muro san Restoration Plaster WTA - Damp Masonry Treatment (25kg)

muro san Sanierputz WTA weiß (muro san White Restoration Plaster) is a professional-grade white renovation plaster engineered for treating and preserving moisture-damaged masonry in historic and traditional buildings. This pore-hydrophobic and highly diffusion-capable plaster delivers lasting protection for damp walls while maintaining aesthetic appeal with its clean white finish—ideal for historic facades and interior restoration work.

Key Features

• White Finish: Clean, bright white color suitable for heritage facades and period-appropriate aesthetics
• Pore-Hydrophobic: Water-resistant surface prevents liquid water penetration while allowing vapor transmission
• Highly Diffusion-Capable: Exceptional breathability allows trapped moisture to escape naturally from masonry
• WTA Certified: Complies with Wärmeschutz-Technische Analyse standards and DIN 18 557 / DIN 18 550 Mortar Group P II
• Salt-Resistant: Prevents salt efflorescence and plaster spalling on affected masonry
• Historic Building Grade: Formulated for compatibility with traditional building materials and construction methods
• Excellent Workability: Easy application by machine or hand with strong adhesion properties
• Ready-to-Use: Dry mortar formulation—simply add water to correct consistency

Applications

• Permanent plastering of damp, salt-laden masonry on historic buildings
• Renovation and restoration of heritage facades and period properties
• Treatment of moisture-damaged cellars, vaults, and below-grade spaces
• Post-flood remediation and water-damage restoration on traditional buildings
• Surface plaster following horizontal damp-proof course installation
• Prevention of salt crystal growth and efflorescence on heritage structures
• Interior and exterior breathable plaster finish on traditional masonry
• Conservation-approved restoration work on listed buildings and historic properties

Technical Specifications

Standards & Certification: DIN 18 557, DIN 18 550 (Mortar Group P II), WTA approved
Type: Ready-to-use dry mortar - pore-hydrophobic and diffusion-capable
Color: Pure white
Composition: Specially formulated white cement mortar with water-repellent and workability enhancers
Product Code: 02040 / 02043
Package: 25kg sack
Coverage: Approximately 2-2.5 m² per 25kg bag at 10-12mm thickness (varies with application method and substrate)
Application Thickness: First coat 10-15mm; finishing coat 5-10mm
Application Temperature: Minimum 5°C; optimal 15-25°C
Drying Time: Approximately 7-10 days depending on temperature and humidity
Water Addition: 11-13 liters per 25kg bag (mix to desired consistency)
Vapor Permeability: High diffusion capability - allows water vapor to escape freely
Storage: Store in cool, dry conditions; shelf life 12 months in original sealed packaging

Substrate Preparation

• Remove any loose, flaking, or delaminated plaster and damaged masonry facing
• Clean masonry surface thoroughly - remove dust, algae, moss, and contaminants
• Dampen substrate (but not saturated) before application for optimal adhesion
• Ensure adequate substrate salinity assessment before treatment begins
• For optimal results, follow WTA guidelines for comprehensive damp treatment strategy
• Consider installing horizontal damp-proof course before plaster application for rising damp issues
• On listed buildings, consult conservation officer before commencing work

Application Instructions

1. Mix Thoroughly: Add 11-13 liters clean water to 25kg bag. Mix with mechanical mixer or by hand until uniform mortar consistency is achieved. Allow 10-15 minutes rest, then remix before application.
2. Prepare Substrate: Clean and dampen masonry surface. Remove any loose material, previous failed plaster coatings, and debris.
3. Apply First Coat: Apply 10-15mm thickness using trowel or spray application. Work systematically in sections, maintaining consistent edge control.
4. Cure First Coat: Allow 7-10 days drying between coats depending on temperature, humidity, and substrate porosity. Protect from rain during curing.
5. Apply Finish Coat: Apply final 5-10mm layer for smooth, uniform white surface finish. Trowel finish or textured as required.
6. Protection & Finishing: Protect from rain for first 48 hours. Avoid application in frozen conditions or extreme heat. Allow full cure before painting or sealing if required.

Safety & Storage

• Contains white Portland cement - skin and eye irritant. Avoid prolonged contact with skin.
• In case of skin contact, wash thoroughly with water.
• In case of eye contact, rinse immediately with clean water for at least 15 minutes.
• Wear appropriate PPE: gloves, eye protection, dust mask, and protective clothing during mixing and application.
• Use in well-ventilated areas.
• Store in cool, dry conditions (15-25°C). Protect from rain and excessive moisture.
• Keep in original sealed packaging. Once opened, use contents within reasonable timeframe.
• Keep away from children and pets.
• Refer to Safety Data Sheet (Merkblatt 02040/02043) for complete handling information.

Why Choose muro san White Restoration Plaster?

muro san White represents the gold standard in WTA-certified restoration plasters for heritage buildings. Manufactured in Germany to exacting standards, this product is trusted by conservation specialists, historic building contractors, and restoration professionals throughout the UK and Europe. The pure white finish offers heritage-appropriate aesthetics while maintaining the breathable performance essential for traditional masonry preservation. Unlike impermeable modern solutions, muro san White delivers genuine, long-lasting damp protection while allowing walls to dry naturally—preserving the integrity and longevity of historic structures.

Made in Germany | WTA Certified | Heritage Grade | Conservation Approved | Historic Building Specialists Recommend