One of the most difficult aspects of working with plaster, cement, or skim coatings is achieving strong adherence, particularly on smooth or previously painted surfaces. This is where Plasterkey, a famous bonding agent in South Africa, comes in handy. Plasterkey, which is designed to assist new plaster cling to challenging substrates, is extensively utilised by builders, contractors, and DIY enthusiasts who want dependable, long-lasting results.
What is Plasterkey?
Plasterkey is a liquid bonding agent that increases the adherence and flexibility of plaster. It is frequently used to surfaces where standard plaster would difficult to adhere, such as:
- Painted walls.
- Smooth concrete.
- Dense concrete blocks
- Precast surfaces
- Low-porosity substrates.
Plasterkey reduces delamination, cracking, and hollow places that occur when plaster fails to adhere properly.
How Plasterkey Works
Plasterkey is a modified acrylic polymer that generates a strong, flexible coating when applied. This film serves as a link between the existing surface and the new plaster layer. When fresh plaster is applied, it chemically and mechanically adheres to the treated surface, resulting in long-lasting adherence.
Key operating concepts include:
- Improved surface bonding strength
- Reduced chance of plaster separation
- Improved adaptability to temperature and moisture changes
- Improved workability of the plaster mix.
Where Plasterkey is Commonly Used
Plasterkey is extremely adaptable and may be utilised in a variety of projects, including residential, commercial, and industrial. Common applications include:
1. Renovations
When old painted walls require new plastering, painting alone will not suffice. Plasterkey forms a bond coat, allowing plaster to be applied without having to remove all previous paint.
2. Repairs for smooth surfaces
Smooth concrete or precast panels frequently reject plaster. Plasterkey permits the fresh layer to adhere tightly.
3. Plasterboard and Cement Board Installation
Certain boards have poor suction rates. Plasterkey ensures that the plaster adheres uniformly and minimises drying inconsistencies.
4. General Plastering for Difficult Areas
Plasterkey’s additional flexibility benefits curved surfaces, edges, and surfaces that are subjected to slight movement.
Plasterkey offers stronger adhesion
Plasterkey considerably strengthens the bond between plaster and substrate, lowering the risk of peeling and cracking.
Time-Saving
Plasterkey is a quick and effective bonding solution that eliminates the need to remove old paint or roughen surfaces manually.
Cost-Effective
Preventing plaster failure decreases the need for future repairs.
Versatile and easy to apply
Plasterkey may be brushed, rolled, or sprayed. It is compatible with most classic plaster mixtures, including sand/cement plaster and gypsum-based products.
Improves durability
The bonding film helps to protect the plaster from environmental stress, ensuring it lasts for years.
How To Apply Plasterkey
Using Plasterkey correctly is critical for getting the greatest results.
Step 1: Surface Preparation
Clean the surface thoroughly.
Remove the dust, oil, loose paint, mould, and grease.
Let the surface dry fully.
Fill cracks or gaps as needed.
Step 2: Apply Plasterkey
Stir the product thoroughly.
Apply a single, even application with a brush, roller, or spray.
Allow it to get tacky before plastering (about 10-20 minutes).
Do not allow it to dry completely unless advised by the manufacturer.
Step 3: Apply Plaster
Once tacky, apply the plaster immediately.
Work systematically to ensure the right thickness.
Smooth and level the plaster as usual.
Step 4: Curing
Allow enough cure time depending on the plaster type.
Avoid overwetting.
Protect the plaster from extreme temperature variations during the initial drying.
Tips for the Best Results
Do not dilute Plasterkey unless the manufacturer’s instructions permit it.
Avoid applying it to wet or damp surfaces.
Ensure full covering for maximum adherence.
Use the appropriate plaster mix for the chosen surface.
Keep Plasterkey out of direct sunlight and moisture.
Frequently Asked Questions (FAQ)
1. Can I use Plasterkey on painted walls?
Yes. It is specifically intended to improve plaster adhesion to painted or sealed surfaces.
2. Should I sand the wall before applying Plasterkey?
Light sanding is beneficial, but not usually necessary. Plasterkey lessens or eliminates the need to roughen the surface.
3. Can Plasterkey be used outside?
Yes, Plasterkey works both indoors and outdoors. However, please refer to the product label for precise weather and curing instructions.
4. Does plaster have to be placed immediately after Plasterkey?
Yes, plaster should be put while the PlasterKey is still sticky. If it dries entirely, you might need to reapply.
5. Is Plasterkey compatible with both gypsum and cement-based plasters?
Absolutely. It works with most plaster kinds, including gypsum skim coatings and sand/cement mixtures.
6. Can I paint over Plasterkey-applied plaster?
Yes. Once fully set, the plaster can be primed and painted as usual.
Conclusion
Plasterkey is a very powerful bonding chemical that addresses one of the most common plastering issues: adhesion failure. Plasterkey guarantees a strong, long-lasting bond when rebuilding a painted wall, fixing smooth concrete, or adding fresh plaster to tough surfaces. Its simplicity, versatility, and dependability make it a favourite choice among both experts and DIY homeowners. When applied appropriately, Plasterkey improves the durability and performance of plaster, resulting in long-lasting, high-quality outcomes.
Contact Paintcor for more information.
See also:
Concrete Floor Osmotic Barrier Primer
Floor Paint: Transform Your Floors with Style and Durability