| HS Code | 646888 |
| Redispersibility | Excellent |
| Minimum Film Forming Temperature | 0°C to 5°C |
| Bulk Density | 450-650 kg/m³ |
| Particle Size | 95% through 300 mesh |
| Ash Content | 10-15% |
| Ph Value | 7-8 (10% dispersion) |
| Setting Time Extension | ≤30 minutes |
| Flexural Strength | ≥8 MPa at 28 days |
| Adhesive Strength | ≥1.5 MPa |
| Abrasion Resistance | Improved, mass loss ≤0.3 g per test |
| Water Resistance | Water absorption ≤5% |
| Workability | Self-leveling with improved flow |
As an accredited RDP for Cementitious Wear Course Self-leveling factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 25 kg multi-layer paper bag with moisture-proof polyethylene liner, containing redispersible polymer powder for self-leveling cementitious wear courses. |
| Container Loading (20′ FCL) | A 20-foot FCL loaded with RDP powder in palletized, waterproof bags for cementitious self-leveling wear course applications. |
| Shipping | RDP (Redispersible Polymer Powder) for cementitious wear course self-leveling compounds is shipped as a dry powder in 25 kg multi-layer paper bags, palletized and stretch-wrapped. Protect from moisture and humidity during transport. Store in cool, dry conditions. Non-hazardous, non-flammable; standard dry cargo shipping applies. Shelf life: 6–12 months sealed. |
| Storage | Store RDP in a cool, dry, well-ventilated area, away from moisture, rain, and direct sunlight. Keep bags sealed in original packaging to prevent caking or polymer film formation. Avoid high temperatures and humidity. Unopened products typically remain stable for 6 months under proper conditions. Practice first-in, first-out inventory. |
| Shelf Life | Shelf life is 12 months from production if stored dry, sealed, and away from moisture. |
In cementitious wear-course self-leveling compounds, redispersible polymer powder (RDP) functions after mixing water evaporates by coalescing into continuous films that bridge the interfacial transition zone between cement hydrates and fine aggregate. In applications where the self-leveling layer is exposed to rolling wheel loads, disinfectant washdowns, thermal cycling, or de-icing salt, the RDP dosage and the binder system must be specified together; dosage windows based solely on compressive strength class routinely fail under surface-specific abrasion mechanisms. The downstream scenarios below are limited to installed configurations for which published industrial test data, standard classifications, and equipment constraints are available.
Where very narrow aisle reach trucks and racking point loads dominate, logistics facility slabs impose abrasion and flatness requirements on the wearing layer rather than on the underlying structural concrete. The relevant specification is commonly EN 13813:2002 classification CT-C30-F7, with Böhme wear volume measured under EN 13892-3. In this application, RDP is added at 3.0–4.5 wt% of total dry mix, the upper boundary being governed not by flexural strength but by the fresh mortar viscosity increase that occurs when redispersed polymer interacts with polycarboxylate ether superplasticizer and fine graded silica. At the 4.5 wt% limit, a twin-shaft compulsory mixer with high-shear chopper rotors requires approximately 15–25 seconds additional wet mixing to eliminate polymer-mediated air entrainment; simultaneous defoamer adjustment to 0.10–0.15 wt% of total powder is normally specified in plant-batched formulations. Substrate preparation is shot-blasting to a surface profile of CSP 3–5, and the substrate moisture is held below 2.0% CM before pouring. Machine-applied lines use rotor-stator worm pumps with outputs of 20–40 L/min, maintaining a wet film thickness of 6–15 mm. Terminal products include bonded wear-course overlays for ambient warehouses, loading dock approaches, battery charging zones, and tool-bound circulation aisles in third-party logistics facilities. The operational boundary is clear: when RDP dosage exceeds 4.5 wt%, the wet mix can become shear-thinning and pump-labour time increases, while early strength gain at 6 hours may fall below the 1.0 MPa threshold required for inspection foot traffic.
