EWI-745 Insulating Cork Render

Product Overview

EWI-745 Insulating Cork Render is a sprayable lime and cork thermal insulation mortar designed for improving thermal performance on both horizontal and vertical elements. Its compatibility with spray machines makes it particularly well-suited to complex or uniquely shaped architectural details where rigid insulation boards may be impractical. Suitable for internal and external use, it provides a breathable, natural insulation solution while contributing to a uniform finished surface.

Intended Uses

EWI-745 is suitable for application onto a range of mineral substrates, including ceramics, thermo-clay, brickwork, lime mortars and concrete blocks. It is not recommended for use on OSB panels. For insulation thicknesses greater than 80 mm, rigid insulation systems should be used instead. The product is suitable for both interior and exterior applications.
SPRAY OR
HAND APPLIED
HIGHLY
BREATHABLE
λ-value:
0.055 W/mK
COVERAGE RATE:
2.6 KG/M² PER CM

Data Sheets

Product Data Sheet

Safety Data Sheet

Install Video Guide

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Application Conditions

Substrates must be solid, dry and free from previous plaster, microorganisms, gypsum, cement or any other material that may impair adhesion. The substrate should be lightly dampened prior to application to promote good adhesion, proper curing, and to prevent dehydration and cracking. On older or uneven substrates, a levelling parge coat is recommended to achieve a uniform background.

EWI-745 is supplied as a 10 kg dry mix and should be mixed with approximately 4.5 litres of clean water per bag. Mix for 3–5 minutes until a homogeneous consistency is achieved. Once mixed, the material remains workable for approximately 60 minutes.

When spray applied, the mortar should be applied evenly in layers between 10 mm and 30 mm thick. For thicknesses above 30 mm, multiple layers should be applied before the previous layer has fully hardened. When applied by trowel, layers should be limited to a maximum thickness of 10–15 mm, with additional layers built up as required using the same approach.