Coovar Acid Etch Solution - 5 Litre
Not Available
Not Available
Currently unavailable
Currently out of stock
This product is not available at the moment. Check back later or explore other options below.
Product Information
Full details
The Coovar Acid Etch Solution (5 Litre) is designed for DIY enthusiasts and professionals preparing concrete or mortared surfaces and pools for painting. Its primary benefit is creating a 'key' for superior paint adhesion on smooth surfaces by cleaning and etching away laitance and salts. A key consideration is its acidic nature, requiring careful handling and appropriate safety measures.
All features
| Model Part Number | 5 Litre |
|---|---|
| Brand | Coo-Var |
Extended Product Information
FAQs
What is 'laitance' and why is it important to remove?
Laitance is a weak, powdery layer of cement and fine particles that forms on the surface of fresh concrete, especially if over-watered or overworked. It provides a very poor base for paint adhesion, so removing it is crucial for a durable finish.
Can I use this on my patio?
Yes, if your patio is made of concrete or mortar and you are preparing it for a new coating or stain. Always test in an inconspicuous area first.
How do I know if the surface is properly etched?
A properly etched surface will feel slightly rough to the touch, similar to medium-grit sandpaper. It should no longer feel slick or smooth like glass.
What safety precautions are absolutely necessary?
You must wear chemical-resistant gloves, eye protection (goggles or face shield), and protective clothing. Ensure the area is well-ventilated. Never mix with other chemicals.
Can I use a plastic watering can for mixing and application?
Yes, a plastic watering can or bucket is suitable for mixing and applying the diluted solution. Ensure it is made of acid-resistant plastic.
How long should I wait before painting after using the Acid Etch?
The surface must be completely dry before painting. Allow adequate drying time, which can vary depending on weather conditions. Typically, 24-48 hours of dry weather is recommended.
What is the coverage rate?
The estimated coverage for the diluted solution is approximately 7m² per litre of product (which is 1 litre of concentrate mixed with 3 litres of water, making 4 litres of working solution).
Troubleshooting
Surface still feels smooth after treatment.
The surface may not have been adequately agitated or the solution may have dried too quickly. Reapply, ensuring thorough agitation and preventing the solution from drying out. Ensure proper dilution was used.
Paint is peeling or not adhering well.
This indicates the surface was not properly etched or cleaned prior to painting. Ensure all laitance and salts were removed and a sufficient 'key' was created. Re-etching may be necessary.
Visible white powdery residue after drying.
This is likely salt residue or unrinsed solution. Thoroughly rinse the surface again with clean water until all residue is gone. Ensure no solution was left to dry on the surface.
Uneven appearance after painting.
Uneven application of the acid etch can lead to patchy adhesion. Ensure the solution was applied and agitated uniformly across the entire surface.
Pros and Cons
Pros
- Ensures superior paint adhesion on challenging surfaces.
- Effectively removes unwanted surface contaminants like laitance and salts.
- Prepares smooth concrete for effective painting by creating a necessary surface 'key'.
- Concentrated formula offers good value and can be diluted for specific needs.
- Versatile for use on floors and in pools.
Cons
- Acidic nature requires strict safety precautions (gloves, eye protection, ventilation).
- May damage surrounding materials if not applied carefully.
- Not suitable for all surface types; primarily for concrete and render.
- Requires thorough rinsing to remove all residue after etching.
- Potential for uneven etching if application is inconsistent.
Setup, Compatibility & Care Instructions
Preparation is Key:
- Safety First: Always wear appropriate personal protective equipment (PPE), including chemical-resistant gloves, eye protection (goggles or face shield), and protective clothing. Ensure good ventilation in the work area.
- Surface Cleaning: Sweep or wash the surface to remove loose dirt and debris before application.
- Dilution: Mix the Acid Etch solution with water at a ratio of 1 part Acid Etch to 3 parts water in a plastic watering can or bucket. Never add water to the acid.
Application:
- Wetting: Lightly dampen the concrete or mortared surface with plain water. Do not flood the area.
- Application: Apply the diluted solution evenly using a stiff yard brush. Work in manageable sections.
- Dwell Time: Allow the solution to fizz and work on the surface for approximately 10-15 minutes. Do not allow it to dry.
- Agitation: Agitate the surface with the yard brush during the dwell time to ensure even etching.
- Rinsing: Thoroughly rinse the entire surface with clean water. Use a hose or pressure washer to ensure all residue is removed.
- Neutralization (Optional but Recommended): For added assurance, a light rinse with a mild alkaline solution (like baking soda and water) can neutralize any remaining acid before the final rinse.
- Drying: Allow the surface to dry completely before applying any paint or coatings.
Compatibility:
- Suitable for power-floated concrete floors, other concrete surfaces, mortared floors, and pool surfaces.
- Not recommended for use on natural stone, polished surfaces, or surfaces sensitive to acid.
Care:
- Store the product in its original, tightly sealed container in a cool, dry, well-ventilated area, away from direct sunlight and incompatible materials.
- Keep out of reach of children and pets.
- Clean application tools immediately after use with plenty of water.