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Custom SYSTEM 45 Masonry Patching & Coating
 Edison Custom SYSTEM 45
products are two-component, latex-modified, cementitious compounds used to produce highly durable and compatible aesthetic repairs to masonry and concrete. They may
also be used as stone-like finishes on a variety of other substrates.
Over the course of more than two decades of successful application on Historic Register projects, Custom SYSTEM 45
masonry repair mortars have been matched to over a thousand different types and colors of natural stone, concrete and clay masonry:
In each case a mechanically compatible formulation is prepared, based on suitable aggregates of
similar composition, color and gradation to the material being repaired. Final color adjustment is achieved, where required, using low levels of highly stable inorganic pigments and fillers. Over the
past 26 years, Custom SYSTEM 45 has provided durable, inconspicuous repairs on a wide variety of structures, including churches, schools, monuments, post offices, courthouses, university
buildings, hospitals, libraries, railroad stations, apartment buildings, hotels, office buildings and private residences.
LINK TO PRINTABLE PDF PRODUCT DATA SHEET
FEATURES:
Custom SYSTEM 45 has been formulated to provide an optimum balance of the most important
performance properties. All of these properties influence the long-term performance and compatibility of the repair with the substrate.
 High Tensile Bond Strength (Adhesion)
Tenacious adhesion to all types of properly prepared concrete and masonry surfaces is a primary performance requirement for any repair material. Without high tensile bond strength, products are
prone to adhesive failure, and none of the other performance properties are of any importance if the product is no longer bonded to the substrate.
Custom SYSTEM 45 latex-modified cement-based mortars achieve higher direct tensile bond than the
competitive unmodified mortars. Performance exceeds recommended minimum levels indicated in ICRI Guideline 03733, Guide to Selecting and Specifying Concrete Repair Materials.
Low Modulus of Elasticity ("Stiffness")
Of critical importance to the durability of masonry repair materials is the elimination of stress between the repair mortar and the host substrate. Materials which are low in modulus of elasticity
(low in "stiffness") deform to relieve stress, as opposed to more rigid, higher modulus materials which may distress adjacent low strength substrates.
Custom SYSTEM 45 latex-modified mortars are able to achieve compressive strengths similar to
the substrate being repaired while maintaining lower modulus than the host material. This assures that the repair mortar always behaves as the softer material, relieving stress and preventing damage
or premature failure.
Appearance: Excellent aesthetic results are achieved, because color and texture are closely
matched to the existing masonry. Repairs can be virtually indistinguishable from original work, and both accelerated weathering (ASTM G-53) and natural exposure testing assure long-term color
retention. Formulations are UV-stable and non- yellowing.
Dimensional Stability: Practical field experience indicates that materials exhibiting high drying
shrinkage are likely to crack and fail prematurely. ICRI Guide #03733 encourages the use of materials with low shrinkage, which is defined as less than 0.05% drying shrinkage. Custom SYSTEM 45
meets this requirement, without the use of expansive components or formation of ettringite to compensate for shrinkage. The result is low stress cure and crack free, durable repairs.
Consistency: Custom SYSTEM 45 is more reliable and consistent in appearance and performance
than competitive non-latex mortars or simple field-mixed mortars. Color, composition and quality are rigidly controlled in the manufacturing process, and critical ingredients are single-sourced to
eliminate variations, even on projects extending over months or years and requiring many production batches. The two components are simply mixed together and applied, eliminating any
influence by variations in local aggregate, cement or water compositions. Under most normal application conditions, proper curing and strength are achieved without special procedures or
prolonged wet curing.
Permeability: Custom SYSTEM 45's latex-cement comatrix retains excellent moisture vapor
permeability (>40 perms at ½" depth), avoiding moisture entrapment at the patch/substrate bond line. Liquid moisture permeability is compatible with substrate permeability, allowing repairs to
meet the dual objectives of restoring building envelope integrity against moisture infiltration, while allowing internal moisture to escape harmlessly. For special situations requiring exceptional
permeability, use of Restoration Latex RL-4 doubles vapor permeability and increases liquid permeability tenfold.
Thermal Expansion: Coefficient of thermal expansion for each grade of Custom SYSTEM 45 is
matched to expansion coefficients of the substrate, allowing long-term durability in exterior exposures which are subject to wide temperature variations.
Composition: Part "A" (Restoration Latex RL-1, 2, 3, 4, 5 or 6) is a proprietary acrylic emulsion.
Part "B" is a cement-based blend of select graded aggregates, additives, fillers and pigments, with performance and workability- enhancing admixtures. No chlorides, added gypsum or corrosive or
deleterious additives are used.
Workability: Products are formulated for excellent workability under a wide range of repair
situations. Product is not formulated for fast set or rapid hardening, permitting fine tooling, carving, shaving, grooving or sculpting in the period following initial set. Standard RL-1
non-sag consistency allows unsupported build-up of up to 2" on vertical surfaces without sagging, up to 1 inch on overhead applications. Optional RL-2
superplasticized grade liquid allows material to be cast in forms without changing strength or color. RL-3 is a marine grade latex for use in high moisture exposures. RL-4
is a high permeability latex for use in situations where high levels of moisture will be present in the substrate. RL-5 hot weather grade latex doubles working life at temperatures up to
1200F.
Constructability: Custom SYSTEM 45 is "user-friendly". The product allows some adjustment in
working consistency and supports a wide range of acceptable application and finishing methods. In most cases special curing is not required, assuring that satisfactory results are obtained under a wide
variety of "real world" conditions.
Worker Training: Edison Coatings conducts "hands-on" regional training workshops throughout
North America on a regular basis. This optional course helps workers achieve optimum results with maximum efficiency. "On-Site" training is also available, to help entire crews achieve high-quality,
cost- effective repairs. Current workshop schedules can be found on our web site "Calendar" page and additional information on "in-house" and "on-site" programs can be found on the "Training" page at www.edisoncoatings.com.
Safety: Products are non-corrosive, non-flammable, non-combustible and contain no toxic solvents,
monomers or diluents. Low odor allows interior as well as exterior application. Powder components are formulated and graded to exclude toxic crystalline silica.
THE COLOR & GRADE SELECTION PROCESS
Custom SYSTEM 45
is available in 10 standard grades and over 1500 standard colors. Custom color matching is also available. For best results, send cleaned samples of the substrate to be
repaired to Edison Coatings, Inc. for free evaluation. Edison Coatings regional dealers often stock the formulations most commonly used in their area. Call for the nearest stocking dealer location.
The following are key elements in successful color selection:
1. Choose representative samples for matching. Choose color on the basis of the actual range of
colors on the building. Samples should be cleaned in the same manner, using the same cleaning agents that will be used for general building cleaning. Indicate the portion of the sample to be
matched by circling the appropriate area, or by placing an "X" in a corner of the side to be matched.
2. Use multiple colors. Stone and masonry are often variable in color, and better overall match is often achieved through use of more than one color of Custom SYSTEM 45
. Intermediate shades can be produced by blending light and dark shades of Custom SYSTEM 45 in any proportion.
3. Install test patches. The most accurate way to evaluate visual compatibility is through in situ test patching. Allow adequate cure time before final evaluation. Initial color should be darker than the
substrate.
FOR COMPLETE PRODUCT DATA AND INSTALLATION INFORMATION, REFER TO THE
PDF PRODUCT DATA SHEET
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