PRODUCT CATEGORIES

RENDERS BASECOATS & ADHESIVES PRIMERS PAINTS THE LIME RANGE MESH BUILDING MATERIALS

PRO-510 Insulating Undercoat

Product Overview

PRO-510 Insulated Undercoat is a lightweight insulating undercoat designed for internal wall applications where improved thermal performance and a stable surface for plaster finishes are required. Formulated with hydrated lime, Portland cement, mineral fillers and perlite, it creates a breathable, durable layer that helps improve the thermal efficiency of internal walls while providing a reliable background for subsequent plaster finishes.

Intended Uses

PRO-510 Insulated Undercoat is designed for internal application on dense mineral substrates, including blockwork, masonry, stone and concrete. It is particularly suitable for refurbishment projects where internal walls require both thermal improvement and surface preparation prior to plastering. The undercoat can be applied in multiple layers to build thickness, helping to level uneven substrates while enhancing thermal performance before the application of finishing plasters.
SPRAY OR
HAND APPLIED
VAPOUR-
PERMEABLE
ACOUSTIC
PROPERTIES
0.071 W/mK Declared
Thermal Conductivity

Data Sheets

Product Data Sheet

Safety Data Sheet

Install Video Guide

VIDEO COMING SOON

Application Conditions

Substrates must be sound, clean and free from dust, loose material or contaminants prior to application. High-suction backgrounds should be primed with EWI-301 Water Based Primer, while smooth or low-absorbency surfaces may require PRO-313 Green Internal Grit to improve adhesion. The dry mix should be combined with approximately 14 litres of clean water per 25 kg bag and mixed mechanically until a homogeneous consistency is achieved. The undercoat can be applied using a hawk and trowel or suitable spray equipment in layers between 20–120 mm, with each layer applied up to a maximum thickness of 30 mm. Application should be carried out in temperatures between 5°C and 25°C, protecting freshly applied material from rapid drying during curing.