HQC Stabilising Primer - 5L

A water-based primer specially formulated to seal unstable areas that remain powdery and chalky af...

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Product Information

Full details

This guide is for DIY enthusiasts and professional painters preparing masonry surfaces. The HQC Stabilising Primer's key benefit is its ability to seal powdery and chalky areas, ensuring a stable base for new paint. A minor caveat is the need for surfaces to be sound, clean, and dry before application. This water-based primer is designed to penetrate and bind loose particles on various masonry substrates, creating an ideal surface for HQC Masonry Paints.

All features

Model Part Number5056291312181
BrandHQC

Extended Product Information

FAQs

What is the main purpose of HQC Stabilising Primer?

Its main purpose is to seal and consolidate unstable, powdery, or chalky areas on masonry surfaces that remain after preparation, creating a solid base for painting.

Can I use this primer on damp walls?

No, the surface must be sound, clean, and dry before application for the primer to work effectively and adhere properly.

What types of surfaces can I apply this primer to?

It can be applied to brick, stone, render, concrete, plaster, pebble dash, stucco, existing painted surfaces, and other friable surfaces.

How many coats of primer should I apply?

Typically, one coat is sufficient. However, for extremely powdery or chalky surfaces, a second coat may be necessary after the first has dried.

Does the primer change the color of the surface?

No, the HQC Stabilising Primer is colourless and dries clear, so it will not alter the final color of your masonry paint.

How long does the primer need to dry before painting?

You should allow the primer to dry completely, which usually takes 4-6 hours, but always refer to the specific product instructions for exact drying times.

What kind of paint should I use over this primer?

This primer is specifically formulated for use with HQC Masonry Paints. It is recommended to apply two coats of the selected HQC Masonry Paint for best results.

Troubleshooting

Primer not sealing powdery areas effectively

Ensure the surface was adequately prepared and is completely dry. Very heavy chalking may require more than one application of primer. Check that you are using the correct HQC Masonry Paint as a topcoat.

Primer leaving a sheen or becoming glossy

This primer should dry clear and matte. If a sheen is present, it may indicate incomplete drying or an incompatible surface. Ensure adequate ventilation and drying time.

Brush marks or roller texture visible after drying

Apply the primer evenly, avoiding overworking it. Use a high-quality brush or roller suitable for masonry primers. Ensure smooth, consistent application.

Primer peeling or flaking after application

This usually indicates the underlying surface was not properly prepared (not clean, dry, or sound) or the primer has not bonded correctly. Ensure all loose material was removed before application.

Pros and Cons

Pros

  • Effectively seals powdery and chalky surfaces.
  • Suitable for a broad range of common masonry materials.
  • Improves the adhesion and finish of subsequent paint coats.
  • Water-based for easier cleanup.
  • Dries clear, preventing color alteration.

Cons

  • Requires surfaces to be sound, clean, and dry before application.
  • Does not fill significant cracks or imperfections.
  • Needs adequate drying time before applying topcoats.
  • May require multiple coats on extremely chalky surfaces.
  • Primarily for preparation, not a standalone finish.

Setup, Compatibility & Care

Preparation is Key: Before applying HQC Stabilising Primer, ensure the surface is sound, clean, and dry. Remove any loose debris, dirt, or efflorescence. Thoroughly prepare the area by scraping, brushing, or washing as needed.

Application: Apply one coat of the primer using a brush or roller. Pay particular attention to any remaining powdery or chalky areas. Allow the primer to dry completely according to the manufacturer's instructions (typically 4-6 hours, but check the product label).

Topcoat Application: Once fully dry, apply two coats of your chosen HQC Masonry Paint. Ensure each coat is thoroughly dry before applying the next.

Compatibility: This primer is designed for use on brick, stone, render, concrete, plaster, pebble dash, stucco, existing painted surfaces, and other friable surfaces prior to over-coating with HQC Masonry Paints. It is not intended for use on floors or in areas of constant immersion.

Care: Store the primer in its original container in a cool, dry place, away from direct sunlight and extreme temperatures. Keep the lid tightly sealed when not in use. Clean brushes, rollers, and equipment with water immediately after use.

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