MASCO Catalog: Construction Liquid and Powder

Read manufacturers' data sheets for complete specifications, installation procedures, and MSDS precautions. Warning: Chronic health effect possible—inhalation of silica dust may cause lung injury/disease (Silicosis). Take appropriate measures to avoid breathing dust. See page 179-180 for more information. 136 MASONS SUPPLY COMPANY Oregon (800) 537-3407 ♦ Washington (800) 537-6216 ♦ www.MASCO.net Clackamas | Eugene | West Eugene | Hillsboro | Medford | Portland | Salem | Ridgefield | Seattle | Tacoma | Woodinville A 38 Screed Description : A 38 Rapid Set Screed is a precision-engineered, polymer- modified, cement screed that sets, hardens and dries rapidly. Applications: • Suitable for bonded, unbonded or floating screeds • Interior and exterior applications • Ideal for swimming pools and other wet areas • Install vinyl and wood floor coverings after just 48 hours • Can be used with in-floor heating systems • A 38 can be used for bonded, unbonded or floating screeds. The screed is mixed and applied in the same way as ordinary cement / sand screeds and can be used with in-floor heating systems. • Use for interior or exterior applications including swimming pools and other wet areas. A 38 can be walked on 3 hours after application and can receive tile or stone after just 4 hours, even when used as an unbonded or floating screed. After only 1 day, the compressive strength and tensile strength of A 38 exceed those that regular cement screeds achieve after 28 days Coverage: 56 - 57 sq. ft. per bag at 3/4’’ thickness. Specifications: All data based on a mixing ratio of (1) 50 lb. bag ARDEX A 38, 250 lb. screed sand and 7.5 quarts water at 70°F. Compressive Strength (ASTM C109/ mod – Air cure only): 28 days 6,300 psi Flexural Strength (ASTM C348): 28 days 775 psi Working time: 60 min Walkable: 3 hrs Install Tile / Waterproofing: 4 hrs Screed Type Min Thickness Max Thickness Bonded 3/4" (19 mm) 1.5" (40 mm) Unbonded 1.5" (40 mm) None Floating (Residential) 2.5" (63.5 mm) None Floating (Commercial) 3" (75 mm) None No. Size ARD A38 50 lb bag , 48/pallet MORTAR BED Tiling