Stucco & Rainscreen, Exterior Wall Assemblies
Stuc-O-Base is a wet-mix concentrate that when mixed 1:1 by weight with Portland Cement is used as an excellent adhesive and underlayment for use with acrylic finish coatings. Stuc-O-Base uses a high quality acrylic polymer that provides a strong bonding surface on several different types of foam as well as concrete substrates, creating a strong level platform for finish coat applications.
Mixing
Stuc-O-Base should be mixed 1:1 by weight (equal parts) with fresh, dry Portland Cement type I or II. Product should be allowed to sit for 10 minutes, then remixed & used immediately. Avoid retempering after mixing the Stuc-O-Base.
Application
Stuc-O-Base is usually applied with stainless steel masonry trowels at a nominal 1/16 -1/8 inch. It can also be spray applied with proper equipment onto the substrate, then troweled to smooth out the surface. Over approved foam substrates and the Waterway Drainable Stucco Assembly, Stuc-O-Base should be used in conjunction with fiberglass reinforcing mesh.
Adhesive Applications
Apply to the backside of approved insulation board with a 3/8 inch notched trowel. Apply ribbons over the entire surface running parallel to the short dimension of the insulation. Immediately adhere insulation to properly prepared substrate using firm pressure across the entire surface making positive contact. Place the board on the substrate about 2-3 inches from desired finished location and slide into place to ensure positive contact. Stagger all seams and joints, avoid gaps in foam surface.
Base Coat Applications
Apply with stainless steel masonry trowels at a nominal 1/8 inch. Stuc-O-Base can also be spray applied with proper equipment, then troweled to smooth out the surface. Immediately embed Fiberglass Reinforcing Mesh into wet base coat, troweling from the center to the edges. Overlap mesh 2 inches on all ends and edges. Avoid wrinkles and smooth out wet base coat to a minimum 1/16 inch thickness over mesh such that no mesh pattern is visible. Apply an additional layer of base coat if needed to achieve minimum thickness and provide a smooth surface prior to finish coat applications.
Light sanding of the Stuc-O-Base is acceptable to achieve a level substrate for the finish coat; usually this is best performed the day after initial application.
Skim Coat Applications
Apply mixed Stuc-O-Base in an adequate thickness to smooth and flush out imperfections in the substrate below. Allow to dry completely (24 hours minimum) prior to Stuc-O-Flex Finish Coat application.
After 30 years of formulating, testing and manufacturing vertical wall products, Stuc-O-Flex International, Inc. understands the appearance of any project is the one element that immediately reflects the quality and integrity of the building, as well as the construction team involved. Our mission as the top elastomeric coating manufacturer in the industry is to complement those efforts with products of the highest quality, like our elastomeric stucco finishes, and enhance cladding performance through Rainscreen configuration.
Stuc-O-Flex International created America's first Breathable Elastomeric Acrylic Stucco Finish back in 1984. More recently we've advanced the science of vertical wall Rainscreen in drainable Stucco, Stone, EIFS and siding assemblies to new levels with technologies unprecedented in past years. Our elastomeric stucco and sealants embrace the latest polymer technologies and help protect your building from moisture damage.
Unparalleled expertise in Acrylic Polymer Chemistry and our WaterWay line of Rainscreen Drainage & Ventilation Mats assures extended service life and exceptional appearance on your completed projects. Whether your design requires a decorative textured coating, direct applications to substrate sheathing, EIFS, Stucco, ICF finish systems, Drainable Rainscreen assemblies or applications to enhance standard metal building construction, no company offers a broader selection of wall cladding and configuration options.
Unequaled growth over the past thirty years and a listing in INC. Magazines' 500 Fastest Growing Companies reflects our philosophy and commitment to innovation, research & development, and uncompromising quality control.
Our robust ownership structure, sharing resources with two sister companies, support from six office locations across the U.S., along with distribution in 22 countries, underscore our stability and extensive experience. With over 500 Million Feet in service worldwide subjected to every conceivable climate, we look forward to supporting your next new construction, retrofit or remodel project. When client expectations demand exceptional performance, you want Stuc-O-Flex International.
