Weatherlastic ® Smooth
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Weatherlastic® Smooth DS433 Flexible, Waterproof Elastomeric Exterior Coating Description Weatherlastic Smooth is a water-based elastomeric wall coating. It is easily applied with an airless spray or roller. Weatherlastic Smooth is based upon a 100% acrylic, copolymer elastomeric resin, which provides excellent elongation and flexibility at low temperatures. The coating resists mildew growth and dirt pickup and is highly chalkresistant. Use Weatherlastic Smooth is recommended as a waterproof coating on properly prepared concrete, masonry, EIFS and stucco substrates. Properties Drying Time - A 22 mils thick wet film (to achieve an 11 mils dry film) will dry to the touch in 3-4 hours @ 21 °C (70 °F), 55% R.H. Protect from rainfall for 24 hours at 21 °C (70 °F), 55% R.H., longer when temperature is cooler and when relative humidity is higher. Testing Information – Testing is in accordance with SWRI’s Validation Program. For additional testing refer to the chart included with this document. Advantages • Bridges hairline cracks • Dirt Pickup Resistant • Mildew Resistant • Plasticizer free • Low temperature flexibility • Maximum adhesion • Highly chalk resistant Coverage Two coats of Weatherlastic Smooth are recommended. Coverage listed is for two coats at a thickness of 11 mils wet each, which yields a combined dry film thickness of 11 mils. A minimum 11 mils dry film thickness is required for warranted waterproofing performance. Approximately 6–6.7 m2 (65-72 ft2) per gallon. Packaging 25 kg (55 lb) weight in a 19 L (5 gal) pail for factory-tinted colors. 23 kg (50 lb) weight in a 19 L (5 gal) pail for tint bases. Final weight will depend upon level of pigment added to obtain desired color. Surface Preparation Refer to Guide Specification, DS140. Application Mix well prior to application. Recommended application method is by airless spray or roller. For detailed application instructions, refer to specifications. Thinning not recommended unless spraying. Clean Up Clean tools with soapy water while Weatherlastic Smooth is still wet. Storage Shelf Life - 2 years in unopened container. Store in a cool, dry location. Cautions and Limitations • Keep from freezing. • Not for use below grade or in immersion service. • In-service temperature limit is 93 °C (200 °F). • Weatherlastic Smooth must not be used on exposed exterior horizontal surfaces. • Minimum slope is 6 in 12 (27°). Maximum length of slope is 305 mm (12 in). • Weatherlastic Smooth colors are slightly darker than the same color in a Dryvit textured finish. Exact color match from batch to batch cannot be guaranteed. • Weatherlastic Smooth shall not be returned into any sealant joint. Instead a coat of Color Prime™, Weatherprime®, Demandit® or Weathercoat™ should be applied over the base coat that will be in contact with sealant. Warranty Weatherlastic Smooth comes with a written limited material warranty. Contact Dryvit Systems, Inc. for full details. Technical and Field Service Available on request.

Weatherlastic Smooth DS 433 Weatherlastic® Smooth Testing1 Test Test Method Results Resistance to Wind Driven Rain • Weight Gain (oz) ASTM D 6904 • 1.0 oz • Visible Water Leaks • none Moisture Vapor Transmission • WVT (grains/ft2•h) ASTM E 96 • 18.1 grains/ft2•h • Perms • 34.4 perm Tensile Properties • Tensile Strength (psi) ASTM D 412 • 105 psi • Elongation (%) • 690% Crack Bridging ASTM C 1305 No cracking Volume Solids (%) ASTM D 2697 46.8% Weight Solids (%) ASTM D 2697 56.6% Density (lbs/gal) ASTM D 2697 10.97 lbs/gal Passed 1/8 in diameter Flexibility ASTM D 522 @ -30 °F no cracking...