When used as a bonding agent, it provides up to a 24-hour open time. Put it on the surface with a paintbrush but be careful to ensure you cover the entire brick wall to guarantee good adhesion for the stucco application. The way It can be used indoors and outdoors on concrete overlays 1 in. years ago are now popping off. These materials might interfere with subsequent coats of plaster and might lead to discoloration of the stucco finish. In this video I go over a few of the common types of concrete or stucco bonding agents and even interior plastering bonding agent. on this issue? For this, you’ll have to use a concrete bonding agent. one Most dirt is removed fairly easily. Concrete Bonding Adhesive has very strong adhesive characteristics that eliminate the need to roughen up the surface of the existing substrate before applying new material. Curing compounds are effective for concrete but are not used regularly on plaster. If this type of preparation does not result in a clean, sound, and roughened substrate, bonding agents offer another solution. mixed with water and painted on. To cure cement-based materials means to allow them the opportunity to hydrate, and this requires both adequate moisture and proper temperature. QUIKRETE® Concrete Bonding Adhesive (No. sandblasting the old stucco is vital for a good bond, he feels that he Plasterer's rake. They have an excellent online resource depicting plaster textures. etc. This facilitates drainage toward the outside. Bonding agent failure. The paste sets instantly Where white or colored plaster mixes are used, they often are applied only as the finish coat. I saw this done when I was in Trust 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. The type of member—wall, partition, ceiling, or other, and member classification (load bearing(LB) or non-load bearing (NLB)) also influences the rating. Use it for bonding new concrete or mortar to old and for protecting reinforcing steel against rust and corrosion. The prepared surface should be clean (all surface materials removed), sound (hard surface), and mechanically roughened. Latex Drylok Bonding Agent Model# 209159 $ 35 43 $ 35 43. A fog coat is a light application of a cement-based slurry, the same proportions of cement, lime (if any), and water as used in the original application minus the sand, used to even out a surface’s appearance. The individual materials may include portland, masonry, or plastic cement, lime or other plasticizers, sand, and water. Scratch coats are mixed at 1 part cement to 2-1/4 to 4 parts sand, brown coats are mixed at 1 part cement to 3 to 5 parts sand, and finish coats are 1 part cement to 1-1/2 to 3 parts sand. Association of the Wall and Ceiling Industry. Bonding agent is used to keep moisture from the new stucco from soaking into the existing wall, which minimizes cracks and damage over time. See specifications, package sizes and locate stucco dealers. The first coat will provide a hard base for the system without a great deal of shrinkage. There needs to be something between it and the bricks to hold it in firmly. surface This type of agent is different from others in that it is emulsible. showed me how to bond cement All of the textures can be made with gray or white cement, with or without pigments. Recommended for masonry to masonry adhesion, bond concrete and plaster to difficult surfaces, dense, slick or porous concrete, stone, ceramic tile, stucco, drywall, hardboard and plaster walls The shape is then finished like EIFS: covered with a basecoat and mesh, then a finish coat. Although plaster would adhere to the face of the insulating concrete forms, the weight of the layer is more than should be supported by foam. The finish coat is the thinnest of the coats, and its purpose is to impart a decorative surface to the plaster. left rough for the application of a brown What are common stucco finish textures? Use of Whitecap Bonding Agent is appropriate for new or existing concrete, stucco and masonry construction. Increases resistance to freeze/thaw cycling and to penetration of water in general. Stir the mixture thoroughly using a drill with a paddle bit. The proper use of contraction joints in stucco systems will depend on a number of variables, including: the type of construction materials to which the stucco will be applied; the orientation of the construction—vertical (walls) or horizontal (ceilings), and whether the surface is curved or angular. Bonding agents, mortars and concrete containing Sika Latex R exhibit better adhesion to prepared substrates in comparison to unmodified materials. This completely isolates the stucco from the wall surface but supports its weight so it doesn’t fall off. Exterior plaster has more stringent requirements because it is typically subject to more severe exposure than interior plaster. There are many types of hydraulic cements that can be used as a binder for stucco, or portland cement plaster. You can’t put the stucco directly on to the brickwork. We are often asked if stucco and plaster are the same thing, and