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Author: Subject: Impermeabilizantes
akmaxx
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[*] posted on 5-11-2016 at 06:08 PM
FWIW


I stepped into Comex St. Rosalia recently with their %30 discount and it was 1079 pesos for five gallons of 5 year. I walked next door to Sherwin Williams who assured me their product was superior for 5 year and it was 700. I laid it on and it seems that it filled the cracks. Won't know until the hurricanes....For 6000ísh I could lay tarpaper and not worry at all but we all rolls the dice.
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weebray
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[*] posted on 5-12-2016 at 06:10 AM


Quote: Originally posted by akmaxx  
I stepped into Comex St. Rosalia recently with their %30 discount and it was 1079 pesos for five gallons of 5 year. I walked next door to Sherwin Williams who assured me their product was superior for 5 year and it was 700. I laid it on and it seems that it filled the cracks. Won't know until the hurricanes....For 6000ísh I could lay tarpaper and not worry at all but we all rolls the dice.


You make my point. Everyone says their stuff is much better but no one backs it up with facts. Why is it better? I have seen no proof - all the 5 and 7 year stuff seems the same. BTW 5 and 7 year means absolutely nothing, in fact none of it lasts more than 3. Here in La P a cubeta is about half of what it costs you in SR.




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4x4abc
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[*] posted on 5-12-2016 at 10:04 AM


if you are dealing with quality products, the density will give you answers about durability (the cheaper ones have more water)
http://www.homedepot.com.mx/comprar/es/torres/impermeabiliza...
http://www.homedepot.com.mx/comprar/es/torres/impermeabiliza...
http://www.homedepot.com.mx/comprar/es/coapa-del-hueso/imper...

but never trust advertising (a different form of lying) - get the specs




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weebray
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[*] posted on 5-13-2016 at 06:15 PM


Quote: Originally posted by 4x4abc  
if you are dealing with quality products, the density will give you answers about durability (the cheaper ones have more water)
but never trust advertising (a different form of lying) - get the specs


Suspicions confirmed. It's all the same stuff with more or less water in it. The trick is in determining the % of solids. I think it's really a mute point tho. I've never found anything that lasts more than 3 years. El sol tan fuerte.




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monoloco
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[*] posted on 5-14-2016 at 12:41 PM


If it is a concrete roof, the first thing to do is to open up any cracks with a grinder and a diamond wheel so they are 1/8-1/4" wide and 1/4-1/2" deep and fill them with polyurethane caulking, (you can buy it at Sayer or Comex. It's like 3M 5200 marine sealant) then apply whatever roof coating you choose to use. Roof coating alone does a really lousy job of sealing cracks but that polyurethane sealant is bombproof.



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