Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Product Type
- Technologies
Features & Benefits
- Ready-to-Use Product Features
- Features & Benefits
Features
- Si-Rex03 protects the substrate with excellent water repellency - it also allows the substrate to breathe almost unhindered. This property minimizes potential for peeling and flaking from entrapped moisture. The costing has a self-cleaning effect and excellent resistance to microbial attack; keeping the surface looking cleaner longer.
- The silicone resin binder is not just about water-repellency-its tough, quartz-like structure acts as "reinforcing" for excellent weather resistance that resists chalking and outlasts conventional paint systems; repaint intervals up to 15/20-years or more versus 7-8 years for that of conventional paints for significantly lower maintenand costs.
- Using only inorganic oxide pigments that are highly resilient to UV exposure, Si-Rex03 comes in a standard range of 200 earthy, fade resistant colors suited perfectly for concrete and masonry surfaces and a natural look that conveys quality.
- While durability and protection are key benefits of Si-Rex03, it is the look and finish that people notice; the mineral matte surface eliminates gloss and side sheen and colors appear clean and true whilst helping hide surface irregularities in mineral substrates. Exterior use only. Not for surfaces horizontal (roofs, decks) that can pool water or below-grade prone to hydrostatic pressure.
Benefits
Excellent Water Repellency- Protects the substrate by keeping it dry
- Provides a self-cleaning effect
- Minimizes microbial attack
High Vapor Permeability
- Open structure allows entrapped moisture to escape
- Reduces relative humidity (RH) within substrate to negate ASR
- and/or DEF occurrence
Quartz-like Structure
- High durability to weathering and UV exposure
- Resistance to dilute alkali and acids
- Tough and abrasion resistant
Performance Matters
- High adhesion for coating stability
- Resistant to chalking8
- Protection to extend service life of structures
Mineral Matte Finish and Inorganic Pigments
- Matte finish helps hide substrate irregularities
- Fade resistant colors even under severe UV exposure
- 200 standard colors in natural tones
- Computer controlled color tinting and color matching
Easy Application
- High opacity
- Can be applied in wide range of conditions
- Apply by roller, spray or brush
Water Based
- Easy Easy clean up
- Environment friendly
- Lower range VOC (Volatile Organic Compounds)
Applications & Uses
- Applications
- Application Area
- Compatible Substrates & Surfaces
- Applications & Uses
Practical Coverage: Allow substrate condition/texture and applicable loss factors.
Area of UseCast-in-Place Concrete Priming Si-Rex03 Precast Concrete Recommended yes Cement Stucco/Plaster Recommended yes Skim Coat Required yes Brickwork Required yes Blockwork Required yes Fiber Cement Sheet Required yes Stone Required yes Wood Required yes Metals yes Glass yes PVC yes Previous Painted
yes Site Preparation
Ensure all property, vehicles and surfaces not set for coating are protected from product, residue, splash and wind drift. Use drop cloths or other proven protective materials. Protect and/or divert pedestrian and vehicular traffic.
Surface Preparation
- Surface preparation to be undertaken in accordance with Preparation Standard SSPC-SP 13/NACE No. 6 Surface Preparation of Concrete as relates to vertical surfaces and conditions described therein. Notes to and further to and/or in addition to this Preparation Standard follow. All surfaces should be clean and free from contaminants such as dust, dirt and release oil, any loose concrete or grout removed. Surfaces may be slightly damp but not wet. Allow new concrete, masonry and stucco to cure a minimum of 14- days in favorable curing conditions prior to application. Allow cementitious patch repairs to cure a minimum of 3-days and up to 14-days subject to repair size and curing conditions. Fast set/high early strength patching material can reduce the cure wait period.
- If needed, pressure wash clean at up to 3,500 PSI to remove all dit, dust, grease, oil, loose particles, laitance, foreign material, peeling and defective coatings, chalk, form release agents, moisture curing membranes, etc. Remove all mildew. For tilt-up and poured-in-place concrete, commercial detergents and sandblasting may be necessary to remove sealers, release compounds to create an adequate key. Apply to concrete surfaces with pH level up to 10. For coastal area structures check for salt contamination.
Primer Bare Porous Surfaces
- Stucco, skim coat, concrete block, fiber cement sheet, brick and stone surfaces previously untreated generally requires priming with Si-Prime by Klaas Coatings prior to Si-Rex03 application.
- Primer-Bare Non-Porous Surfaces For cast-in-place and precast concrete priming is recommended using Si-Prime by Klaas Coatings prior to Si-Rex03 application. High compressive strength concrete may negate use of primer due to minimal substrate porosity.
- Primer- PVG, Aluminum, Galvanized Metal, Tile, Wood For non-cementitious surface types and specialist applications UltraCryl UnderPrep, a premium acrylic primer/sealer undercoat from Klaas Coatings or equivalent allows Si-Rex03 color/finish to be carried over onto PVC drains, sign supports and metal panels.
Previously Painted Surfaces
- Good Condition - The existing paint must show no signs of cracking, peeling or flaking. The surface must be cleaned to remove all dirt and contaminants by washing with an appropriate cleaner, rinse thoroughly and allowed to dry. If Surtaces are glossy, abrade with wire brush or sand dul to create an adequate key.