The following matrix summarises the distinct reference windows used across the six downstream scenarios; these are not interchangeable because the fresh-mix rheology changes with aggregate gradation, pump type, and substrate temperature.
| Downstream application | RDP window (wt% of total dry mix) | Representative EN 13813 classification | Primary test method |
|---|---|---|---|
| Logistics wear course | 3.0–4.5 | CT-C30-F7 | EN 13892-3 |
| Retail and office leveling | 2.0–3.5 | CT-C25-F6 | EN 13892-2 |
| Healthcare cleanroom | 2.5–4.0 | CT-C30-F7 | EN 13892-3 plus ISO 14644-1:2015 |
| Residential renovation | 1.5–2.5 | CT-C20-F6 | EN 13892-2 |
| Underfloor heating | 2.0–3.5 | CT-C25-F7 | EN 13892-2 plus EN 1264-4 |
| Parking deck | 3.0–5.0 | CT-C35-F10 | EN 13892-3 plus ASTM C672/C672M |
At the junction between decorative vinyl and polished concrete, retail and office floor leveling layers are specified for surface regularity and compatibility with moisture-sensitive adhesives rather than for bulk load capacity. These layers are installed at 3–10 mm, which moves the RDP requirement into the 2.0–3.5 wt% range of total dry mix. Below 2.0 wt%, adhesion to power-floated substrates becomes batch-sensitive; above 3.5 wt%, the polymer film can increase surface tack after dry polishing. The relevant EN 13813:2002 class is commonly CT-C25-F6, with flexural strength tested under EN 13892-2. Production uses continuous dry-mix plants with calibrated screw feeders and a pin mixer at the point of installation; the water:powder ratio is held to 0.15–0.18, and the wet mix is agitated under vacuum or deaerated with a pin mixer before pump application. Contractors typically specify a spiked roller pass between 5 and 10 minutes after pouring to remove entrapped air along the interface with the substrate. Terminal products include retail showroom bases under adhered LVT and sheet vinyl, office renovation layers under raised access flooring, and polished concrete wear surfaces in mall corridors. A specific boundary applies in buildings with large glazed fronts: direct solar gain can raise slab surface temperature above 35°C, which shortens flow retention to less than 10 minutes at the upper RDP dosage and requires ice-free water adjustment rather than ad hoc extra water, which would increase shrinkage and crack risk.
Hospital corridor and cleanroom periphery floors combine rolling autoclave loads, broad-area wet cleaning, and the requirement for crack-free monolithic surfaces that do not trap biological soil. The relevant standards are EN 13813:2002 class CT-C30-F7, EN 13892-3 for wear, and cleanroom particle classification under ISO 14644-1:2015; pharmaceutical installations often require compatibility with EU GMP Annex 1 cleaning validation. The RDP addition is held at 2.5–4.0 wt% of total dry mix. The lower boundary is set by the need for film continuity at 48 hours after damp-mop exposure; the upper boundary is constrained by surface hardness retention after repeated exposure to diluted sodium hypochlorite and quaternary ammonium compounds. Production in occupied hospital zones uses mobile continuous mixers with dust extraction and water-batched pump lines; substrate priming is done with epoxy or polyurethane primers at 150–250 g/m², and the primer must be overcoated within 6–24 hours to avoid amide bloom. The self-leveling layer is placed at 4–10 mm and is frequently sealed with a two-component polyurethane or epoxy finish. Terminal products include exposed wear courses in diagnostic imaging corridors, cleanroom changing rooms, pharmaceutical secondary packaging halls, and laboratory preparation areas. A critical limitation is disinfection compatibility: polymer films from RDP are generally resistant to diluted QAC solutions, but hydrogen peroxide vapour at concentrations above 6% or sodium hypochlorite above 5% can induce microcrazing if the wear course is not sealed. Published data for exact hardness loss after repeated vapour-phase hydrogen peroxide cycles in unsealed polymer-modified cementitious surfaces is limited; therefore, the specification should remain with sealed systems in such environments.
Because aggregate interlock falls away in thin residential slabs over acoustic mats, the redispersed polymer phase carries a higher proportion of tensile relief and substrate adhesion than in monolithic industrial pours. For this scenario, RDP is added at 1.5–2.5 wt% of total dry mix to improve crack bridging and adhesion to primed substrates without increasing water demand. The classification is typically EN 13813:2002 CT-C20-F6; impact-sound improvement is controlled by the resilient layer under ISO 10140 test sequences, not by the RDP dosage itself. Production is usually discontinuous on site: a 120–180 L paddle or pan mixer is used with cold water at 5–20°C, and the material is placed with a gauge rake and smoothing trowel. The water:powder ratio is extremely sensitive; a variation of ±0.2% can produce visible segregation lines in renovation pours thinner than 3 mm. Terminal products include apartment subfloors under LVT and laminate, bathroom bases below thin waterproofing membranes, and leveling layers in condominium units before polished concrete. In these thin residential sections, the lower RDP dosage means polymer film formation is more vulnerable to early drying; if slab temperature exceeds 28°C and relative humidity is below 40%, wet curing or polyethylene sheeting is required for at least 24 hours, otherwise edge curl at door thresholds is frequently observed.
