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A waterproofing additive for incorporation into the backing render coat after installation of a damp proof course. Used in sand: cement renders, it also provides workability so that further admixtures are not required. Used as recommended ensures that hygroscopic salts are prevented from moving to the surface plaster and exhibiting secondary dampness.

Rendermix is not a vapour barrier and so will allow the walls to dry out and breathe naturally.

Dilution: 1:40 Sovereign Rendermix to fresh clean water.

Sovereign Fungicidal Wall Solution Extra is recommended to treat dry rot if present.

General information

5 L

25 L

Uniclass 2015
Waterproofing mortar admixtures (Pr_20_31_03_96)Primary
Specification data - Waterproofing mortar admixtures
Product Reference



5 L

25 L

Standard product features


Liquid concentrate.


Blue viscous liquid.

Third party certifications
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