Bonds concrete, plaster, and more to difficult surfaces Add to patching cement to increase the resiliency and elasticity of the patch Improves the performance of … I got sued when a house we did this The use of TARGET Bonding Agent in concretes and shotcretes also gives significant improvements in resistance to penetration by chlorides and de-icing salts. They are generally specified under C150, C91, or C1328. Shapes are sometimes referred to as “plant-ons” because that’s how they are attached to stucco surfaces. Use it for bonding new concrete or mortar to old and for protecting reinforcing steel against rust and corrosion. Integral bonding agents should be used only after review of the manufacturer’s documentation of testing and past performance. No Eliminates the need for roughing the surface before the application. Last Updated on January 1, 2021 Usual recommendations range from 40° Fahrenheit on the low side to 90° Fahrenheit on the high side. the mortar sets, it all dries together n For best results, apply in the shade at the rate of 250 sq. Compare. Trowel. 52. to concrete slabs with no failure. May be brush or roller-applied. trust Proper curing also requires that plaster be in a medium temperature range. This is also true of floor repairs, if concrete is used to fill gaps caused by damage. Concrete or masonry walls generally have sufficient structural strength to support the additional weight. plasterer Item # 10428 Model # 990201. The correct thickness is then 5/8 inch. surface Sand aggregates for screed should conform to BS EN 13139 0/4 category 1 and the recommendations of PD 6682-3. Plaster can be wetted periodically throughout the day to supply additional curing moisture; usually one or two times per day should suffice. However, in an insulating concrete forms-stucco installation, the paper’s primary function is to serve as a bond breaker and not as a weather resistant barrier between stucco and insulation, which have significantly different rates of expansion and contraction due to changes in temperature and moisture condition. The three coats consist of two base coats and one finish coat. It is designed for use as a bonding agent with concrete and cement-based products in interior or exterior applications. In addition to structural considerations, excess moisture within a wall creates a potential for mold or mildew inside buildings. The first two days are the most critical period. Where the edges of paper-backed lath meet, connections should be lath-to-lath and paper-to-paper. No panel should exceed 144 square feet for vertical applications. Portland cement-based plaster, commonly called stucco, has long been and continues to be a popular choice for finishes on buildings. It is typically sprayed or rolled onto the surface, similar to painting with a cement-based paint. This is attached to a portland cement plaster base, typically the brown and scratch coats, before final finishing. One Though it may appear dry before that point, it does not become fully cured before at least 10 to 12 weeks. If the unpainted stucco has a rough texture, or patches than would leave the surface with ununiform in porousness or texture, a basecoat or bonding coat may be desired before applying the finish. The main purpose of building paper is to keep water from contacting the substrate and structural support members—very commonly sheathing like plywood or oriented strand board (OSB and wood or metal studs—so that these materials stay dry. Where you find a competitor's lower price on the same stocked item, we'll beat it by 10 % Excludes trade quotes, stock liquidations, commercial quantities and MarketLink products. It’s a proven system that works in all climates. The systems may share similarities in application techniques or final appearance, but the systems perform differently in resisting weather, especially wet conditions. There needs to be something between it and the bricks to hold it in firmly. Probably the best-known bonding agent to plasterers is Plaster-Weld, made by the Larsen Products Corpo- ration, Rockville, Md. The acrylic mortar mix can be troweled on Cement bonding agents are specifically designed to work as an adhesive for cement-based materials, such as stucco. In ASTM C926, the Standard Specification for Application of Portland Cement-Based Plaster, thicknesses are provided for scratch, brown, and finish coats. You don’t really “buy” stucco so much as you buy the materials to mix stucco onsite or hire a contractor to do the work. Now that we are seeing cold weather, are there any restrictions on plastering at lower temperatures? Used to bond new portland cement-based and gypsum plaster products to existing properly prepared cement-based substrates. The basecoat material acts like a glue to hold the backside, then also embeds the mesh that goes over the top of the shape. Bonding agents, mortars and concrete containing Sika Latex R exhibit better adhesion to prepared substrates in comparison to unmodified materials. Hydrated limes, either ASTM C206 Finishing Hydrated Lime or C207 Hydrated Lime for Masonry Purposes, are also used with portland cement to provide workability. Local building officials should be consulted for further information about variations from the specified thickness. Industry documents contain guidelines for placing each coat of stucco in two coat or three coat systems. The choice depends on where the bonding agent will be used, and the likely use of the final floor surface. Does stucco require curing, and if it does, how is this best accomplished? Excess water in the fresh stucco mixture expands as it freezes, thereby compromising the strength and durability of the finished product. Bonding agent should be applied by brush or roller to at least 0.25 mm film thickness. crete stucco surfaces. They are used in swimming We may earn from purchases made through links in this post at no extra cost to you. The Technical Service Information Bureau (TSIB) is a trade group in southern California serving the needs of the wall and ceiling industry regarding lath, plaster, and drywall. Surface preparation for a bonding agent. DRYLOK® Latex Bonding Agent forms a long-lasting, tight bond to the original surface, helping to extend the life of the repaired area. be troweled on before it dries. Polymer based (PB) systems, sometimes known as thin coat, soft coat, or flexible finishes, are the most common. These finish coats are often made with white cement and pigments, providing the widest range of colors. It can, however, be adequately accomplished by preventing evaporation of moisture from the plaster—and placing the next layer of plaster on top of the other does that. The answer requires a thorough explanation. What is the proper spacing for contraction/expansion joints in portland cement plaster/stucco applications? that on this issue? This completely isolates the stucco from the wall surface but supports its weight so it doesn’t fall off. However, either one, or both, materials can be heated to give plaster added protection in cold weather. The intent of the specified thickness is to provide a reasonable system that, over many years, has proven itself to be weather resistant and durable. After placing paper over the face of the ICF, metal lath is mechanically fastened to the furring strips. It can also be used as an admixture in StoPowerwall® Stucco to increase durability. Admix for plaster Dependent upon thickness, mix 2-4kg of SBR UNIVERSAL BONDING AGENT with about 50kg of plaster. Can installation in too low a temperature be problematic for any aspect of stucco work, say, getting a durable finish? This bonding agent can be applied in a manner similar to paint: in a thin film using a brush, a roller or a spray gun. Ask the pros- May, 2002. While the polymer based skin repels water very effectively, problems arise when moisture gets behind the skin—typically via window, door, or other penetrations—and is trapped inside the wall. The EIFS Industry Members Association (EIMA) may provide additional information on finishing and details. To clean stains other than simple soiled surfaces refer to the reference documents for additional recommendations. gets wet, too. Plaster Bonder is an easy-to-apply plaster bonding agent that provides advanced adhesion to drywall, gypsum plaster, stone, and similar surfaces. 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