In hydronic installations with pipe crown cover below 35 mm, the service condition is not static compression but repeated thermal expansion of the embedded polyethylene pipe loops at 10–40°C. Underfloor heating screeds and thin encapsulated electric heating mats impose those repeated thermal gradients across the wear course; the polymer film must accommodate differential expansion between the pipe crown and the surrounding mortar. In hydronic systems, the relevant product standard is EN 1264-4 for in-situ testing, while the wear course itself is classified under EN 13813:2002 as CT-C25-F7. RDP dosage in this scenario is normally 2.0–3.5 wt% of total dry mix, with the optimum located by thermal cycling rather than by 28-day compressive strength. Above 3.5 wt%, the polymer phase lowers the elastic modulus but may increase creep at continuous operating temperatures near 45°C when heavy stationary furniture bears directly on the screed surface. Production for hydronic floors is usually via continuous mixer-pump lines with pipe-covering thickness of 20–35 mm over the heating pipes; thin electric systems receive 3–6 mm of self-leveling wear course directly above the heating mat. In both cases, deaeration is critical because air bubbles trapped around pipe loops cause local thermal resistance and surface popping. Terminal products include cementitious wear courses over water-based floor heating in residential and light commercial buildings, thin renovation layers over electric heating mats, and monolithic leveling slabs that serve both acoustic separation and heat distribution. A notable boundary is the incompatibility of high-alkali rapid-hardening calcium aluminate cement with some VAE RDP grades in heated slabs; if the binder system is formulated for rapid commissioning, the RDP type must be checked against the cement source and lithium carbonate accelerator content to avoid delayed film formation and surface cracking at pipe joints.
Outside the enclosed building envelope, parking deck wearing courses experience repeated salt spray, wet-dry cycles, and freeze-thaw attack that render interior dosage windows insufficient. The typical specification is EN 13813:2002 CT-C35-F10, with wear resistance under EN 13892-3 and additional scaling resistance assessed under ASTM C672/C672M using a 3 wt% sodium chloride solution. RDP addition is held at 3.0–5.0 wt% of total dry mix; the higher upper limit improves chloride ion diffusion resistance and crack bridging over shrinkage cracks, but it also creates processing constraints because the polymer can stabilise air if mixing water is added too quickly. Substrate preparation uses shot-blasting to CSP 5–7; active leaks are injected and the deck is flood-tested for 24 hours before the cementitious pour. The material is machine-applied by rotor-stator pumps in 6–12 mm single passes, and silica sand is broadcast at 1.5–2.5 kg/m² into the wet surface for slip resistance during ramps. Terminal products include parking ramp wear courses, podium deck toppings, service vehicle aisles in basement garages, and exterior circulation routes. The operational boundary in cold climates is the first winter cycle: RDP-modified wear courses achieve full polymer film strength after 28 days of curing, but early de-icing salt exposure before film coalescence can cause severe surface scaling that is not reversible by later resealing. For exterior decks placed after 1 October in continental climates, protection with temporary impermeable sheeting is mandatory for 14–21 days or until freeze-thaw cycles begin, whichever comes first.
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RDP-CSL 6010 is a vinyl acetate-ethylene copolymer redispersible polymer powder developed for dry-mix cementitious wear-course self-leveling compounds applied in horizontal interior and exterior service conditions. The product designation is used herein as a representative model for an ethylene-vinyl acetate grade with a nominal ethylene content of 18–24 wt% in the polymer phase, a bulk density of 480–620 g/L under DIN EN ISO 60, a residual moisture content of ≤1.0 wt% under ISO 787-2, and an ash content at 1000 °C of 9–13 wt% under ISO 3451-1. The pH of a 10% aqueous redispersion is 6.5–8.5 under ISO 976, and the minimum film formation temperature is 0–4 °C under DIN ISO 2115. The powder is supplied in 25 kg multi-wall paper sacks with polyethylene liners and is stored below 30 °C and 60% relative humidity to preserve redispersibility for 12 months from the production date. In cementitious wear-course self-leveling formulations, the recommended dry-mix dosage is 2.5–5.0 wt% of total dry batch mass, adjusted according to binder chemistry, aggregate grading, application thickness, and required traffic classification.
