Knowde Enhanced TDS
Identification & Functionality
- Technologies
- Product Families
Features & Benefits
- Ready-to-Use Product Features
- Features & Benefits
- Ultra waterproofing, low water vapor transmission
- Full adhesion to substrate
- Resists peeling and stays in place
- Superior flexibility and elongation
- Greater protection against new cracks forming
- Remains flexible even at low temperatures
- Resists tearing when stretched
- Superior resistance to alkali, salt, fungus and weathering
- Breathes, but won't allow liquid water to pass through
- Easy application with airless, conventional air, roller or brush
- Water-base for easy clean-up and low odor
- High solids, low shrinkage
- Extremely tough: highest tensile strength in its class
Acrylastic 490 Wall Coating is designed to coat over properly primed interior and exterior concrete, masonry stucco, most wood and metal substrates. It is especially recommended for use over:
- Cracked, uneven or unsightly surfaces
- Surfaces where water penetration and degradation pose problems
- As an encapsulator coating over asbestos and lead
- Areas where long-term surface protection is desired and continuous repainting costs are prohibitive
Acrylastic 490 is part of
- Primer Butylseal 572 provides a firm foundation and excellent sealing while maintaining enough tack to securely apply a base coat
- Base Coat - Acrylastic 490 is a waterproof wall coating that provides long- term protection over a variety of surfaces
- Top Coat - Sunshield 3800 is a highly reflective top coat that provides excellent solar reflectance and UV resistance. Hard, durable, easy to clean and resistant to microbial growth
Applications & Uses
- Applications
- Application Area
- Applications & Uses
Surface Preparation
All surfaces shall be clean, free from dirt, release agents, wax, mildew and all other contaminants, including salt deposits. Remove all old loose paint. All porous surfaces shall first be primed with Davlin's Butylseal 572 including: new wood, concrete, masonry and slightly chalky substrates. Metal surfaces shall first be primed with a suitable metal primer. Old wood surfaces shall be primed with an oil base primer.
CRACKS
Prime all cracks with Butylseal 572. For cracks 1/32 inch or less apply Acry lastic 490 and roll in. On larger cracks not exceeding 3/8 inch, fill with Acryflex 1210. On cracks exceeding 3/8 inch, treat as expansion joint using a polyurethane foam backer rod and expansion joint compound or repair with a masonry patching com- pound. Never feather out caulk. Remove all excess caulking material from around the crack to avoid an uneven appearance after applying Acrylastic 490. (Acrylastic 490 will not prevent the (re)appearance of cracks due to structural movement at expansion joints, settling or earthquakes.)
Application Procedure
Flush all equipment with water before use. Stir Acrylastic 490 thoroughly until uniformly blended. Avoid excessive mixing to prevent air entrap- ment. Do not thin. Spray apply a wet coat in even, parallel passes. Overlap each pass 50 percent to avoid holidays, bare areas and pinholes. If required, follow with a cross spray at right angles to first pass. On rough surfaces, back roll first coat to ensure that coating is pushed deep into surface. Spray or roll second coat at right angle to first. Allow second coat to dry 24 hours and no more than 7 days before testing for dry film thickness by removing samples of the coating for micrometer thickness measure- ments. Examine and inspect applied coating for pinholing and air entrapment. Repair damaged areas. Clean equipment with water or water and detergent immediately after use. Drying time to recoat @70°F: 4 8 hours dry through.
Application Equipment
The following is a guide; suitable equipment from other manufacturers may be used. Changes in pressure and tip size may be needed for proper spray characteristics.
- Airless: Standard equipment such as Graco Bulldog Hydra Spray 30 or 45:1 pump with a 0.025 - 0.031 inch fluid tip.
- Conventional: Industrial equipment such as Binks II: 1 Saturn pump or equivalent with air control cut-off, a material hose 3/4 inch ID minimum and an air hose 1/2 inch ID and 50-75 p.s.i. air pressure minimum. Heavy mastic spray gun such as Binks 7E2 with 1/4 inch fluid tip or larger and slotted nozzle.
- Brush or Roller: Suitable for waterborne coating. Multiple coats may be required to achieve specified DFT. Roller nap will vary according to texture of substrate and thick ness of coat.
Properties
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Accelerated Weathering (50000 Hrs) | No chalking, no sheen lossdegradation, no discoloration | — | 14 ASTM D822 |
| Alkali Resistance | No effect | — | 10 Fed. Spec TT-C-555B, GSA ex. 1 |
| Coats | 2.0 | — | — |
| Curing Mechanism | Air Dry | — | — |
| Dry Film Thickness Per Coat | 8 - 12.5 | mils | — |
| Flash Point (SETA) | min. 215 | °F | — |
| Fungus Resistance | No growth | — | 11 Fed. Std. 141 [6271], note 2 |
| Heat Stability | No change | — | 12 Fed. Std. 141 [6051] |
| Impact Resistance | min. 60 | in-Ib | 8 Fed. Std. 141 [6226] |
| Low Temperature Tensile Elongation (0°C) | 600.0 | % | 3 ASTM D2370, 1 in./min. |
| Moisture Vapor Transmission (20 mils DFT) | 1.2 | perms | 4 ASTM E96, Proc. B |
| Peel Adhesion (Concrete) | 48.0 | psi | 5 ASTM D413 |
| Recommended Total DFT | 16 - 25 | mils | — |
| Resistance to Ponded Water | No film degradation | — | — |
| Resistance to Wind-Driven Rain (min. 100 mph, 75°C) | No Weight Gain | — | 13 Fed. Spec TT-C-555B, 4.4.7 min. 95mph req. |
| Salt-Spray Resistance | No rusting | — | 9 ASTM D1654 |
| Solids by Volume | min. 60 | % | 7 by application |
| Tensile Elongation (Break) | 1400.0 | % | 2 ASTM D2370, 1 in./min. |
| Tensile Strength | 2400.0 | psi | 1 ASTM D2370, 1 in./min. |
| Viscosity (Stormer) | 120 - 135 | KU | 6 ASTM D562 |
| VOC | max. 50 | g/L | — |