Exterior Wall Shield by Pak Waterproofing
Full Guide to Features, Coverage & Application

Introduction

If you’re repainting the outside of your home or a commercial building, the paint you choose has
to survive sun, rain, humidity, and years of weather cycling without cracking, fading, or growing
algae. Exterior Wall Shield by Pak Waterproofing is a 100% acrylic emulsion built specifically for that job. It’s designed for exterior masonry surfaces brick, plaster, and cement render whether they’re bare or already painted. This guide breaks down what the product offers, how it performs, and how to prepare and apply it for the best results.

What Is Exterior Wall Shield by Pak Waterproofing?

Exterior Wall Shield is a premium, water-based acrylic emulsion made for exterior walls. It’s
formulated to hold up against the kind of everyday environmental stress that outdoor surfaces
face humidity, mild airborne chemical exposure, and moisture from cement or fresh mortar. It
comes in 4-litre and 16-litre packs, with a full range of shades available on the Pak
Waterproofing shade card.

Key Features and Benefits-Exterior Wall Shield by

Pak Waterproofing

Exterior Wall Shield isn’t just a basic exterior coat it’s built with several protective properties
working together:
● Algae and Fungus Resistance – helps resist the growth of algae, mould, and fungus
on the painted surface
● Dirt Resistance – helps the surface stay cleaner for longer by resisting dirt pickup
● Alkali Resistance – protects against alkalinity commonly found in new cement and
masonry
● UV Resistance – helps the finish resist fading and degradation from sun exposure
● Peel Resistance – supports better adhesion and reduces the risk of peeling over time

● Low odour, low VOC formulation – more comfortable to apply, and better for indoor air
quality when working near occupied spaces
● No added lead or mercury
It also offers resistance to mild chemical fume attack and salts that can come from new mortar
or cement rendering, plus resistance to the humidity levels typical of exterior environments.

Technical Specifications
Property Detail

Type 100% acrylic-based emulsion
Recommended Use New or previously painted exterior masonry (brick, plaster, cement render)
Pack Sizes 4 Litres, 16 Litres
Pigment Lightfast, non-lead pigments
Binder Acrylic copolymer emulsion
Solvent Water
Application Methods Brush or roller

Note: Actual coverage will vary with the roughness and porosity of the wall rougher or more
porous surfaces need more paint per coat. Ask Pak Waterproofing for confirmed volume solids,
film thickness, drying/recoat time, and coverage rate (m2/litre) for Exterior Wall Shield so these
can be added accurately.

Surface Preparation: Getting

It Right Before You Paint

Good prep is what makes an exterior paint job last. Here’s the process:
1. Clean the surface – New surfaces need to be clean, dry, and free of dirt, grease, wax,
and any loose or poorly adhering material.
2. Treat biological growth – Any area affected by mould, lichen, algae, or moss should be
treated with a suitable anti-fungal pre-treatment before painting.
3. Prep previously painted walls – Rub down old painted surfaces with a suitable
abrasive paper, then remove all dust.
4. Repair defects – Fill small imperfections with a sand-based filler; use a cement mix for
larger holes and cracks. Allow full drying time afterward.

5. Seal chalky or powdery surfaces – If the wall still feels powdery, friable, or chalky after
prep, seal it first with a suitable exterior crack-bridging primer.
Important: Don’t apply Exterior Wall Shield in wet weather moisture during application and
drying can compromise the finish.

Application Guide-Exterior

Wall Shield by Pak Waterproofing

Exterior Wall Shield can be applied by brush or roller. (Thinning ratios depend on the product’s
actual formulation confirm the correct water-to-paint ratio for brush sealing coats, brush
topcoats, and roller application with Pak Waterproofing before publishing this guide.)
Cleanup: Wash all tools and equipment with water immediately after use, since this is a
water-based formula.

Recommended Painting System by Surface Type

The number of coats and whether you need a primer depends on the condition of the wall:
Surface Type                                                                Recommended System
New or bare surfaces                                                 1 coat exterior crack-bridging primer, then 3–4 coats of Exterior Wall Shield

New/bare surfaces (extra
smooth finish desired)

1 coat crack-bridging primer + 1–2 coats                                                                                                           exterior acrylic filler + 1
coat crack-bridging primer,

then 3–4 coats of Exterior Wall
Shield

Powdery surfaces 1 coat exterior crack-                                                                                                            bridging primer, then 3–4 coats of Exterior

Wall Shield

Normal, sound,
previously painted
surfaces

No primer strictly required, though priming will improve topcoat
performance; then 3–4 coats of Exterior Wall Shield

Safety, Health & Environmental Guidelines

Because this is a chemical coating product, a few precautions matter:
● If sanding or burning off old paint, hazardous dust or fumes can be released — use wet
sanding where possible and work in well-ventilated areas with proper PPE.
● Wear eye and hand protection, avoid breathing in vapours or spray, and only use the
product in well-ventilated spaces.

● Wipe excess paint from brushes and rollers before cleaning to avoid unnecessary
environmental release; collect any spillage rather than letting it reach drains or
waterways.
● Store in a cool, shaded location with the container upright and tightly sealed.
● If it contacts eyes, rinse immediately with plenty of water and seek medical advice; for
skin contact, wash with soap and water (avoid solvents or thinners).
Note: Hazard classification, weight/handling warnings, and any allergy statements should reflect
Exterior Wall Shield’s actual safety data sheet — confirm with Pak Waterproofing before
publishing.

Frequently Asked Questions

Exterior Wall Shield by Pak Waterproofing

How many coats of Exterior Wall Shield do I need?
Most systems call for 3–4 topcoats, plus a primer coat if the surface is new, bare, or powdery.
Can I use Exterior Wall Shield on a rainy day?
No, it shouldn’t be applied during wet weather, as this can affect drying and film quality.
Does Exterior Wall Shield need a primer?
It depends on the surface. New, bare, or powdery surfaces need a primer coat. Sound,
previously painted walls don’t strictly require one, but priming still improves how the topcoat
performs.
How much area does one litre cover?
Coverage depends on the roughness and porosity of the wall confirm the tested coverage rate
(m2/litre/coat) for Exterior Wall Shield with Pak Waterproofing.
Final Thoughts
Exterior Wall Shield by Pak Waterproofing is built around one core job: keeping exterior masonry protected and
looking good through years of sun, rain, and humidity. Its combination of algae/fungus
resistance, UV resistance, dirt resistance, and alkali resistance makes it a solid choice for
exterior brick, plaster, and cement render as long as surface prep and application steps are
followed carefully.