The lower functional limit is governed by film continuity within the cementitious matrix. At addition levels below 2.0 wt%, the polymer phase remains discontinuous after hydration, and the increase in flexural strength measured by EN 13892-4 is generally less than 15% relative to an unmodified reference. At addition levels above 5.0 wt%, the dry-mix water demand increases, setting is retarded, and 28-day compressive strength can fall below the 30 MPa threshold specified for many wear-course applications under ASTM C109/C109M. The key processing conflict exists between flow and film formation: the ethylene comonomer content that lowers minimum film formation temperature also softens the polymer at elevated service temperatures, producing a risk of thermoplastic surface indentation under point loads when surface temperature exceeds 35 °C. Isothermal conduction calorimetry at 20 °C has shown a hydration peak delay of 30–90 minutes at 4.0 wt% RDP addition, with total heat after 48 hours reduced by 5–12% depending on cement type. This retardation is not automatically a defect, but it shifts the early strength development window and therefore the timing of foot traffic, sealing, and top-coating operations.
Poly(vinyl alcohol)-stabilized RDP powders also contribute to water demand because the protective colloid and any mineral anti-caking residue participate in paste rheology. A powder with ash content of 9–13 wt% can require approximately 0.03–0.05 kg of additional mixing water per kilogram of RDP at constant flow, measured as a 135–145 mm ring flow. In continuous mixing systems, this water demand must be compensated before polymer addition because localized overdosing can produce surface bleed water, polymer flotation, and reduced abrasion resistance. The use of a powder defoamer at 0.1–0.3 wt% of total dry mix is typical for wear-course RDP formulations to reduce air entrainment from the protective colloid and from high-shear redispersion.
On production-scale dry-mix lines, RDP-CSL 6010 is added after the cement and fine aggregate have been pre-blended but before the final high-speed mixer stage. Batch-to-batch variance in bulk density can produce segregation if the powder is pneumatically conveyed over distances above 30 m without back-pressure control. Rotary valve feeding into a twin-shaft ribbon blender with a mixing time of 180–240 seconds at 20–25 rpm provides uniform distribution without excessive heat generation. High-speed pin mixers above 1,500 rpm are not recommended as the sole mixing step because frictional heating can raise the powder temperature above 40 °C and initiate surface tackiness that reduces flowability and increases sieve residue.
Installation of the RDP-modified wear-course self-leveling compound proceeds by machine-applied continuous mixing with a forced-action mortar mixer or continuous pump having a mixing chamber volume of 100–200 L. The dry mortar is mixed with potable water at a water-to-powder ratio of 0.19–0.22 by mass, adjusted to produce a ring flow of 135–150 mm without visible segregation. The mixed material is pumped through a 25–50 mm internal-diameter hose at a discharge rate of 10–25 L/min. At the discharge point, a serrated spreader and porcupine roller are used to release entrained air before surface skin formation. Pot life at 20 °C is 20–35 minutes; at 30 °C, pot life can fall below 10 minutes. Retempering with water after the initial flow loss is not permitted because it lowers surface hardness, increases dusting, and disrupts the polymer film at the wear surface.
Application thickness for wear-course service is typically 6–15 mm under wheeled traffic. Below 4 mm, rapid moisture loss and aggregate bridging produce plastic shrinkage cracking and weak polymer coalescence. Above 25 mm, the exothermic heat of cement hydration can raise the core temperature above 60 °C, accelerating poly(vinyl alcohol) dissolution and forming a surface film before internal hydration is complete. Substrate preparation follows principles aligned with EN 1504-2: mechanically prepared concrete with a minimum tensile pull-off strength of 1.5 MPa when tested according to EN 1542; substrate temperature at least 3 °C above dew point; and moisture content below 4.0% by calcium carbide or gravimetric method before primer application. Where the substrate is non-absorbent, an epoxy or polyurethane primer is applied to provide a bond bridge, and the self-leveling compound is placed wet-on-tacky within the primer’s open time. If the primer is overcoated after its pot life, delamination can occur at the wear-course interface even when the self-leveling mortar itself meets pull-off requirements.
