Repeat after me: Boysen Plexibond is a specially formulated water-based acrylic polymer designed for mixing with Portland cement. Again, it isn’t a stand-alone product.
Every week, we receive the same inquiry about Plexibond, so for this post, we’re emphasizing this one important point: NO, YOU CAN’T USE BOYSEN PLEXIBOND ON ITS OWN. Just like cookies and cream, Plexibond and Portland cement must be mixed thoroughly (we’ll get into the details later) for it to function effectively. Yes, I said cookies and cream.
For starters, read this article to know more about our featured product:
How to Use Boysen Plexibond
We’ve extracted some essential details from the article above so you can have a second look. When starting any paint project, the first step is to always prepare the bare concrete properly. Remember that surface preparation is the fine line that separates success from a big flop. Next up, wet the area that is directly exposed to the sun. While waiting for the surface to dry, proceed to preparing the mixture of Boysen Plexibond and Portland cement. Here’s how:
Slowly mix 6.5-7.5 kilograms of sifted cement to a 4L gallon of Boysen Plexibond and then constantly stir the mixture either manually or with an electric mixer to prevent lumping.
The cementitious waterproofing system provided by the mixture eliminates any cement plastering defects while providing it with durability and an enhanced appearance. It forms a seamless, non-porous, and impenetrable layer that disperses any liquid upon contact, preventing any water seepage when applied on both vertical and horizontal surfaces. But, note that the cementitious coating can only cover hairline cracks but will not bridge gaps and active structural cracks. If you find such major damages, repair immediately using suitable sealants, or call a professional.
Once everything’s set, you can start the application. Follow the painting process mentioned in the article for both vertical and horizontal surfaces as to not cause any troubles. For maximum durability, use a compatible topcoat. You can choose from these Boysen products:
Dos and Don’ts
We’ve also written about Boysen Plexibond Dos and Don’ts based on frequently asked questions. Click the image to read the article.
Aside from questions asking us about whether or not you can use Plexibond without cement (again, you can’t), another question that pops up often is if it can be applied on previously painted surfaces—the answer is NO. Since it is a mixture of acrylic polymer and cement, it weighs heavier than a usual coating. To serve its purpose for a long time, it needs a bare and sturdy surface to adhere to. If you must, scrape off the existing paint and prepare the surface properly before applying Plexibond to ensure a leak-proof paint job. Just a reminder too, Plexibond as a waterproofing system is suggested to be used on concrete substrates ONLY for the same reason stated above.
Lastly, we have here some technical tips for you to use:
- Reinforce joints, corners, cracks, and areas that are prone to movement with a strip of fiberglass matting. It acts as the reinforcing membrane that gives support to flexible coatings such as the Boysen Plexibond.
- To use, put on the matting immediately after the second coat while the mixture is still wet, and let the matting stick to the mixture. Wait for it to completely dry before applying the succeeding coatings.
- To prevent future damage, wait for a day before applying a bond coat by brushing Boysen Plexibond straight from the can prior to laying out the mortar topping.
For questions, please call our Technical team at (02) 363-9738 local 417 to 418 during office hours or write an email to email@example.com.