Make your structures rainy weather ready by using BOYSEN® Plexibond™ Cementitious Waterproofing System. With the capability to eliminate cement plastering defects, eliminate water seepage and prolong service life of light building materials, it is ideal for waterproofing roof decks and firewalls.

More on Boysen Plexibond

Because of a lot of interest about Plexibond, we wrote more in-depth articles. Please click on the following to know more about this product:
Product Highlight: Boysen Plexibond
Boysen Plexibond Do’s and Don’ts

The first link is a clear step-by-step guide on how to use the product. There is also a video (see below) that will show you the process.

We get a lot of questions in our social media channels about this product especially during the dry season when it’s time to prepare your structures for the rains to come. If you read the comment sections under the blog posts, you may even see your question.  If you are not satisfied with the answer, you can always leave your comment or send an email directly to ask@myboysen.com.

Always Mix Boysen Plexibond with Portland Cement

Plexibond is not a stand-alone product. You have to mix it with portland cement. You can use it on your roof decks and firewalls, on the side of the wall where the water pressure comes from. Do NOT apply it on a surface which has been previously painted. Click on the second link above on the Do’s and Don’ts of Plexibond.

Watch the video to know more about the product.

Where Do You Use Boysen Plexibond

There are the common surfaces where you can use Plexibond: firewall, roof deck, ledge/canopy, concrete gutter, parapet wall.

Some people have asked us if they can use this product in their swimming pools or ponds. The answer is a resounding NO.

You cannot apply Plexibond over a painted wall. The reason is because the mixture of acrylic polymer (Boysen Plexibond) and cement weighs heavier than the usual coating. Therefore, it needs a bare and sturdy surface to adhere to. So if you want to apply this product on a wall for waterproofing purposes, you must first scrape of the existing paint and do a proper surface preparation. How? Click this link to know about how to prepare already painted concrete surfaces. You may find when you click the link that there are more things you can learn, especially if you have problem walls. However, if you follow the instructions, you will be able to achieve an excellent finish to a surface that you want waterproofed.

Use a Topcoat

For maximum durability, the application of topcoat is recommended. Boysen offers a wide range of products that is suitable as a topcoat to Boysen Plexibond.

Aside from added durability, the next best thing about being able to apply a topcoat is that you can choose a color that you’d like your surface to have. You are not limited to a grey hue.

Waterproof Your Homes

There you go, homeowners. Get your homes ready for the rainy season now.

Personally, I would call professional painters to do this whole process. That’s because I don’t want to over-extend myself. Just give me the responsibility to choose and apply the topcoat.

But maybe you are more ambitious than I am. In which case, give it your best shot. And if you hit some snags, just give our Technical Team a call directly so that you can have your answers quickly. They can be reached at (02) 8363-9738 local 417 to 418 during office hours.

Editor’s Note: This post was originally published on July 25, 2017 and has been updated for comprehensiveness.

Annie H Adlawan
Author

Annie is the Managing Editor of Let it B | MyBoysen Blog. An unrepentant workaholic, she runs this blog and her own company Talking Lions (https://talkinglions.com). She thrives on collaborating with people who are good at what they do, and working together with them to create something special.

59 Comments

  1. Avatar

    pwede ba eh lagay ang plexiband sa wall na my pintura n a

    • Annie H Adlawan

      Sorry, hindi pwede.

      You cannot apply Plexibond over a painted wall. The reason is because the mixture of acrylic polymer (Boysen Plexibond) and cement weighs heavier than the usual coating. Therefore, it needs a bare and sturdy surface to adhere to. So if you want to apply this product on a wall for waterproofing purposes, you must first scrape of the existing paint and do a proper surface preparation. How? Go to the article about Surface Preparation for Repairing Concrete (https://www.myboysen.com/surface-preparation-repainting-concrete/) to know about how to prepare already painted concrete surfaces. You may find when you click the link that there are more things you can learn, especially if you have problem walls. However, if you follow the instructions, you will be able to achieve an excellent finish to a surface that you want waterproofed.

  2. Avatar

    Pwedi po ba na pintura ang ihalo sa plexibond instead of cement?

    • Annie H Adlawan

      Hindi pwede. Formulated na semento ang ihahalo sa BOYSEN Plexibond.

