Walther Strong H2O Interior/Exterior Liquid Masking Tape

The H2O Liquid Mask is a specialized 2-in-1 product that functions as both a primer and a peelable liquid mask. This innovative solution is particularly popular among professional painters and decorators for its efficiency and ability to produce clean, sharp lines on windows and doors.

H2O Liquid Mask is a water-based, high-solids coating that is white when applied but dries to a transparent film. It is designed to be a quick and effective alternative to traditional masking tape, especially on surfaces with intricate details or a large number of panes, like French doors. The dual-purpose nature of the product means it can prime a porous surface while simultaneously protecting an adjacent non-porous one, such as glass. 

Please Note: H2O Liquid Mask can only be peeled off smooth, non-grainy surfaces such as glass and uPVC.

Key Features and Benefits

• Dual-Purpose Formula (Prime & Mask): This is one of the most significant advantages of H2O Liquid Mask. It acts as an excellent primer for bare wood and other porous surfaces, while also creating a peelable mask on non-porous surfaces like glass. This eliminates the need for separate priming and masking steps.
• Time-Saving Application: The product can be applied with a brush, roller, or sprayer, making it a very quick and efficient method for covering large or complex areas. This saves considerable time compared to the painstaking process of cutting and applying traditional tape.
• Easy, Clean Removal: Once the paint has dried, the H2O Liquid Mask film can be easily peeled away in a single piece, leaving no sticky residue or damage to the protected surface.
• High-Precision Finish: The liquid form allows it to conform perfectly to the contours of the surface, ensuring a crisp, professional-looking finish with a perfect, bleed-free edge.
• Versatile and Durable: It's suitable for both interior and exterior use and is compatible with a wide range of paints, including 2K paints. It can also be used as a primer over knots in timber, provided the wood has been properly sanded. The film is resistant to water splash but prolonged contact may soften the product.
• Low VOC and Low Odor: As a water-based product, it has a low VOC content, making it a safer and more pleasant option to use in various environments.
• Professional and DIY-Friendly: Its ease of application and clean removal make it a go-to product for professionals seeking to improve efficiency, as well as for DIY enthusiasts who want to achieve a high-quality finish without the frustration of traditional masking.

Application Instructions

1. Surface Preparation: The surface must be clean, dry, and free of dust or grease. Ensure any wood has been sanded down.
2. Application: Stir the product thoroughly before use. Apply a generous, even coat with a synthetic bristle brush, a long-nap roller, or an airless sprayer. For optimal results and easy removal, it's recommended to apply two thick coats.
3. Drying: The liquid will appear white when wet and will dry to a clear, transparent film. The minimum drying time is typically 30-60 minutes, with a recoat time of about one hour. A full cure takes around 24 hours.
4. Painting: Once the H2O Liquid Mask is fully cured and clear, you can proceed with painting the adjacent surfaces.
5. Removal: When the paint is touch-dry, use a sharp knife to score along the edge of the film to ensure a clean break. Then, simply peel the film away from the surface.

Ideal Uses

• Windows and Doors: Perfect for masking glass panes, frames, and intricate details on windows and doors.
• Glazed Timber Doors: The product's dual-purpose nature makes it ideal for this application, as it can prime the timber while masking the glass simultaneously.