VINNAPAS 4042 H 25/1 (WATER REPELLENT)

VINNAPAS 4042 H 25/1 is a dispersion polymer powder with moderately hydrophobic properties, specifically formulated for dry-mix mortars. It is an ideal binder, especially for External Thermal Insulation Composite Systems (ETICS) and waterproofing membranes. This product, a highly flexible copolymer of vinyl acetate and ethylene, imparts permanent water repellency to mortars in addition to fundamental adhesion and flexibility properties.

Key Features and Benefits

• High Flexibility: Provides superior flexibility and deformation capability to mortars thanks to its high ethylene content and consequently low glass transition temperature (Tg).
• Hydrophobic Effect: Ensures water repellency in the hardened mortar structure and reduces water absorption. It does not negatively affect water vapor permeability while doing so.
• Excellent Adhesion: Significantly increases the adhesion strength and abrasion resistance of cured mortars to different surfaces.
• Workability: Improves the consistency and workability of the mortar when mixed with inorganic binders.
• Neutral Rheology: The product has no effect on rheology and exhibits defoaming properties.

Application Areas

VINNAPAS 4042 H 25/1 is particularly used in the following construction chemical applications requiring water resistance and flexibility:

• Adhesive and base coat mortars for External Thermal Insulation Composite Systems (ETICS)
• Mineral-based renders and coatings
• Single-component cementitious waterproofing membranes

Technical Specifications

Processing and Storage

Mixing: In the production of ready-mix dry mortars, VINNAPAS 4042 H 25/1 should be mixed with other dry components in suitable equipment. Excessive temperature increase during mixing can lead to clumping due to the product's thermoplastic nature. Mechanical mixers are recommended when preparing mortar; if mixing by hand, it is advisable to let the fresh mortar rest (slake) for 5 minutes and then re-mix.

Storage: The product is sensitive to moisture and pressure. Storage at temperatures above 30 °C, in humid environments, or under pressure can cause blocking (clumping). It should be stored in a cool and dry warehouse and consumed within 6 months of receipt.