High‑Performance External Render for Trade & DIY

Parex Monorex GM is a professional‑grade, through‑coloured render for vertical masonry and concrete. The one‑coat system delivers a durable, breathable, colour‑consistent finish with no need for painting. Ideal for new builds, extensions, and refurbishments, it offers multiple textures (scraped, spray-textured, smoothed) and a full range of colours to suit both traditional and contemporary designs.

Key Features & Benefits

• Through‑coloured — colour runs through the render; no painting required
• One‑coat application — saves time and labour
• Weather‑resistant & breathable — built for UK conditions
• Hand or machine applied — suitable for diesel/electric spray machines
• Versatile finishes — scraped, spray‑textured (tyrolean to roughcast), or smoothed
• Granulometry — 0–2.5 mm (finish dependent)
• Certifications — EN 998‑1 (OC CS II / W2), Reaction to Fire: A1, BBA Certificate No. 21/5888

Use Cases

• Exterior walls on houses, extensions, garages, and garden rooms
• Refurbishment of tired or failed render
• New build facades needing a quick, long‑lasting decorative finish
• Commercial and residential projects requiring reliable, colour‑consistent results
  
  

Technical & Product Details
 

Substrate Compatibility & Prep

• Suitable on sound, clean blockwork, brick, masonry and cast concrete
• Highly porous backgrounds may require a suction‑control/bonding primer (e.g. Parex Micro Gobetis 3000 or equivalent)
• Not for gypsum‑based backgrounds or previously painted/sealed substrates unless correctly treated

Application Conditions

• Apply between +5 °C and +30 °C
• Avoid direct sun, rain, high winds and frost
• Do not apply to frozen/damp substrates or when frost is expected within 24 hours
• For high‑exposure/coastal areas, use increased thickness as per the application guide
• For consistent colour across elevations, use the same batch number where possible

Supporting Resources

• Technical Data Sheet (Sika)
• Manufacturer Product Page
• NSAI Agrément (Ireland)
• BBA Certificate No. 21/5888 (see approvals on Sika page)

Always follow the manufacturer’s guidance on preparation, mixing and curing. Test a small area if in doubt.