In the previous Boysen PinTanong Konstrukt episode, Engineer Calvin from Konstrukt Construction Chemicals discussed the common problems on bare concrete. This includes cracks, unevenness, and roughness. He further explained that these can be resolved with Konstrukt products specifically designed to repair concrete imperfections.
In this episode, he’s going over how to use such products so you end up with a surface that’s smooth and ready for the next steps in your painting project. Watch and learn!
So, you’ve assessed the condition of your bare concrete surface and surmised that you would need render or skimcoat to fix the concrete problems you found on it. Konstrukt Construction Chemicals has the products you need and Engineer Calvin has a step-by-step tutorial and tips on how to use them.
Konstrukt Permaplast K-222 Interior Render
to level concrete imperfections such as unevenness and waviness that are 3 to 8mm in depth
- Using a painter’s spatula, scrape the surface to remove any loose concrete for easier and smoother application of the render.
- Next, dampen the surface. This is to remove dirt on the surface and help keep the product from drying too quickly once applied. Let the surface dry.
- Mix 5.5 liters of water per 25 kg bag of the product. Keep in mind that the resulting mixture will have a pot life of just 1 hour. Work efficiently to avoid wasting any product.
- With a trowel, apply the mixture vertically on the surface. This will be the first coat. Wait for an hour. Then, for the second coat, apply the mixture horizontally.
- After application, drying time will take 3 days. You can opt to apply skimcoat next to achieve a smoother finish.
Konstrukt Permaplast K-201 Acrylic Skimcoat
used for imperfections that are 2 to 3mm in depth; also used to smoothen a surface
- Using a painter’s spatula, scrape the surface to remove excess lumps formed when the render was applied.
- Mix a 1:1 ratio of sifted cement to Konstrukt Permaplast K-201 Acrylic Skimcoat. The resulting mixture will have a pot life of just 1 hour. Work efficiently to avoid wasting any product.
- With a trowel, apply the mixture vertically on the surface. This will be the first coat. Wait for an hour. Then, for the second coat, apply the mixture horizontally.
- Sand the surface to further give it a smoother texture. Do this after an hour or within 3 days after application.
- Allow no less than 7 days after application before applying primer to make sure the skimcoat has fully cured.
Scroll up to the video above to watch how these steps are done. Engineer Calvin also shares lots of additional info on it including if the products mentioned can be used on wood and why the products’ coats need to be applied in different directions.
What’s Next
Keep an eye out for the next PinTanong Videoserye episodes we’ll be releasing. Next, we’ll be tackling metal paints and how to paint metal surfaces at home including roofs and gates.
To get notified when PinTanong videos are released, you can follow the Boysen Facebook page or subscribe to the Boysen YouTube channel. Leave us comments as well if you have any questions on painting or want to suggest topics for us to discuss in the series.
For help on skimcoats, renders, and other construction chemicals, consult with an engineer from Konstrukt. Send a message to the Konstrukt Facebook page or call (02) 8363-9738 local 413 to 418 during office hours.
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