Weiss CSR Extra Mortar stein Remover 5ltr

The weiss CSR Extra is a professional-strength paving cleaner specifically formulated to remove cement residue, mortar haze and polymer-modified grout stains from acid-resistant paving surfaces. Ideal for cleaning newly installed paving, it effectively removes stubborn residues left behind after installation, helping to restore the natural appearance of porcelain, clay paving, brickwork and masonry.

Unlike standard cement removers, CSR Extra has been specially developed to tackle difficult-to-remove polymer-modified mortars, calcium aluminate products and hybrid grouts, making it an excellent choice for modern paving installations. It also helps remove efflorescence and inhibits the formation of rust stains on treated surfaces.

Product Details

• Brand: weiss by Steintec
• Product: CSR Extra
• Pack Size: 5 Litres
• Product Type: Cement & Mortar Residue Remover
• Coverage: Approximately 10–15m² per 5L, depending on the level of contamination
• Suitable For:
  • Porcelain paving
  • Clay paving
  • Acid-resistant natural stone
  • Brickwork
  • Masonry

Key Features

• Removes cement residue and mortar haze
• Effective on polymer-modified mortars and hybrid grouts
• Helps remove efflorescence from paving and masonry
• Inhibits rust formation on treated surfaces
• Suitable for professional and domestic use
• Can be used neat or diluted up to 1:20 depending on the surface
• Fast and effective application
• Ideal for post-installation paving clean-up

Why Choose weiss CSR Extra?

Following the installation of paving, cement residue and mortar haze can often remain on the surface, particularly when using modern polymer-modified installation products. weiss CSR Extra has been specifically formulated to break down these stubborn residues without excessive scrubbing, helping to leave paving looking clean and professionally finished.

It is particularly effective on porcelain paving, where cement films can be more noticeable, and is equally suitable for clay paving, brickwork and other acid-resistant materials.

Installation Guidance

For the best results:

• Only apply when surface temperatures are above 5°C.
• Apply neat or dilute with clean cold water (up to 1:20) depending on the severity of the staining and the sensitivity of the surface.
• Brush vigorously until the residue has been removed.
• Do not allow the product to dry on the paving surface.
• Thoroughly rinse the area with plenty of clean water.
• Follow with a pH-neutral cleaner, such as weiss Pave Clean Pro, to remove any remaining acidic residue.
• Repeat the process if required.

Important Information

• Suitable for acid-resistant surfaces only.
• Use with caution on sandstone, limestone, marble and precast concrete, as acidic cleaners may affect the appearance of these materials.
• Always test on a small, inconspicuous area before full application.
• Wear suitable protective clothing, gloves and eye protection during use.

Why Buy From Paving Central

• Fast UK nationwide delivery
• Professional paving care products trusted by landscapers
• Competitive pricing on leading installation and maintenance products
• Expert advice backed by over 15 years' experience supplying paving materials
• Friendly support for homeowners and trade professionals

Technical Specifications