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Community and Q&A

The Price of Liquid Flashing Tubes

RussMill | Posted in Green Products and Materials on

Zip liquid flash 32.99
WR meadows air shield 18.75
Sika everflash 17.70
Hohman and barnard liquid flash 18.99
Dowsil 778 flashing 17.39


ALL of these are pretty much the same EXCEPT for dowsil being silicone. I like anything ZIP/HUBER but cannot pay an almost double price tag.

Am i missing something?

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  1. Josh_Sq | | #1

    Are you looking at online prices or at your local yard? Amazon is way overpriced. In Vermont I was able to get Liquid flash for 18-19 dollars.

    1. RussMill | | #2


      I checked several online/local suppliers, the one that stocked ZIP in 20 oz. Sausage packs would only get me down to 30- a tube.

      I HATE to order stuff like this online because if its date has run out its a hassle.

  2. AJ__ | | #3

    Near Vancouver, Canada, I was quoted CAD $52 for Zip. I can get Henry Air Bloc LF for CAD $18. Whilst I would prefer to stay with the Zip products, it's 3x the price. Not sure why the cost varies so much. Try contacting your Huber rep, mine was very helpful.

  3. blamus20 | | #4

    its true, im facing the same issue. my local lumber yard (boulder lumber under sterling lumber) is selling zip 29oz for $70 a tube. My framer just ordered one and and jaw dropped. I told him i'm going to use henry air bloc LF @ $17 per 20 oz tube. And he tells me to say goodbuy to my warranties. Oh well, warranty claims always go back to installation error anyway....

    I actually wonder if I could use what I used for basement waterproofing - which was also a fluid applied elastomeric liquid rubber membrane. At $200 per 5G bucket its the cheapest. I honestly don't see why not. In my case I used MiraSeal, thick enough to be troweled and looks/feel just like zip liquid flash. If its waterproof enough for basements and bathrooms, why wouldn't it work as window flashing?

    Ames blue max trowel version is even thicker.

    1. jeffesonm | | #16

      I was wondering the same thing about Hydroban. It's a liquid applied waterproofing membrane good enough to span cracks and gaps. It lists wood as an acceptable substrate although it does say interior only.

  4. JC72 | | #5

    IIRC the ZIP/HUBER liquid flash like their tape is a re-brand. It was posted on this site a couple of years ago.

  5. blamus20 | | #6

    Oh I would love to see the link for that! What is it rebranded from? Honestly it makes perfect sense. They make osb, but elastomeric polymers come from big chemical plants, probably only a few places with the capability to produce it in such quantities.

    1. JC72 | | #9

      ZIP-tape is acrylic and I believe was 3M or Siga Wigluv. Liquid flash might be Prosoco.

  6. vashonz | | #7

    One of the things you may look at is regarding film thickness. I used R-Guard over Henry Air Bloc, even though it cost more, the spec calls for a thinner film.
    I think that when I calculated for the thicker film required by Air Bloc LF the cost became about equal.

    We ended up combining R-Guard with Henry Blueskin.

    1. blamus20 | | #10

      That's one thing going for zip liquid flash - you don't even need to measure, the official coverage is as long as substrate is no longer visible. That makes it's easy for people.

    2. blamus20 | | #15

      Prosoco Fast Flash is $36 per 20oz sausage (gun grade) for me, thats actually more than zip LF ($30 on amazon). The FF roller grade is $60/quart? though isn't everyone just use the thicker gun/trowel grade nowadays?

      FF says 15sf/20oz sausage
      AirBloc LF 10sf

      Henry Airbloc LF is $17 /20Oz sausage. thats half the price

  7. pnwbuilder | | #8

    I am curious as to how these products compare to Tremco's products. I've used Dymonic 100 on my project and am pretty happy with it so far. I paid $8.50 US per 20 oz sausage.

    1. blamus20 | | #11

      Oh that's super interesting, and super cheap! At first my first reaction was that dymonic 100 is a polyurethane sealant - stuff I'm using as. Caulking for joints and seams like foundation/sill junction. But then I read the description and it says can be used as a liquid flashing for rough openings!

      In that case it's more of the question of STPE polymers vs polyurethane sealants as a flashing. Everything else mentioned here is some form of STPE formula. Any chemical sealant/membrane scientists here?

      1. pnwbuilder | | #13

        One big difference that I am aware of is that Dymonic 100 has to be applied to a dry surface, while Prosoco (and probably all STPE polymers) can be applied over wet surfaces. Convenience vs cost for a DIYer, but in commercial environment that could be a deal breaker in wet climates.

      2. Turgz | | #18

        Not at scientist here but STPE was created to glued the windshield of cars back in the 70s.

        So it's one of the best material to bond hard bonding material (like rought osb, steel, glass) and it's both air tight and waterproof.

        Also the mores moisture there is in the air, the faster it will cure.

        I'm not saying that polyurethane can't be used for flashing but STPE is pretty much the best stuff out there for now.

        But yeah.. Mercedes aren't the cheapest on the market

  8. blamus20 | | #12
  9. MattJF | | #14

    All the literature for Dymonic 100 seems to refer to flashing masonry or exterior gypsum. I haven't seen any references to using it on wood as a flashing product.

    I also don't see any references to the permeability, which is one of the selling points points for STPE products. Permeability of flashing is less important than the entire WRB. The ability to dry will cause materials to last longer if they do become wet or start wet.

  10. Turgz | | #17

    Hi there,

    I didn't check the data sheets of all the products your mentioning but for example, Henry Air-bloc LF products is similar to ZiP but half the price.

    BUT they recommend that you put 25 Mil of thickness, where ZiP ask for 12 Mil.

    Also, I've seen a lot of comments about using basement liquid membrane for flashing. I would advised to call the manufacturer before using it because materials under the cladding can get really hot (200-250F) and will receive more stress than on below grade fondation, which could result in tear of the membrane.

  11. thrifttrust | | #19

    Henry Air-bloc is cheaper because it is heavily filled. Which accounts for it's lower price and thicker film requirement. Presumably, it's better at bridging large gaps, but it does not "flow" under the spreader as well as unfilled material. Personally I like the Prosoco system. It uses a slightly cheaper filled Joint and Seam Filler that is spread out one inch over seams. Then the more expensive Fast Flash covers the seam filler and is spread out to complete the flashing. The best prices I've found are at Small Planet Supply, Henry Air-Bloc: $14.14 Prosoco Joint and Seam Filler: $20.69 and Prosoco fast Flash: $23.57.

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