      Mix 6.5 – 7.5 kg of Portland Cement to 4 Liters of BOYSEN Plexibond.

    • Annie H Adlawan

      Plexibond is better used on bare concrete.

      If you have other questions, please call (02) 8363-9738 local 417 to 418 during office hours and talk to our Technical Team. You can then have a discussion with the technical team and can get your answers quicker.

    • Annie H Adlawan

      Yes, you can use BOYSEN Plexibond as a waterproofing system for your bathroom, provided that there is no existing paint and that tiles will be installed after application.

      Click here for product details and instructions: http://bit.ly/2tWbfzu

      If you have more questions, please send an email to ask@myboysen.com or call (02) 8363-9738 local 417 to 418 during office hours and talk to our Technical Team.

    • Avatar

      Hello there.. we just finished applying plexibond on our balcony..problem is earlier nung hinahalo pa lang yung plexibond and cement nakita ko na nilagyan din ng tubig yung mixture.😱😱mga ½ ltr din siguro..tama po ba yung ginawa nmin? Thanks.

      • Annie H Adlawan

        Hi Arnel, Hindi siya pwedeng haluan ng tubig. Ang BOYSEN Plexibond ay formulated na haluan ng 6.5 to 7.5 kg of cement only. We do not recommend thinning the mixture using water.

        Dahil sa paghalo ng tubig, posibleng maapektohan ang performance ng produkto.

        Friendly reminder: For application on horizontal surfaces, kelangan mag apply ng mortar topping or tiles after BOYSEN Plexibond.

  3. Avatar

    pwede po bang imix yun plexibond sa cement na sesementuhin para isahang application na lang..kasi yun roof deck eh hindi pantay..dadagdagan ng halo ng semento sa medyo malalalim at nabibiawan ng tubig..pwede ba isabay na lang imix yun plexibond sa halo?

    • Annie H Adlawan

      Thank you for your message and for following us at Let it B.

      Para sa iyong roofdeck, hindi po pwedeng isahang application nalang ang semento at BOYSEN Plexibond. Please see below para sa recommended system.

      Step 1: Pantayin muna ang roofdeck gamit ang purong semento.
      Step 2: Mag-apply ng at least 3 mano ng BOYSEN Plexibond mixture (4 Liter BOYSEN Plexibond + 6.5 to 7.5 kg ng Portland Cement). Make sure na ipapahid sa buong area at sa parapet wall.
      Step 3 (optional): Mag-apply ng 1 mano ng purong BOYSEN Plexibond.
      Step 4: Lagyan ng at least 2 inches ng mortar topping sa ibabaw ng BOYSEN Plexibond.
      Step 5: Mag-install ng tiles o pinturahan gamit ang BOYSEN Acqua Epoxy system.

      • Avatar

        Ask ko lang po yung step 1, ilang oras o araw patuyuin yung purong semento bago pahiran ng flexi-bond?

        • Annie H Adlawan

          Hi Angelo,

          Nasagot na ito nung June 17 ng aming community manager via email. Pero eto ulit ang sagot just in case di mo nakuha ang email.

          Patuyuin ang semento ng 14-28 days bago pahiran ng Plexibond.

  4. Avatar

    And what is Matting? Kailangan po ba talaga yun sa pag-apply ng plexibond?

  5. Avatar

    Good day. I just want to know how to apply the plexibond. Thank you

    • Annie H Adlawan

      You were sent an email in reply to your question, as follows:

      “Regarding your inquiry, saan po ipapahid ang BOYSEN Plexibond (ex: firewall, roof deck)?”

    • Annie H Adlawan

      An email was sent directly by the Technical Team to you last January 10. Here is the main message again:

      Regarding your inquiry, saan po ipapahid ang BOYSEN Plexibond (ex: firewall, roof deck)?

  6. Avatar

    pwede bang lagyan uli ng elastomeric paint matapos mapahiran na ng plexi bond ang wall

    • MyBoysen

      Hello.

      Thank you for your comment and for following us at Let it B.

      Para sa iyong inquiry, yes, recommended pong pahiran ng pintura (tulad ng BOYSEN Permacoat o Titan Superflex Elastomeric Paint) ang kongkretong pader pagkatapos mag-apply ng BOYSEN Plexibond.

