Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Product Type
- Technologies
- Product Families
Features & Benefits
- Ready-to-Use Product Features
- Advantages
- It provides resistance to the majority of concentrated oxidizing acids, such as sulphuric acid to 98%, hydrochloric acid to 36% and phosphoric acid to 85%.
- It is also resistant to hydrofluoric acid (with carbon-based filler) and a large number of concentrated alkalis and salts.
- By simply adding various filler materials to alter the characteristics of the two-component epoxy solution, means that the Novolac epoxies are exceptionally versatile and can be adjusted, depending on the circumstances and project needs.
Applications & Uses
- Markets
- Typical Uses
- It is one of the most corrosion-resistant materials on the market.
- It is an extremely flexible material that can be installed as a coating, membrane, mortar, screed or concrete, depending on the coarseness of the powder component.
- This versatility allows for its installation in a number of applications such as; general tiling/masonry work, trenches, pits, floors, walls, plinths, tanks and storage areas.
- Classifications
Typical Use Installed Thickness Filler (Particle Size) NE50 Paint/Coating 0.5 - 1 mm - - Chemical Resistance
Provides the maximum resistance to even the most aggressive chemical environments, including Hydrofluoric acid.
- Surface Preparation
- For all pre-existing surfaces of metal or concrete, abrasive blast or scarify to remove all laitance and surface contaminant.
- A primer base should be applied before application to ensure sufficient key.
- The surface should be dust-free and dry and the ambient temperature should be above the dew point of air.
- Prepare the substrate with either PE120 membrane (metal) or AC90 primer (concrete) to ensure an adequate bond with the the material.
- For new-build concrete constructions, a damp tolerant primer AC95 is recommended and can be applied within 48 hours of the concrete set, potentially expediting any construction schedule.
- It is recommended, to ensure a sufficient key between the primer and the product, that a light scatters of inert material (typically sand) is applied to the primer to provide a non-sheen finish.
- The product can then be applied once priming has been completed.
- For coatings and membranes on vertical surfaces, it is recommended to apply the coating of the product whilst the primer layer is still slightly tacky (ie usually within 2 hours of primer application).
- This will allow a bond to form between the primer and the top coat layer improving adhesion and reducing run or pooling of the top coat.
- When casting thicker slabs of the product, formers should be constructed of firmly braced wood or metal, which has been given a light coating of release agent.
- The release agent will prevent the product from adhering to the screeds or formers, but should not leave a residue on the freshly cast material.
- The formers are to be completely sealed and rendered watertight with heavy consistency pliable caulking. Seal formers placed over horizontal rough surfaces.
- Do not apply over any standing water. In severely aggressive environments, corrosion-resistant reinforcement must be used in place of formers.
- Do not impose loads until final set has been achieved.
- Lower temperatures will require longer cure periods.
- Application
- It typically comprises an epoxy solution and an epoxy-based hardener.
- Prior to application, the epoxy components must be mixed thoroughly before the addition of any filler powder.
- Ensure that both the epoxy solution and hardener components are at approximately 20°C before mixing to ensure a workable viscosity.
- Values are an intended guide.
Mixing Ratio 2.5 part Solution to 1 part Hardener By weight
By volume~25kg Solution to 10kg Hardener
~2.25L Solution to 1L Hardener
- For coatings and mortars, the epoxy solution and hardener can be mixed by using a paddle mixer.
- Place the epoxy solution in the mixing vessel first and then add the hardener.
- Mix thoroughly for at least 3 minutes.
- Where a filler powder is required, add slowly whilst mixing to the quantities stated in the table below and mix for an additional 3 minutes.
- For coatings, applied by paint brush, roller or float/trowel depending on thickness/application desired.
- Apply until a smooth coating has been established without allowing the materials to form into pools or flood the area.
- Leave to cure, and if necessary apply the second coat 12-16 hours but not later than 48 hours after the first, to even off the finish and give an attractive gloss.
- Where a secondary coat is required, the application of fine quartz scatters before full cure is recommended to provide a key for subsequent layers.
- Where necessary, enhanced strength and durability of the product coatings can be achieved through the addition of a fine weave glass matting material.
- For mortars, application should be made with either float or trowel to all jointing surfaces to ensure a complete chemical barrier.
- For all trowel/float applications, regular brushing of tools with solvents ensures a smooth (non-drag) finish.
- However, do not apply too much solvent or this will lead to blistering of the epoxy finish.
- All tools and equipment should be cleaned off with solvents and damp cloths to ensure their continued use.
- To provide anti-slip facilities to the coating / screed / concrete, it is recommended that the mixed product is allowed to cure for 1 hour before application of an antislip scatter material.
Mixing ratio of Mixed Novolac to Filler Powder NE50 None required - Coverage
Typical coverage rates on a relatively smooth concrete surface for a Novolac epoxy materials:
Typical Use Thickness Coverage NE50 Paint/ Coating 0.5-1mm 1 kg/m²
Properties
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Density | 1180.0 | kg/m³ | - |
| Specific Volume | 0.84 | m³/tonne | - |
| Tensile Strength | 11.5 | N/mm² | - |
| Compressive Strength | 80.0 | N/mm² | - |
| Flexural Strength | 80.0 | N/mm² | - |
| Bond Strength (Wire Cut Bricks) | 4.2 | N/mm² | - |
| Coefficient of Expansion | 16.0 | 10⁻⁶ °C | - |
| Water Absorption | 0.25 | % | - |
| Maximum Operating Temperature | 105.0 | °C | - |
| Coverage - Mixed Primer | 2.0 | m²/kg | - |
Regulatory & Compliance
- Certifications & Compliance
Safety & Health
- Safety
- Adequate ventilation must be provided whilst work is in progress and is compulsory for closed or indoor applications.
- The instructions on storage, fire and explosion are to be observed.
- No releases to the sewers or drains are to be permitted under any circumstances.
- Ventilation is required with special consideration for enclosed or confined areas.
- Air movement must be designed to ensure turnover at all locations in work area and adjacent areas to avoid build-up of heavy vapors.
Packaging & Availability
- Standard Packing
- Solution - 25kg in 25L UN drums (24 per pallet)
- Hardener - 25kg in 25L UN drums (24 per pallet)
- Powder - 25kg lined poly weave bags (40 per pallet)
Storage & Handling
- Pot Life
- at 20°C - 60mins
- at 30°C - 30mins
- at 40°C - 15mins
- An initial set occurs approximately 4hours after mixing, light foot traffic permissible after 12hours and with a full chemical cure occurring after 5-7days.
- The materials should never be exposed to water, steam or chemical environments before a full chemical cure is completed.
- Do not mix more material than required by pot-life.
- It cannot be reconstituted. Never add unapproved materials to the mix, in particular water.
- After mixing spread out on to the surface to avoid self-generated heat.
- Large mixed volumes that are not thinned will flash set, becoming extremely hot and producing smoke.
- Storage Information
Storage Condition:
- Store in a cool, dry, frost-free place.
- Normal storage conditions in up to 25°C.
- Do not store a combined stack of Solution and Hardener components.
- Accidental leakage could lead to flash setting of material, producing smoke.
- Storage at, or exposure to, high temperatures may initiate a setting reaction.
- Prior to mixing, ensure epoxy solution and hardener components are heated to approximately 20°C to ensure sufficient viscosity for mixing.
Shelf Life:
- Solution - 12 months
- Hardener - 12 months