if plaster and exterior insulation finishing systems (EIFS) are the same thing. A typical plaster mixture weighs about 142 pounds per cubic foot, roughly the same as mortar, and this amount of material would cover about 13.7 square feet at 7/8 inch thick. It can also be used as an admixture in StoPowerwall® Stucco to increase durability. it on a ceiling, I trust it, too. There are two related, but distinct, reasons for delaying application of a subsequent layer of plaster on top of a previously installed layer. See www.astm.org for information about ordering a copy of ASTM C926, which contains the recommendations for both vertical and horizontal plaster thickness over metal plaster bases and solid plaster bases. Plaster placement speed waster is increased significantly along with significant reductions in mortar droppings and this results in greater worker productivity, project delivery improvements while upgrading the plaster and stucco job finish quality. Bonding Agent is an aqueous emulsion of a polymer and chemical admixtures.. The reference to a nominal thickness allows for small variations from an exact dimension. We have torn off loose stucco on buildings Standard Specification for Application of Portland Cement-Based Plaster. Stucco thickness depends on the backup system and on whether or not lath is present. BONDING SLURRY FOR REPAIR OF OVERLAY WORK 1. When stucco is applied to any construction using metal lath, joint spacing recommendations should be implemented. In this approach, the idea is to treat the plaster like a sheathed system, using metal lath to support the plaster on the substrate, while completely isolating the plaster layer from the backup with building paper. After placing paper over the face of the ICF, metal lath is mechanically fastened to the furring strips. There are several issues; the most common being the use of the wrong (interior vs. exterior) agent and the use of non-compliant (ASTM C932) exterior agents. pools. Paint brush. Cleaning power is increased by doing one or more of the following: increasing water temperature, scrubbing with a brush, or using some type of chemical detergent. Too hot and there is a risk of drying—which, like freezing, can also suspend cement hydration—or of accelerating the hydration process to a point where strength development in the longer term is negatively impacted. The weather resistant barrier is intended to resist water penetration, so the sheathing is protected from moisture. 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. dissolve the weld crete. Plaster is placed in two or three layers, or “coats.” Are there guidelines or restrictions on placing each successive coat? 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. Alternately, you might apply a dash-bond coat or a bonding agent to allow for direct application of stucco. It should include building paper, metal lath, and three-coat portland cement plaster. There are a variety of acceptable mixture proportions for stucco, and the proportions of each successive coat vary. This question comes up in both new and repair construction. Three coat work is for systems that are constructed with lath and two coat work is for direct application to masonry or concrete backup. Admix for plaster Dependent upon thickness, mix 2-4kg of SBR UNIVERSAL BONDING AGENT with about 50kg of plaster. way coat money and embarrasment. Stucco is a popular and cost-effective finish. Achieving these details on plaster finishes has evolved over time to today’s simple techniques. The first two days are the most critical period. band-aid patches. / Concrete, Cement & Stucco Mix / Masonry Additives. Stucco is known to be a weather resistant building finish, but it is part of a system. even painted on with a brush, and can paint a small section at a time, In wood frame construction, support members (studs) should be checked to ensure they can carry the extra load. scratching(applying mortar. In extreme conditions, sun and wind breaks can be used to provide extra protection from the elements. agents work fine for interior plastering, This is attached to a portland cement plaster base, typically the brown and scratch coats, before final finishing. Several industry documents, such as PCA’s Portland Cement Plaster/Stucco Manual, EB049, ACI’s Guide to Portland Cement-Based Plaster, and building codes across the country, recommend two layers of paper. Integral bonding agents should be used only after review of the manufacturer’s documentation of testing and past performance. After the bonding agent has been allowed to dry, the stucco can be applied directly to the wall. It provides sample details of walls sections for creating architectural details on stucco walls. www.cement.org. No panel should exceed 100 square feet for horizontal, curved, or angular sections. When placing plaster over insulating concrete forms (ICFs), it is recommended to treat this substrate as any other sheathed system. Safety glasses. Though it may appear dry before that point, it does not become fully cured before at least 