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Recherchez par type de surface ou par problème pour accéder au guide technique approprié. Des pavés aux bétons en passant par les taches, les algues et les scellants défaillants, suivez le bon système pour une performance à long terme.
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Faut-il enlever l'efflorescence avant d'appliquer un scellant ? Dépôt blanc sur les pavés
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Fleur de scellant : Pourquoi votre allée a blanchi et comment y remédier
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Pour les allées, terrasses et surfaces extérieures
Dépannage pour allées et patios
Guides techniques pour diagnostiquer les problèmes courants de surfaces extérieures et appliquer le système de traitement correct. Couvre les scellants, les taches, la croissance biologique et la dégradation de surface.
Faut-il enlever l'efflorescence avant d'appliquer un scellant ? Dépôt blanc sur les pavés
Fleur de scellant : Pourquoi votre allée a blanchi et comment y remédier
Problèmes courants liés aux surfaces et aux scellants expliqués
Allée et Patio Foire aux questions sur le dépannage
FAQ sur les algues, la mousse et les proliférations biologiques
Les surfaces extérieures sont exposées à l'humidité et à la croissance organique. Les algues, la mousse et les lichens affectent non seulement l'apparence, mais peuvent également créer des risques de glissade et dégrader les scellants.
Pourquoi ma terrasse verdit-elle constamment ?
Les algues et la mousse se développent dans les zones humides et ombragées où l'humidité est retenue. Cela est courant sur les surfaces exposées au nord ou mal drainées.
Comment enlever les algues des pavés ?
Utilisez un biocide ou un produit fongicide adapté pour tuer la croissance à la racine. Le nettoyage sous pression seul n'empêchera pas la repousse.
Why does it come back so quickly?
If spores are not fully killed, regrowth will occur. Ongoing moisture and lack of sunlight accelerate recurrence.
Can I seal over algae?
No. All biological growth must be fully removed and treated before sealing.
Does sealing stop algae growth?
A good sealer can reduce water absorption and slow regrowth, but does not eliminate it entirely.
SEALER FAILURE & PEELING FAQ’s
Sealers can fail due to poor preparation, incorrect product selection or application to damp or contaminated surfaces.
Why is my sealer peeling or flaking?
This is usually caused by applying sealer to a damp surface, contamination, or using the wrong type of sealer for the substrate.
Can I apply sealer over old sealer?
Only if the existing coating is sound and compatible. Otherwise, it must be removed before reapplication.
How do I fix a failed sealer?
Remove all failed material, clean and prepare the surface thoroughly, then reapply the correct sealer system.
Does moisture cause sealer failure?
Yes. Trapped moisture can prevent curing and lead to whitening, peeling or delamination.
Can I just recoat over peeling areas?
No. All failing areas must be removed to ensure proper adhesion of the new system.
WHITENING, BLOOMING & HAZING FAQ’s
White or cloudy patches in sealers are typically caused by trapped moisture or incorrect curing conditions.
Why has my sealer turned white?
This is usually moisture trapped beneath the sealer or within the coating during curing.
Can weather cause sealer whitening?
Yes. Rain, high humidity or cold temperatures during application can cause blooming or hazing.
How do I fix a white or cloudy sealer?
In some cases, reactivation with solvent may help. Severe cases require removal and reapplication.
Can I prevent blooming?
Apply only in dry conditions, on fully dry substrates, and within recommended temperature ranges.
STAINS, OIL & CONTAMINATION FAQ’s
External surfaces are highly exposed to staining from vehicles, organic matter and environmental contaminants.
Will oil stains affect sealing?
Yes. Oil prevents penetration and bonding of sealers, leading to failure.
How do I remove oil from block paving?
Use a strong degreaser and repeat treatment if necessary. Deep stains may require mechanical cleaning.
Can I seal over stained paving?
Only if stains are fully removed or stabilised. Otherwise, they may show through or affect adhesion.
What causes black spots on patios?
Often organic growth or tannin staining from leaves and debris.
Does pressure washing remove all stains?
No. Chemical cleaning is often required for effective stain removal.
COLOUR LOSS & SURFACE WEAR FAQ’s
Exposure to UV, traffic and weathering gradually breaks down surface colour and protective coatings.
Why has my driveway lost its colour?
UV exposure and wear degrade pigments and surface coatings over time.
Can I restore faded paving?
Yes. Colour-enhancing sealers or coatings can restore and protect the surface.
Does sealing improve colour?
Many sealers enhance colour by deepening tones and providing a “wet look” finish.
Why does my surface look patchy?
Uneven absorption, previous coatings or inconsistent preparation can cause patchy appearance.
How often should I reseal a driveway?
Typically every 2–5 years depending on traffic, exposure and sealer type.
The Help & Technical Hub
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The Help & Technical Hub brings together preparation guides, application advice, FAQs, SDS & TDS downloads, and system recommendations to help you choose, apply, and maintain the right coating with confidence.