NZDU00398 Dulux Prep Wash - Product Datasheet - Version 7.0

Sep 28, 2026

Uploaded by jayni

Dulux Prep Wash is a surface preparation concentrate formulated to remove dirt, grease stains, and biological growth such as mould, mildew, and algae from new or old exterior surfaces before applying Dulux paint systems. It whitens stains and grey weathered timber and helps combat common contamination that can affect coating performance. The datasheet specifies mixing (1:1 with water), application by brush or garden sprayer, typical touch-dry time, rinsing and cleanup with water, and key precautions including avoiding contact with powder-coated and non-target coated surfaces.

LanguageEnglish

CategoryHealthcare

FormatPDF

Pages4

Reading Time10 min

AccessFree to download

Introduction

Description and Image

Features and Benefits

Uses

Precautions and Limitations

Typical Properties

Application Methods

Application Guide

Surface Preparation

Application Procedure and Equipment

Health and Safety

Transport and Storage

Disclaimer

NZDU00398 Dulux PREP WASH Introduction Product Code 951-82195 Description and Image Dulux Prep Wash is an essential preparation product designed to obliterate dirt and mould , mildew and algae from new and old exterior surfaces prior to applying paint systems. It is effective in removing mould and other contaminants, cleaning and preparing the surface for coating. It also whitens stains and grey weathered timber. Features and Benefits • Contains mildewcide • Supplied as concentrate • Removes algae etc • Removes dirt and grease stains • Combats mould , mildew and algae • Easy to use • Prepares surfaces for painting | Uses | | --- | | Cleaner that prepares all exterior surfaces for coating. Suitable surfaces: Timber, weatherboards, concrete , roof and other surfaces that are to be repainted. Not suitable to remove coatings.
Do not allow to come into contact with powder coated surfaces. Protect plants, bushes, metal and paint work that is not to be cleaned , with plastic sheets. Rinse off immediately and thoroughly if contact occurs. If contact with glass occurs, rinse thoroughly immediately. DO NOT mix with acids, bleach
products, or other household cleaners. | | | | Precautions and Limitations | | Protect plants, bushes, metal and paint work that is not to be cleaned , with plastic sheets. Rinse off immediately and thoroughly if contact occurs. If contact with glass occurs, rinse thoroughly immediately. DO NOT mix with acids, bleach products, or other household cleaners.
Do not allow to come into contact with powder coated surfaces and other coated surfaces not to be repainted.
Note: Surface may be slippery while wet (roof) . | Version 7.0 of Datasheet NZDU00398 approved on Sunday, 27 February 2022 20:04:38 PM (UTC) Page 1 of 4 | Typical Properties | | | | | --- | --- | --- | --- | | Thinner
Water | | | | | Colour
Pale yellow | | | | | Components
1 | | | | | Mixing Ratio
1:1 with water | | | | | Touch Dry
15-20 Minutes. | | | | | Clean Up
􀀉 Water | | | | | Clean Up Description
Clean up all equipment with water. Do not contaminate storm water with product or product washings. | | | | | Application Methods
􀀧 Brush
Broom Garden sprayer | | | | | Application Conditions
Wet Film Per Coat (microns)
Dry Film Per Coat (microns)
Recoat Time (min/hours)
Theoretical Spread Rate (m²/L) | Min
| | | Version 7.0 of Datasheet NZDU00398 approved on Sunday, 27 February 2022 20:04:38 PM (UTC) Page 2 of 4 | Application Guide | | --- | | Surface Preparation
Remove any extreme caked dirt/mud with a waterblaster before using Dulux Prep Wash.
Test on a small inconspicuous area at recommended dilution to determine effectiveness and strength required.
Note: Wear protective gloves and goggles when using this product. Dulux Prep Wash is not a paint remover; however it may remove some old and weathered coatings. This product may not be able to remove hard water deposits, mould or mildew from old grout or silicone caulking.
Precaution: Protect plants, bushes, metal and paint work that is not to be cleaned , with plastic sheets. Rinse off immediately and thoroughly if contact occurs. If contact with glass occurs, rinse thoroughly immediately. DO NOT mix with acids, bleach products, or other household cleaners. | | Application Procedure and Equipment
Apply by broom or brush. Or by garden sprayer.
1 . Add one part Dulux Prep Wash concentrate to one part water in a clean plastic bucket and mix well.
2. Test on a small inconspicuous area at recommended dilution to determine effectiveness and strength required.
3. Apply diluted Dulux Prep Wash solution to walls/roof/trim with a broom/brush or garden sprayer. Leave the solution on the surface until mould and mildew stains disappear or soften (approximately 10 minutes) , avoiding allowing the solution to dry out. Scrub vigorously.
4. Rinse off the surface with water using a

FAQs

What surfaces is Dulux Prep Wash suitable for before painting?

It prepares exterior surfaces for coating, including timber, weatherboards, concrete, roof, and other areas to be repainted. It is not suitable for removing coatings.

How should Dulux Prep Wash be mixed and applied?

Mix one part concentrate with one part water. Apply the diluted solution using a broom/brush or a garden sprayer, leave it until mould and mildew stains disappear or soften (about 10 minutes), then scrub vigorously and rinse thoroughly.

What precautions must be taken when using Dulux Prep Wash?

Protect plants, bushes, metal, and paint work not to be cleaned with plastic sheets, rinse immediately if contact occurs (including glass), and do not mix with acids, bleach products, or other household cleaners. Do not allow contact with powder-coated surfaces and other coated surfaces not intended for repainting.

Sep 28, 2026

Uploaded by jayni