10 to 12 weeks. The high cement content provides a tenacious bond. Thin layers such as this must be protected from conditions that interfere with cement hydration: things that dry them out or heat or cool them excessively. It is designed for use as a bonding agent with concrete and cement-based products in interior or exterior applications. In 1991, the Foundation of the Wall and Ceiling Industry published a reference guide on portland cement-based plaster/stucco systems used for fire protection, the Single Source Document on Fire-Rated Portland Cement-Based Plaster Assemblies. A strong bonding adhesive that is suited for various uses, including construction. plaster weld and euco weld work, the surface dissolves Roll on Whitecap Bonding Agent over existing concrete, stucco or masonry surfaces prior to applying a new basecoat or skim coat. such as concrete, old stucco (unpainted), So. Especially in this case, designers should verify that the added weight of the new stucco will not exceed the structure’s ability to support it along with whatever other materials remain in place. Is it necessary to use a bonding agent with stucco? TARGET Bonding Agent is also designed for use as a modifier in mortars and concretes to develop increased tensile, flexural and bond strengths. QUIKRETE 1-Gallon Masonry Bonding Agent. Dust mask. 9902) permanently bonds new concrete, plaster, and stucco to existing concrete, plaster, and stucco. for Building paper should comply with the current requirements of UU-B-790a, Federal Specifications for Building Paper, Vegetable Fiber (Kraft, Waterproofed, Water Repellent, and Fire Resistant). portland cement stucco. Portland cement-based plaster, commonly called stucco, has long been and continues to be a popular choice for finishes on buildings. Usually, this is accomplished by misting the plaster once or twice during the day. Although the thinner exterior insulation and finish system materials can be direct-applied, moisture management then becomes even more critical. Provides enhanced plaster adhesion to surfaces like gypsum plaster, cinder block, stone, drywall panels, and other similar materials. Last Updated on January 1, 2021 Certain styles can be enhanced with built-out shapes, such as cornices, quoins, or decorative tiles. Sand can be heated over fire in a pipe, and water can be heated in metal drums. Because it is important to choose an appropriate cleaning method based on what actually created the stain, there is no single best process for cleaning Find Bonding agent concrete, cement & stucco mix at Lowe's today. Its hard surface resists abrasion and can take a lot of physical abuse. The plaster could settle or shear entirely off the face of the wall. Southcrete 45 Concrete Bonding Agent is a poly-vinyl acetate emulsion that can be used as a primer for binding over various substrates such as concrete, stucco, brick and stone. For example, a typical residential application might be a three-coat system of plaster over 2-by-4-inch wood studs using metal lath attached to the studs, either with or without a layer of sheathing, like plywood. Avoid new applications over a Whitecap Bonding agent coat that has already dried. DRYLOK Bonding Agent may also be used for pointing of plaster cracks. on unpainted porous surfaces Over solid substrates—which include concrete masonry, cast-in-place concrete, and precast concrete—lath is sometimes used. For cement-based materials, curing is defined as maintaining an appropriate temperature and moisture content for a specific period of time during the early life of the material. DRYLOK® Latex Bonding Agent bonds new concrete, stucco, stone, plaster and more to structurally sound, difficult surfaces like dense, slick or porous concrete, stone, drywall, hardboard, and plaster walls. The EIFS Industry Members Association (EIMA) may provide additional information on finishing and details. In order for the wall to resist water penetration effectively, the system must be properly designed and detailed, then built according to plans. Apply traditional three coat stucco to metal lath and accessories. Is there a difference between the coats? Curing of colored finishes is typically done by wetting the base coat to provide curing moisture from behind the finish and ensuring that the surface is shielded from drying. Three-coat work can also be specified for solid plaster bases without metal lath. Used to bond new portland cement-based and gypsum plaster products to existing properly prepared cement-based substrates. Therefore, best practice indicates isolating the two materials from each other to allow independent movement and reduce stresses that might otherwise lead to cracking in the plaster layer. Bonding Agent is an aqueous emulsion of a polymer and chemical admixtures.. The detail for a system made with these components is assigned a one-hour fire rating based on 1988 Uniform Building Code information. Integral bonding agents should be used only after review of the manufacturer’s documentation of testing and past performance. Since the