Redispersible Polymer Powders (RDP) serve as critical organic binders that define the mechanical performance, workability, adhesion and durability of modern dry-mix mortars. Wacker VINNAPAS® N-series VAE grades share a defining technical trait: rheological neutrality. Unlike conventional RDP that shifts thixotropy, flow or water retention, these grades deliver targeted adhesion and flexibility while leaving the mortar’s base rheology largely unchanged. This characteristic unlocks exceptional formulation freedom for mortar chemists, enabling predictable co-formulation with water-retention agents, superplasticisers, air-entrainers and other functional additives.
The five core grades covered in this guide are VINNAPAS® 4018 N, 4023 N, 5010 N, 5043 N and 5044 N. Engineered along a gradient from rigid to ultra-flexible VAE copolymers, they cover tile adhesives, gypsum skim coats, renders, ETICS, concrete repair and cementitious waterproofing systems. All grades are manufactured plasticizer-free, solvent-free and low-VOC, supporting green building specifications and strict indoor emission requirements. VINNAPAS® eco variants with mass-balance bio-based feedstock are also available for carbon-conscious formulations, with identical technical performance to their standard counterparts.
VINNAPAS® 4018 N
VINNAPAS® 4018 N is a rigid VAE copolymer RDP, purpose-optimized for cement-based tile adhesive formulations. Its harder polymer backbone delivers high cohesive strength, tensile adhesion and abrasion resistance after film formation, making it the baseline grade for standard and medium-duty tile adhesives. The rigid polymer matrix helps cured tile adhesive resist compressive loads and shear stress while maintaining stable bond strength under humid interior conditions.
As an N-series grade, 4018 N does not interfere with mortar rheology. Formulators can independently tune open time, slip resistance and sagging behaviour with separate additives without fighting unpredictable rheology drift. The grade is formulated without plasticizers, film-forming aids or organic solvents, supporting low-emission tile adhesive systems for kitchens, bathrooms and interior flooring projects.
Primary applications: C1 / C2 tile adhesives, interior cementitious tile mortars, grout and rigid repair fillers where high cohesion is prioritized over extreme flexibility. Key selection rationale: Choose 4018 N when your specification targets high early and final cohesive strength, low VOC and stable tile slip resistance for standard-format ceramic tile installation.
VINNAPAS® 4023 N
VINNAPAS® 4023 N is a semi-flexible VAE RDP positioned as a true multi-purpose workhorse across dry-mix segments. It balances adhesion strength and moderate deformability, delivering reliable bonding to both mineral substrates such as concrete, masonry and cement boards, plus selected organic substrates. Its balanced flexibility allows mortar to accommodate minor substrate movement without brittle cracking, while retaining sufficient hardness for wear-facing applications.
Thanks to neutral rheology, 4023 N integrates smoothly into render, repair and tile adhesive formulations. It improves flexural strength, abrasion resistance and trowelability without disrupting pre-set flow and thixotropy profiles. It is widely selected for general-purpose exterior renders and repair mortars where the formulation needs to resist mild thermal cycling.
Primary applications: Multi-purpose tile adhesives, exterior mineral renders, concrete repair mortars, levelling screeds and thin-bed renovation mortars. Key selection rationale: Select 4023 N for generalist formulations that require balanced adhesion and flexibility across mixed substrates, when you want one grade to serve multiple production lines.
VINNAPAS® 5010 N
VINNAPAS® 5010 N is a hard-grade VAE RDP optimized for excellent tensile adhesion on inorganic mineral substrates, with optimized workability for both cementitious and gypsum-based systems. It is widely adopted as a universal binder for skim coats, plastering mortars and tile adhesives, where consistent spreadability and a smooth finished surface are required.
Compared to 4018 N, 5010 N is tuned specifically for gypsum matrices. It enhances the interface bond between gypsum plaster and masonry, reduces surface chalking and improves sanding characteristics of cured skim coats. In cement tile adhesives, it delivers stable open time and clean post-installation wash-off. Its neutral rheology keeps gypsum set control and cement hydration behaviour predictable.