      Friendly note: Ang BOYSEN Plexibond ay formulated for use sa bare concrete wall o sa kongkretong pader na wala pang pintura. Hindi po ito pwedeng gamitin sa pader na may pintura na.

      Salamat po.

      • Avatar
        Jennylyn Tomas Reply

        What if napahiran ng plexibond na walang cement na halo. Tas pahiran ulet ng plexibond na may cement na, kakapit pa rin po kaya un? Thanks! Need asap reply..

        • Annie H Adlawan

          Message was sent by Technical Team to you., Jennylyn. Here is the main message again:

          Para sa iyong pader na napahiran na ng BOYSEN Plexibond na walang halong semento, pwede naman itong pahiran ulit ng BOYSEN Plexibond na may tamang halo na ng semento provided na wala pang pintura ang surface.

    • Avatar

      pagkatapos kong mag flexibond pwede ko bang masilyahan ng skim coat para makinis

      • Annie H Adlawan

        Pinadalhan ka na ng sagot via email but here it is again, Ryan.

        ———-

        Regarding your inquiry, ang skimcoat ay pinapahid as alternative plastering sa bare concrete walls. Pinapahid ito bago mag-BOYSEN Plexibond.

        • Avatar

          mam, can i apply plexibond sa wall na may skim coat po?

          • Annie H Adlawan

            Hi Maureen,

            Eto iyong sagot na pinadala sa iyo via email:

            Para sa iyong exterior concrete wall, pwede kang magpahid ng BOYSEN Plexibond on skimcoat provided na ang skimcoat na ginamit ay ang Konstrukt Permaplast K-201 High Performance Acrylic Skimcoat.

  7. Avatar

    Anong nangyari if nag apply ng plexibond na di na scrape ung pintura?at pwd ba sa interior concrete wall mg apply instead sa exterior?

    • MyBoysen

      Hi Evelyn.

      Thank you for your comment and for following us at Let it B.

      Regarding sa iyong inquiry, ang BOYSEN Plexibond ay formulated for use sa bare concrete walls. If naipahid ito sa surface na may pintura na, maaapektohan ang adhesion o kapit nito sa surface.

      Also, ang BOYSEN Plexibond ay to be applied as positive side waterproofing. Meaning nito, ay sa exterior o labas ng bahay ito pwedeng ipahid.

      Salamat po.

  8. Avatar
    Rommel de Vera Reply

    How can I remove flexibond from tiles? Napatakan kasi ng flexibond Yun mga tiles. Thanks in advance for your kind response.

    • Annie H Adlawan

      Regarding your inquiry, you can try removing the BOYSEN Plexibond on your tiles via manual scraping. You can use tools like putty knife / spatula.

      • Avatar
        Oliver Sulibit Reply

        pwede po ba ipahid sa bubong na yero ang plexibond?

        • Annie H Adlawan

          Hi Oliver,

          Hindi po pwedeng gamitin ang BOYSEN Plexibond sa yero. Formulated ito for use sa bare concrete substrates only.

  9. Avatar
    bong ramos Reply

    how do I apply plexibond on marine plywood as flooring? do I still need to mix with cement? will plexibond with cement crack as time passes on plywood floor application?

    • Annie H Adlawan

      Thank you for your comment and for following us at Let it B.

      For the application of BOYSEN Plexibond on marine plywood flooring, the same standard procedures for concrete applications are to be implemented. This would include the mixing of 6.5 to 7.5 kilograms of cement to 4-Liters of BOYSEN Plexibond while constantly stirring to prevent lumps.

      However, please note that the limitation of the product would be cracking on the joints of the marine plywood.

      • Avatar
        Renalinda tejada Reply

        Hi,pwde po ba ang plexibond ihalo sa tile adhesive?kasi po plano ko after iplexibond ang floor sa roof deck lagyan ko po ng tiles..

        • Annie H Adlawan

          This reply is from our technical team.
          ——-
          Hi Renalinda. Semento lang po ang pwedeng haluin sa BOYSEN Plexibond. Mix 6.5 to 7.5 kg of Portland Cement to 4 Liters of BOYSEN Plexibond.
          Para sa roof deck, apply 3-5 coats of BOYSEN Plexibond by brush or 2-3 coats by textured roller. Pagkatapos patuyuin, bago gumamit ng adhesive para sa tile installation.