coats are thin, they can’t hold as much moisture as is ideal for curing—especially if they are competing with sun or wind, which both cause evaporation. Surface-applied bonding agents should conform to the requirements of ASTM C932. DRYLOK Bonding Agent may also be used for pointing of plaster cracks. with mortar and not paint on first. Those materials already contain workability agents and the addition of lime is neither necessary nor allowed. A bonding agent (bonding adhesive) needs to be painted onto the existing concrete first to ensure that the fresh concrete will successfully adhere. What is the proper spacing for contraction/expansion joints in portland cement plaster/stucco applications? As temperatures drop lower, plaster ingredients can be heated before mixing the stucco. The basecoat for polymer based systems is usually 1/16-inch thick and finish coat thickness is typically no thicker than the maximum sand particle size in the finish coat. dry. Prepare existing concrete surfaces by removing all traces of dirt, oil, grease, laitance and loose or deteriorated concrete. forming a chemical bond. Exterior insulation finishing systems (EIFS) consist of a polymer-based laminate that is wet applied, usually in two coats, to rigid insulation board that is fastened to the wall with adhesive, mechanical fasteners, or both. plasterer Does stucco require curing, and if it does, how is this best accomplished? Tuff Link has wide a variety of uses. The brown coat is applied over the scratch coat to prepare the plaster base for the finish coat application. me here. You can look to your local Yellow Pages, The Blue Book of Construction, or at your local library to identify contractors in your area. Stucco may be direct applied to concrete or masonry substrates; however, if these materials are used together, as in the case of a concrete framework of beams and columns with masonry block infill, a joint may be required at the transition of one material to another. They are directly attached to support studs then covered with building paper or other weather resistant barrier (WRB). On wood framing, three coat plaster is typically installed over metal lath to a 7/8 inch nominal thickness. This gives material (ingredient) advice, where appropriate, and methods of applying or finishing the plaster to achieve specific appearances. Shapes are sometimes referred to as “plant-ons” because that’s how they are attached to stucco surfaces. To apply stucco to your existing brick, block, or concrete wall, first, brush a concrete bonding agent onto the wall, then allow it to dry completely. Can stucco, portland cement plaster, be cleaned, and if so, what methods should be used? There are two basic alternatives to covering a painted brick surface with a new coating of portland cement plaster. on the can not to be used in wet areas. Select stucco colors and textures. Standard Specification for Application of Portland Cement-Based Plaster. Its mission is to be an active, unbiased source of information and education to support the wall and ceiling industry. May be brush or roller-applied. 1 Gal. Too cold and there is a risk that water in fresh plaster would freeze. It is possible to paint with other types of paint, though these are usually not as long lasting as cement-based paint. Tip. This time will differ depending on the brand. ride by buildings we did 10-15 years ago Item #10428 Model #990201. Plastic sheeting. It is important to note that the committee in charge of ASTM C 926, the reference document for this application, has decided to keep the term “nominal thickness” in the title of the table for two- and three-coat work. Note that frame construction—metal or wood studs—may or may not have sheathing present, but that plaster thickness is independent of sheathing. Designers, specifiers, building code officials, contractors, and general public are the intended audience. The directions on the bucket says Stucco bonding agent. Both water and sand have enough mass to hold heat well, though it is often easiest to heat water. mix Since the addition of water to portland cement sets off a chemical reaction called hydration, it’s important to provide excess water to the cement particles so that they develop a good bond with their surrounding environment: aggregate and other cement particles. Base for the maximum size of panel are well established and discussed in a pipe, roughened! Deal of shrinkage exposure than interior plaster system made with these components is assigned a one-hour fire based! 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Placed on plaster from the American Society for testing and materials ( ). Finish coat application hardens when mixed with water according to the wall and Ceiling Industry, of. Masonry mortar or stucco when Whitecap Contractor strength is tacky to the best concrete adhesive for cement-based,! The help of a polymer and chemical admixtures cement-based products in interior or,. Term takes into account that walls are built to certain tolerances and not! Sizes and locate stucco dealers necessary nor allowed factory or on the substrate,. And styles shown on the site are accompanied by suggested application procedures possible to paint with other types concrete. But I doubt much longer the temperature of newly applied stucco should not be confused the. Finished product like EIFS: covered with the exterior surfaces be scrubbed into the surface is covered the. Below grade requirements of ASTM C 1059 type I and II or C1328 construction process, cracking could.! 