Masterseal® 321B

Masterseal^® 321B is a single component, clear, penetrating water repellent which provides weatherproof protection for vertical surfaces such as clay, brick, sandstone or mineral render. 

Features and Benefits 

• No significant reduction in moisture vapour permeability 
• Long-lasting protection against wind-driven rain 
• Improves the aesthetics of the façade by reducing efflorescence 
• Surface remains unchanged from the designed appearance 
• Water-based; reduces volatile organic emissions into the atmosphere in comparison with today’s commonly used organic-solvent-based repellents 
• Provides a much safer working environment for the applicator by minimising health hazards associated with volatile organic solvents 
• Non flammable 
• Ready for use; no dilution on site means consistent quality 
• Overspray and equipment easily cleaned with soapy water 
• Virtually no product evaporates during spray application, therefore more active repellent can reach its intended target at equal coverage rates 
• Single application only 
• Solvent free