          Kung may immediate technical concerns kayo, bukod sa aming social media accounts, pwede mo kaming matawagan sa (02) 8363-9738 local 416 to 418. Pwede mo rin kaming itext sa 0918-913-6000. Ito ang aming Technical Service Department at we’ll do our best to be of service. Ang aming office hours ay from 8:00 am to 5:00 pm Monday to Saturday.

  10. Avatar

    Can i use plexibond as a waterproof primer on tiles?

    • Annie H Adlawan

      Regarding your inquiry, BOYSEN Plexibond was formulated for use on bare concrete surfaces. It cannot be applied on top of tiles.

      If you have immediate technical concerns, apart from our blog, you may also reach us at (02) 8363-9738 local 416 to 418. This is our Technical Service Department and we’ll do our best to be of service. Our office hours are from 8:00 am to 5:00 pm Monday to Saturday.

    • Annie H Adlawan

      The Boysen Team sent you a reply via email. Here it is:

      “Thank you for your comment and for following us at Let it B.
      BOYSEN Plexibond can be applied using brush and textured roller. It cannot be applied using paint sprayer.”

      Good luck, Keane!

  11. Avatar

    Hi. Pede po ba sa first coating eh purong plexibond ala munang halong cement?

  12. Avatar
    nick siaotong Reply

    how many litters is your 1 gal? and how many square meter will it go?

    • Annie H Adlawan

      Hi Nick,

      Our Community Manager sent you a reply today via email, as follows,

      ———-

      Thank you for your comment and for following us at Let it B.

      BOYSEN Plexibond is available in 4-Liters (1 gallon) and 16-Liters packaging. The practical coverage of BOYSEN Plexibond per 4-Liters is 5-6 sq.m. [depending on surface texture and porosity].

  13. Avatar

    Same question ng sa taas. Paki email sakin sagot. Salamat

    Can flexibond be applied on existing semi gloss latex on exterior wall? Need to repaint exterior wall due water seepage.

    • Annie H Adlawan

      An email was sent to you directly by the Technical Team. Here is part of the email:

      “BOYSEN Plexibond was formulated to be applied on bare concrete walls only. It cannot be applied on walls with existing paint.

      For your firewall, we recommend consulting with professionals (ex: water proofing expert / contractor) to find the best solution to your problem.”

      If you have more questions, please email ask@myboysen.com or call (02) 363-9738 local 417 to 418 during office hours.

    • Avatar

      Hi po, can plexibond be applied on the same area which was already applied with plexibond? Yung ginawa po kasi nung mason ay hindi na-smooth yung firewall, pagkabully apply agad ng plexibond. Ngayon mga water seepage na sa wall.

      • Annie H Adlawan

        Hi Bong, our communications team sent you an email answering your above question. Here is the reply:

        “Thank you for your comment and for following us at Let it B.

        Para sa iyong firewall, pwede naman itong patungan ng BOYSEN Plexibond provided na wala pang existing paint at bare pa ang surface.

        In any case, rinirikomenda po namin na kumonsulta sa mga professionals tulad ng waterproofing experts o contractor para sigurado ang pag-aayos ng iyong problema.

        Thank you and have a great week ahead.”

  14. Avatar

    Can flexibond be applied on existing semi gloss latex on exterior wall? Need to repaint exterior wall due water seepage.

  15. Avatar
    Kelly Adoremos Reply

    Can flexibond be applied on existing semi gloss latex on exterior wall? Need to repaint exterior wall due water seepage.

    • Annie H Adlawan

      Hi Kelly,

      I sent your question to our Technical Team. They will be in touch with you through email. However, if you want to talk directly with an expert, you can call this number (02) 363-9738 local 417 to 418 during office hours.

      Thanks for dropping by,
      Annie

    • Avatar

      Hi Michael,

      I have the same question.
      What’s their reply to this?

      Thanks,
      ROLLY

    • Avatar

      Anong nangyari if nag apply ng plexibond na di na scrape ung pintura?at pwd ba sa interior concrete wall mg apply instead sa exterior?

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