- Poor Condition- Remove all cracking, peeling and poorly adhered paint. clean surtace and remove all dirt and contaminants.
Stains
Address causes of efflorescence and other moisture-related stains. Stains caused by water, smoke, ink, pencil, grease, etc. should be cleaned as practical then sealed with a suitable sealer.
Cracking
- Hairline Cracks - Paint cracked areas first by brush filling to be flush with surface prior to the first coat.
- Larger Cracks- either patch with suitable filling compound to match surface texture or add fine silica sand to paint to make a putty. Fill in thin layers to be flush with the surface.
Holes, Honeycombs and Voids
Fill bug holes, air pockets and other voids with a suitable filling/patching compound. Match texture of the surrounding Substrate (1.e. smooth for in-situ concrete, grainy for stucco).
Application Equipment
Use roller, brush or conventional and airless spray.
Brush
Use a nylon/polyester brush. Avoid over-brushing that causes air bubbles.
Roller
Use 3/8" to 1/2" nap synthetic roller cover on semi-rough surfaces Such as precast; 3/4" to 1-1/4" on rough surtaces such as concrete block and textured stucco. Avoid rapid rolling that causes air bubbles.
Spray-Airless
Pressure, minimum. 2300 psi Tip, minimum.. Spray using a "cross coat" technique (horizontal pass followed by a vertical pass). Spray tip size may vary depending on equipment and 025 application methodology.
Cleaning
During application, if leaving equipment to stand, the spray heads should be left to soak in water to prevent blocking Al tips, spray head, rollers and brushes must be cleaned with large amounts of water at conclusion of work; spray equipment to be also flushed with water. After cleaning in water, flush spray equipment with mineral spirits to prevent rusting of the equipment. Use a solvent such as acetone to remove old dried material or use mechanical means. If equipment, such as spray heads, is accidentally left containing product, let soak in water for 24-48 hours. After soaking, run equipment or strip down if necessary; refer equipment manutacturer's guidelines tor care and cleaning.
Theoretical Coverage
Minimum of two (2) coats at 240-360 ft/gal per coat (6-9 m/ per coat) at 5 mil WFT per coat; note:- Surface texture and substrate porosity affects application rate; apply a test area to determine actual coverage
- Some colors and/or rough substrates may require three coats to achieve full opacity.
Practical Coverage
Minimum of two (2) coats @ 250 ft/gal per coat to attain 5 mil WFT per coat smooth cast-in-place concrete surface. Minimum of two (2) coats @ 250-290 ft/gal per coat to realize 5 mil WFT per coat high compressive strength (8,000-10,000psi) ultra- smooth finish precast concrete". (apply test area at 5 mil WFT per coat to determine actual spread rate given temperature, humidity and substrate finish conditions)
Note
Whilst touch dry within 15-minutes or so, and recoated within 24- hours, system requires 7-10 days to fully cure. There is no time limit to when the second coat needs to be applied by.Coating Application Notes
- Allow primer to cure for 6-hours (Si-Prime) prior to painting.
- Mix well prior to use, do not dilute. Use roller, brush or airless sprayer for a uniform first coat at 5 mils WFT; let dry for up to 12 hours (see RECOAT TIMES).
- Apply second coat uniformly at 5 mils WFT.
- Protect from rain for at least 12 hours or until coating is thoroughly dry/cured.
- Apply when ambient and substrate temperatures are between 50°F to 90°F.
- Do not apply if imminent weather conditions may cause improper curing of product.
Application Notes - Colder Temperatures At cooler temperatures, and the need for water-based paint to coalesce properly when temperatures drop belovw 50°F, within observed application limitations there can be a little latitude taking into account humidity, dew point and slight prevailing breezes. This is aided somewhat by silicone resin emulsion paint not forming a "closed film as it dries; its breathability allows entrapped moisture to outgas.
Ambient lemperature Conditions
- A minimum temperature level of 43°F and rising and at least 6F above the dew point is recommended; example, if the dew point reaches 42F then the minimum ambient temperature cut off would be 48'F. Substrate Temperature Conditions With low overnight temperatures, and propensity for a concrete to slowly warm in rising ambient temperature/exposure to the sun, the surface must reach at least 45°F before application of Si-Rex03 paint. Prior to proceeding, apply a test patch once the substrate surface temperature has reached at least 45°F and check for spread/film thickness/opacity, touch drying time and adhesion before proceeding with the general application making adjustments if necessary (e-g. allow the substrate surface temperature to reach at least 50'F).
- The key barometer is drying time. Under favorable drying/curing conditions Si-Rex03 is usually touch dry within 15-minutes. If paint comes off on one's finger when run over a painted area 45-60 minutes after being painted then drying conditions may not be suitable. Also, the day following application the paint should be checked in random areas for adhesion and thickness/opacity as a further assessment of the drying/curing process. There is no timelimit to when the second coat is applied.
When Spraying
- Work from the top down.
- Back roll spray applications for good adhesion and even coating thickness plus minimize pinholes.
