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  1. #1
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    sandwash sealant

    am going to have my path which is sandwash jet washed once the rain stops, its almost black

    is there a sealant i can put on afterwards which might afford some protection, any one any experience with this, cheers

    live in pattaya by the way

  2. #2
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    Khun Custard's Avatar
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    We had the same problem last year with the Shanghai rendered (small stones set in concrete) paths and decks at our home
    It requires scrubbing with some very nasty chemical - could be Hydrocloric Acid by the yellow fumes I saw coming off and then a coat of special sealant which was a bit expensive .

    The guy we have used on two occasions K. Chang Tuun Ph 0817793697 charges by the Sq. meter. He runs a very big team of workers who specialize in laying and cleaning in the Pattaya area.

    Almost one year on now - no problems

  3. #3
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    Quote Originally Posted by Khun Custard View Post
    We had the same problem last year with the Shanghai rendered (small stones set in concrete) paths and decks at our home
    It requires scrubbing with some very nasty chemical - could be Hydrocloric Acid by the yellow fumes I saw coming off and then a coat of special sealant which was a bit expensive .
    I just had the same thing made on my balcony and he used some sort of acid that was yellowish and smelled like hell. Then it started raining.

    He is supposed to put a sealant on it any day now, but it's all dirty again. lol

  4. #4
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    Its hydrochloric acid for sure. You can pick it up at your neighborhood hardware store for around 200 baht per gallon. Thai's mix it 50/50 water. Scrub with a good brush wear a mask for fumes and eye protection. Don't wear your Sunday best. You can buy a power washer at Home Pro for less than 3,000 baht and your good for the rest of your life. Good for many applications including old paint removal, car wash, scat on the loo walls and the old fashioned Hooter scrub.

  5. #5
    Member Dino's Avatar
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    Quote Originally Posted by ltnt View Post
    Its hydrochloric acid for sure. Thai's mix it 50/50 water. Scrub with a good brush wear a mask for fumes and eye protection.
    I need to break out my pics. My guy, I believe, was barefoot with his shirt pulled up covering his mouth and nose. No eye protection other than his red eyes from whiskey.

  6. #6
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    you can use a bleach solution to kill the algae instead

    a bit safer

    when it is dead and dry, you can scrub it up

  7. #7
    Member Dino's Avatar
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    Quote Originally Posted by Dino View Post
    Quote Originally Posted by ltnt View Post
    Its hydrochloric acid for sure. Thai's mix it 50/50 water. Scrub with a good brush wear a mask for fumes and eye protection.
    I need to break out my pics. My guy, I believe, was barefoot with his shirt pulled up covering his mouth and nose. No eye protection other than his red eyes from whiskey.
    My bad, he had his shoes on.


  8. #8
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    Many sealers available at the hardware shops from TOA,Silka and other brands.Quiete expensive though,think most of them work out at about 100 Baht a square meter.Look for the water reppelants with a picture of sandwash or natural stone on the bottle.

  9. #9
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    A very good power washer with a good detergent will do the job no need for acid inhale it and your yesterdays news !!!!. I do mine every year after the rainy season and it is as good as it was from day 1.

  10. #10
    Member Joe66's Avatar
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    I got some small stones on my steps,
    each step was done by a different company,
    the last one was very good protected,
    the others not



    after cleaning the stones, how could I do some protection work (best would be, with lotus effect) ?
    chang mai, chang rai ... cha, cha, cha

  11. #11
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    There is a product in the USA called Diamond Super Clear. It is essentially just clear lacquer so you could use that as a sealer. The commercial items probably have a UV inhibitor in them, but then again, maybe not.

  12. #12
    Member Joe66's Avatar
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    thanks, I hope, kanyong, homeWorks or homePro got this sealer in stock,
    or last chance Rayong, Global House.

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