In a nutshell: Acrylic, hybrid, and silicate deep primers can usually be distinguished by the primer packaging, the substrate, or a simple water test. The distinction directly determines which HATOCH remover works: pH7 Stick for acrylic/hybrid, SPEZIAL for all types including silicate.
→ Directly to the right product: HATOCH pH7 Stick 50ml or HATOCH SPEZIAL 500ml.
Identifying Acrylic Primer
Acrylic primer is the most common primer for interiors, usually milky-white when applied and transparent to slightly glossy after drying. Typically used on absorbent substrates such as plasterboard, plaster, or screed.
Identifying Hybrid Primer
Hybrid primer combines acrylic with other binders for better adhesion on difficult substrates. Visually, it is often hard to distinguish from pure acrylic primer – a look at the data sheet or the product packaging of the primer helps.
Identifying Silicate Primer
Silicate primer is mainly used on mineral substrates (e.g., with silicate paints or on natural stone) and forms a chemical bond with the substrate, rather than just adhering superficially. This makes it significantly more stubborn to remove.
Why the Distinction Matters
The HATOCH pH7 Stick (50ml, pH-neutral) reliably works on acrylic and hybrid primers. For silicate or mineral primers – or if you are unsure – the SPEZIAL 500ml variant (citric acid-based, pH 2–4) is the right choice, as it covers all primer types.
Further Reading
- SPEZIAL 500ml or pH7 Stick: Which product do I need?
- Removing Deep Primer from Tiles, Parquet, and Natural Stone
- Safety Data Sheet Explained Simply
Frequently Asked Questions (FAQ)
How do I know which deep primer I have?
Most reliably through the product packaging or data sheet of the primer used. Without this information, a careful test in an inconspicuous area often helps.
What do I do if I don't know the primer type?
In this case, the HATOCH SPEZIAL 500ml variant is recommended, as it covers acrylic/hybrid as well as silicate and mineral primers.
Is silicate primer harder to remove than acrylic primer?
Yes. Silicate primer forms a chemical bond with the substrate, while acrylic and hybrid primers adhere more superficially – this makes silicate primer more stubborn.