | 3 d | 7 d | 90 d |
| Sea water (5% NaCl in aqueous solution) | 30 °C | A | A | A | A |
| Water | 30 °C | A | A | A | A |
| Nitric acid 10% | 30 °C | A | A | A | D |
| Hydrochloric acid 10% | 30 °C | A | A | A | D |
| Sulphuric acid 10% | 30 °C | A | A | A | D |
| Diesel | 30 °C | A | A | A | A |
*acc. IS 4631-1968
A = resistant, D = resistant with discolouration and/or loss of gloss, C = not resistant
Dry film thickness
~70 microns per coat
Application
Mixing ratio
Part A : Part B = 16 : 84 (by weight)
Ambient air temperature
+10 °C min. / +30 °C max.
Relative air humidity
75 % max.
Dew point
Beware of condensation.
The substrate must be at least +3 °C above the Dew Point to reduce the risk of condensation, which may lead to adhesion failure of final finish. Be aware that the substrate temperature may be lower than the ambient temperature.
Substrate temperature
+10 °C min. / +30 °C max.
Substrate moisture content
< 4 %
Test method: Sika®-Tramex meter, CM - measurement or Oven-dry-method. No rising moisture according to ASTM (Polyethylene-sheet).
Pot life
~2 hours (5 kg, +30 °C)
Curing time
~7 days at +30 °C
Note: Times are approximate and will be affected by changing ambient conditions.
Waiting time / Overcoating
| Substrate temperature | Minimum | Maximum |
| +10 °C | 16 hours | 7 days |
| +20 °C | 8 hours | 7 days |
| +30 °C | 4 hours | 7 days |
Note: The waiting times between applications depend largely on temperature and weather. Lower temperature will increase the minimum and the maximum time specified. To ensure good intercoat adhesion, light grinding of the previous coat followed by a thorough de-dusting is required.
Consumption
Concrete:
| Layer | Product | Consumption |
| Primer | 1 × Inertol® Poxitar® + 5 % Sika® Thinner DS | ~0.15–0.20 kg/m2 |
| Seal coat | 1–2 × Inertol® Poxitar® | ~0.20–0.30 kg/m2 per coat |
Steel:
| Layer | Product | Consumption |
| Primer | 1 × Friazinc R (recommended for heavy mechanical exposure area) | ~0.15–0.20 kg/m2 |
| Seal coat | 1–2 × Inertol® Poxitar® | ~0.15–0.20 kg/m2 per coat |
These figures are theoretical and do not allow for any additional material due to surface porosity, surface profile ,variations in level and wastage etc.
EQUIPMENT
Inertol® Poxitar® must be thoroughly mixed using a low speed electric stirrer (300–400 rpm) or other suitable equipment.
SUBSTRATE QUALITY
Concrete
- The concrete substrate must be sound and of sufficient compressive strength (minimum 25 N/mm2) with a minimum pull off strength of 1.5 N/mm2.
- The substrate must be clean, dry and free of all contaminants such as dirt, oil, grease, coatings and surface treatments, etc. If in doubt apply a test area first.
- Weak concrete must be removed and surface defects such as blowholes and voids must be fully exposed.
- The concrete or screed substrate has to be primed or levelled in order to achieve an even surface.
Steel
- Steel surfaces must be dry, free from oil, grease and dirt, rust and other contaminants that may inhibit bonding properties.
SUBSTRATE PREPARATION
Concrete surfaces
- Concrete substrates must be prepared mechanically using grinding, wire-brushing, abrading, scarifying or preferably by high pressure water/sand blasting equipment to remove cement laitance and achieve an open textured surface.
- Weak concrete must be removed and surface defects such as blow holes, cavities, pinholes and voids must be fully exposed.
- Repairs to the substrate, filling of blowholes/voids and surface levelling must be carried out using appropriate products from the Sikafloor®, Sikadur® and Sikagard® range of materials. High spots can be removed by grinding.
- All dust, loose and friable material must be completely removed from all surfaces before application of the product, preferably by brush and/or vacuum.
Steel surfaces
- For steel substrate sand blasting or wire brushing is essential.
- For immersion service, sandblast cleaning is required to remove all surface contaminants (paint rust, mill scale, etc) from at least 95 % of surface area of any section.
- For non-immersion service, a commercial blast cleaning is required to remove almost all rust, mill scale and foreign matter (the remaining surface should be greyish in colour).
- Coating in all cases with prepared metals must proceed without delay and certainly within 4 hours of preparation.
- For heavy mechanical exposure, priming with Friazinc R is recommended (refer to the Product Data Sheet of the specified product).
MIXING
- Stir Part B thoroughly to remix any settled part.
- Add Part A and mix thoroughly with an electric stirrer for 3 minutes until a uniform mix has been achieved.
APPLICATION
- Apply to concrete or steel surface using airless spray, conventional spray, brush and/or roller. A minimum of 2 coats must be applied.
- Brush application: With distemper brushes, round brushes or radiator brushes.
- Roller application: With short pile lamb skin roller
CLEANING OF TOOLS
Clean all tools and application equipment with Thinner C immediately after use. Hardened or cured material can only be mechanically removed.