| Parameter | Typical range | Test method |
|---|---|---|
| Bulk density | 480–620 g/L | DIN EN ISO 60 |
| Residual moisture | ≤1.0 wt% | ISO 787-2 |
| Ash content at 1000 °C | 9–13 wt% | ISO 3451-1 |
| pH of 10% redispersion | 6.5–8.5 | ISO 976 |
| Minimum film formation temperature | 0–4 °C | DIN ISO 2115 |
| Sieve residue on 315 µm screen | ≤2.0 wt% | DIN 53195 |
| Recommended dry-mix dosage | 2.5–5.0 wt% | Internal formulation control |
A wear-course self-leveling compound must maintain surface integrity under rolling wheels, impact, and moisture exposure. RDP modification improves the abrasion resistance of cementitious overlays primarily by forming a continuous polymer film that bridges microcracks and reduces surface spalling under concentrated load. In comparative testing of EVA-based RDP in cementitious self-leveling mortars, abrasion resistance measured by the rolling-wheel method of ASTM C779 shows a measurable reduction in mass loss at 4.0 wt% polymer addition relative to an unmodified control. The improvement is more pronounced at early ages, between 7 and 14 days, because the polymer phase contributes to surface toughness before full cement hydration is achieved. Published data for this specific configuration is limited; laboratory trends should be confirmed on a project-specific formulation because aggregate type, surface sealer, and curing regime influence abrasion results more than polymer dosage alone.
Interfacial adhesion to the prepared substrate is evaluated by pull-off testing under EN 1542. Values in the range 1.5–2.5 MPa are generally reported for polymer-modified cementitious wear courses on mechanically prepared concrete. Cohesive failure within the overlay is the preferred failure mode; adhesive failure at the primer or substrate interface indicates inadequate surface preparation or primer incompatibility. After 25 wet-dry cycles, EVA-based RDP retains a higher proportion of original adhesion than cellulose-ether-only modified systems because the polymer film resists water re-entry at the interface. The limitation is that continuous immersion is not recommended for unsealed RDP-modified wear courses, since prolonged water exposure can swell the poly(vinyl alcohol)-stabilized polymer phase and reduce surface hardness.
The difference between RDP-CSL 6010 and alternative polymer modifications is defined by the balance of hardness, flexibility, and dry-mix processability. Acrylic-based RDP grades typically exhibit higher glass transition temperatures in the range of 10–30 °C, which improves film hardness and resistance to plasticizer migration but reduces low-temperature coalescence and flexibility. EVA-based grades with glass transition temperatures between −5 °C and +5 °C form continuous films on substrates at 5–10 °C without coalescing aids, an advantage in unheated industrial buildings. Liquid styrene-butadiene rubber dispersions can provide higher elongation, but they cannot be incorporated into a one-component dry mix and require site dosing with associated batch consistency problems. RDP-CSL 6010 is therefore positioned between high-flexibility SBR systems and high-hardness acrylic systems, with 28-day flexural strength of a 4.0 wt% modified self-leveling mortar typically in the range 9–12 MPa and compressive strength of 35–42 MPa, depending on water-to-powder ratio and cement type.
After placement, the surface is protected from direct sunlight, wind, and frost for 24 hours. Wet curing is not compatible with high RDP dosages above 5.0 wt% because continuous water exposure can redisperse the surface polymer film and create a soft skin. A polyurethane or epoxy sealer is applied after 7 days at residual moisture below 4.0% to lock surface hardness and reduce dusting. Incompatibilities include high levels of calcium sulfoaluminate binders with very rapid setting, which can entrap polymer before coalescence, and excessive use of hydrophobic admixtures such as zinc stearate, which may interfere with film formation at the wear surface. Avoid combination with amine-based additives in primer or sealer systems where residual moisture can support amine migration and surface discoloration. The operational boundary for RDP-CSL 6010 is therefore a dry-mix formulation with moderate binder alkalinity, controlled water-to-powder ratio, and placement within the stated temperature and moisture limits; outside this envelope, surface tackiness, delayed strength gain, or reduced abrasion resistance may occur.