- Brush out runs or drips.
When Rolling
- Always box paint for a given batch and section to be painted Brush out runs or drips.
- When applying the final coat always finish to an edge.
- Avoid painting in hot direct sunlight or on dry/hot windy days.
- Only touch up where the same tin or boxed batch has been used.
- Do not touch-up with unboxed or different pails.
Recoat Times
The 12-hour wait period before applying the second coat Si-Rex03 is a value to cover a scope of applications including those in adverse weather conditions such as cool temperatures, still wind, high humidity and near dew point during application and the subsequent drying/curing period. Recoat times can be substantially reduced under favorable drying Curing conditions. Such conditions broadly encompass application to a dry substrate in ambient temperatures ranging from 65°F to 85°F and lower humidity levels; a light breeze can also assist.2 Hour Recoat
If the first coat of Si-Rex03 is touch dry within 15-minutes; allow further 2 hours to dry/cure prior applying second coat Si-Rex03.
4 Hour Recoat
If the first coat of Si-Rex03 is touch dry within 30-minutes; allow further 4 hours to dry/cure prior applying second coat Si-Rex03.
Note: The full plane of applied material needs to be touch dry with the last area of application usually last to dry and/or there are areas with a slightly higher WFT (wet film thickness).
Application Method Roller, Brush and Conventional and Airless Spray
Coats 2 Coats Priming Si-Prime on porous surfaces and in higher temperature regimes to help assist with wet edge
Drying Time@ 25°C (77°F) & 50% Relative Humidity Touch- Dry 15-20 minutes typical
Drying Time@ 25°C (77°F) & 50% Relative Humidity Water- Resistant 6 hours
Drying Time@ 25°C (77°F) & 50% Relative Humidity Recoat- Within 2-4 hours of becoming touch dry Overnight (indefinite maximum)
Application Temperature Range (surface temperature) 50 F to 90F (10°C to 32°C)
Clean-up Water
Properties
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Color | 200.0 | - | - |
| Finish | Mineral Matte | - | - |
| Solids (By Weight) | 50 - 60 | - | - |
| Solids (By Volume) | 39 - 47 | - | - |
| Typical Thickness (WFT Per Coat) | 5.0 | mil | - |
| Typical Thickness (DFT Per Coat) | 2.2 | mil | - |
| Theoretical Coverage (Per Coat) | 240 - 360 | ft/gal | - |
Technical Details & Test Data
- Test Area
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Test each type of surface for suitability and results including color and finish before overall application. Make up a test area of a least 4 feet by 4 feet on each type of surface applying product to application guidelines. Let coating cure on each test area before inspection and check color, finish and adhesion. if priming with Si-Prime apply test area and check penetration and surface residue once dry.
- Excess residue, minimal penetration and/or poor adhesion may point to previous coating treatment or residual curing compound and may negate use of a primer. Keep test reference available throughout project.
Wind Driven Rain Resistancee ASTM D6904-03(13) (TT-C-555B)_ Pass | No weight change; no noticeable defects in the coating
Water Vapor Transmission ASTM D1653-12 Method B Wet Cup Method 38.13 Perms | WVT 13.878 grains/hr-ft2
Tensile Adhesion on Concrete ASTM D7234-1 ASTM D4541* Average Pull-Off Strength of 394.6 psi, 2.72 N/mm2 Average Pull-Off Strength of 710 psi, 4.9 N/mm2
Mold Resistance ASTM D3273-12 (after 500-hours accelerated weathering ASTM D4587-11 Cycle 2 QUV Exposure) No evidence of mold growth (28-days)
Abrasion Resistance ASTM D968-05(10) 31.31 L/mil Falling Sand
Accelerated Weathering ASTM D4587-11 Cycle 2 | 1,000-hours QUV Exposure No overall change observed in coating No Cracking, Flaking, Peeling, Softening or other defects noted
Flexibility ASTM D522-13 Method A Average Elongation 13.8% Average Resistance to Cracking 0.364"
Freeze-Thaw Resistance 50 Cycles to West Virginia DOT Protocol No Chalking, Checking, Cracking or other deleterious effects
Salt Spray Resistance ASTM B117 1,000-hours No Chalking, Checking, Cracking or other deleterious effects_
Solids by Weight ASTM D2369-03(08) 53.61% Solids by Volume ASTM D2697-03(08) 39.91% VOC D3960-05 1.97 Ibs/gal, 237 g/L
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Safety & Health
- Cleanup Info
- Dam any major spills and collect with suitable absorbent material such as cotton rags. Clean up spill remnants and any spatters immediately with soap and warm water.
- Clean hands and skin areas with soap and warm water.
- Dispose of contaminated materials, unused product and container in accordance with local, state or federal regulations.
Storage & Handling
- Storage & Handling
- Store in a cool, dry place. Always seal container after use. Do not alter or mix with other chemicals.
- Published shelf life assumes upright storage of factory-sealed containers in a dry place.
- Keep from freezing. Use appropriate safety and job site controls during application and handling.
Shelf Life 12-months from date of manufacture, best use by date
Pot Life 12-months from date of manufacture if sealed/stored correctly