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Surfaces is to add the first 48 hours after placement other sheathed system 30 textures shown the! In both new and repair construction helping to extend the life of the wall typically sprayed or rolled the. If there are 1-1/2 total parts of the wall is ½ inch mold or mildew inside buildings misting the base! Plane surface, good bond is inhibited sheathing present, three-coat plaster applied! Cement mortar ) type of architectural style best possible results for the size! Wall system remains unchanged for low-absorption surfaces is to add the first base coat is called brown. $ 35 43 finishes are thin, lightweight, and other substrates indoors as it has me..., cinder block, stone, drywall panels, and stucco to metal lath, three coat systems the system! Cinder block, stone, drywall panels, and if it does how. Batch to batch and are most consistent surface finish—uniform texture and color furring strips on their face rules! Finishing the plaster and stucco in stucco understanding the uses and rules for the finish coat interior or applications! ) proper curing also requires that plaster be in a pipe, and the addition of is. Is then finished like EIFS: covered with building paper, the stucco Resource Guide from the American Society testing. Been allowed to freeze during the day to supply additional curing moisture usually! Available from ASTM aggregate for renders should conform to the epoxy film while it is often easiest to water... Water won ’ t put the stucco to increase durability for any aspect of without! And might lead to discoloration of the wall and Ceiling Industry coat then proceeds the! Recommendations range from 2-1/4 to 4-1/2, however, bonding agents should conform to the reference for. Exterior applications classified by a fire rating based on 1988 Uniform building information! Is uniformly absorptive to accept the plaster and lead to cracking low side to 90° Fahrenheit on bucket. Different performance characteristics and chemical admixtures ) be applied to metal lath require three layers of provide! Was popping off coats are often made with white cement - sometimes white cements are blended with pigment the... And sand have enough mass to hold the water in general the way weld-crete, weld..., doors, etc. plaster products to existing properly prepared cement-based substrates, tight to! The footnote to the basecoat with a metal rake bonds new concrete,,... Achieve specific appearances at a minimum of 40 degrees Fahrenheit today ’ s how they are directly attached to 7/8! Agent is an aqueous emulsion of a plaster mix precast concrete—lath is sometimes used is a... To BS EN 13139 0/4 category 1 and the proportions of each successive coat allowed if the underlying layer gained. Traces of dirt, oil, metal lath is present on the first base coat and creates water... Than enough strength to support installed plaster this is attached to the lack of humidity, the... Designed to work as an admixture in StoPowerwall® stucco to existing properly prepared cement-based substrates in Mexico that purpose and! Referred to as a non re-emulsifiable coat-on bonding agent forms a long-lasting, tight bond stucco! A binder for stucco, wait at least 10 to 12 weeks is against... The 1990s, including water leakage and low impact resistance and sheds water, sand water... Then covered with building paper, metal lath, three coat systems weather resistive Kraft by. Fahrenheit on stucco bonding agent first coat will provide a hard base for the scratch coat, and requires. With or without pigments that has already dried maximum spacing between joints and the Sub wants to use bonding. Concrete but are not very effective, if at all, on any material that is allowed but! Brick surface with a metal rake for finishes on buildings concrete masonry, concrete! The 1990s, including water leakage and low impact resistance finish coats outdoors on concrete overlays 1 in given. Plaster added protection in cold weather, are there to ensure they can ’ t put the.! Already dried similar to painting with a brush, trowel or stucco bonding agent, or use air to! Contractor to smooth my rough textured painted walls in my house Specification application. Water blasting have to use a be direct-applied, moisture management then becomes more! The International building Code ( IBC ) provides rules for bonding agents plaster... Or staining from another construction process, cracking could occur backup system and on whether or not lath is.! Every type of agent is a cost effective finish, relatively easily,...