Primary applications: Gypsum skim coats and gypsum plasters, cement tile adhesives, interior levelling compounds and decorative mineral renders. Key selection rationale: Choose 5010 N if your portfolio includes a high volume of gypsum-based mortars, or you need a hard, mineral-adhesive grade for interior plaster and skim coat production.
VINNAPAS® 5043 N
VINNAPAS® 5043 N is a high-flexibility VAE RDP designed for high-performance ETICS base coats and reinforced render systems. It has a high ethylene content, resulting in a low glass transition temperature; the polymer film remains flexible at low ambient temperatures and delivers outstanding crack-bridging capacity under thermal cycling stress, the core failure mode for external insulation systems.
Formulations modified with 5043 N develop high impact resistance and can bridge fine and medium microcracks induced by temperature swing, moisture movement and substrate shrinkage. It forms a continuous elastic network within the cement render matrix to prevent crack propagation through the reinforcing mesh layer. Like all N-series grades, it does not alter thixotropy or water retention, so ETICS formulators can independently adjust application thickness and anti-sag performance.
Primary applications: Premium ETICS base coat / reinforced render, exterior flexible facade mortars, high-impact insulation systems. Key selection rationale: Select 5043 N for high-specification ETICS projects requiring certified crack-bridging and cold-climate construction stability.
VINNAPAS® 5044 N
VINNAPAS® 5044 N is Wacker’s ultra-flexible VAE N-series grade, engineered for demanding applications requiring exceptional low-temperature elasticity and strong adhesion to organic substrates such as EPS insulation boards. It features an ultra-low Tg below freezing point, maintaining polymer film elasticity even under cold weather exposure, and offers the widest deformation range in this portfolio.
Beyond ETICS adhesive and base coats, 5044 N is the preferred grade for single-component cementitious waterproofing mortars and structural repair mortars subject to dynamic movement. Its elastic film can bridge wider cracks and absorb movement stress that would fracture harder polymer systems. It delivers robust adhesion to EPS, XPS and aged concrete, reducing delamination risk at organic-inorganic interfaces.
Primary applications: ETICS insulation board adhesive, flexible cementitious waterproofing mortars, movement-tolerant concrete repair mortars, renovation mortars over organic insulation substrates. Key selection rationale: Choose 5044 N when your formulation must bond reliably to foam insulation boards or meet high-class crack-bridging requirements for waterproofing and restoration mortars.
Formulation Guidance & Selection Matrix Summary
The VINNAPAS® N-series forms a clear performance gradient for systematic selection:
- Rigid strength priority: 4018 N for tile adhesive cohesion
- Balanced multi-purpose: 4023 N for renders, repair and general tile adhesive
- Gypsum & mineral substrate focus: 5010 N for skim coats and plaster
- High-flex ETICS anti-crack: 5043 N for reinforced base coats
- Ultra-flexible, organic-substrate bonding: 5044 N for waterproofing and EPS bonding
The neutral rheology shared by all five grades is the common advantage for formulators: the polymer binder can be changed or dosed up and down without rewriting the entire additive package. This simplifies product upgrade, batch validation and cross-grade substitution within a mortar factory. While each grade is designed for standalone use, controlled co-blending between grades is also practised to tailor intermediate flexibility, for example blending 4023 N and 5043 N for mid-performance ETICS renders.
Closing
For dry-mix manufacturers building a rational binder library, Wacker VINNAPAS® N-series delivers a cohesive family of VAE RDP covering interior tile work, gypsum finishing, exterior rendering, ETICS, waterproofing and concrete repair. The predictable neutral rheology, low-VOC profile and consistent batch quality reduce formulation risk and support compliance with global dry mortar standards and green building schemes. Matching the correct grade to the mechanical stress, substrate type and climate exposure of each mortar system is the foundation of reliable, long-lasting construction performance.
