Hello,
Anyone have tips on good foam without isocyanates or other harmful substances? In this case, it will be used to fill space around ventilation pipes in the basement, about 7 pieces.
Anyone have tips on good foam without isocyanates or other harmful substances? In this case, it will be used to fill space around ventilation pipes in the basement, about 7 pieces.
At the local Hornbach, I have found the following:
Insulating foam ILLBRÜCK JF100 700ml - 149 SEK
SOUDAL Soudafoam SMX Gun 500ml - 279 SEK
Sealant foam SIKA Sikaboom-461 Top 250ml - 389 SEK
All require a foam gun which seems to cost anywhere between 200 and 500 SEK and requires cleaning, which also costs a small amount but doesn't seem too complicated.
Does anyone have experience with any of them?
Insulating foam ILLBRÜCK JF100 700ml - 149 SEK
SOUDAL Soudafoam SMX Gun 500ml - 279 SEK
Sealant foam SIKA Sikaboom-461 Top 250ml - 389 SEK
All require a foam gun which seems to cost anywhere between 200 and 500 SEK and requires cleaning, which also costs a small amount but doesn't seem too complicated.
Does anyone have experience with any of them?
https://www.jula.se/catalog/bygg-och-farg/farg-och-fog/lim-fog-och-spackel/fog/hybridskum-024209/
Works quite well and nozzle included. Remember to hold the tube upside down when spraying.
Works quite well and nozzle included. Remember to hold the tube upside down when spraying.
Hornbach has made a mistake, text and image are Sika 561?
I have used Sika 463, not free from isocyanate, but low content. I got a tip from a craftsman about it to avoid needing a gun and cleaning, when you only need a can. Compared to "regular" foam, I find it more sensitive to dampen where you are sealing, and it expands less and slower. Quite sensitive to having space to hold the can upside down. But it absolutely works to use.
I have used Sika 463, not free from isocyanate, but low content. I got a tip from a craftsman about it to avoid needing a gun and cleaning, when you only need a can. Compared to "regular" foam, I find it more sensitive to dampen where you are sealing, and it expands less and slower. Quite sensitive to having space to hold the can upside down. But it absolutely works to use.
Hornbach where I live recommends Foam Sealant Sika Sikaboom-461 Top 250 ml for 389 kr, which they only have one bottle of in stock. This version has a built-in applicator and is completely isocyanate-free, but it is also quite expensive.
How much might you need? Is 250 ml enough to fill around the ventilation pipe?
Right now, I am planning to place a plate on the inside to fix the pipe and spray the foam sealant from the outside, so that should mean less exposure to isocyanates. However, it's a tricky application where it needs to be placed far inside the wall in the right spot, and some adjustments might be needed afterward to get the correct position/slope.
How much might you need? Is 250 ml enough to fill around the ventilation pipe?
Right now, I am planning to place a plate on the inside to fix the pipe and spray the foam sealant from the outside, so that should mean less exposure to isocyanates. However, it's a tricky application where it needs to be placed far inside the wall in the right spot, and some adjustments might be needed afterward to get the correct position/slope.
461 is completely isocyanate-free, right?
According to the product image, it's a 500 ml bottle?
How many dm3 do you need to fill?
A 500ml bottle of 463 is enough for many, many dm3. But STP foam should expand even less.
Make sure to spray water properly before foaming.
(tip: extra nozzles are available for purchase if you don't use the entire amount)
According to the product image, it's a 500 ml bottle?
How many dm3 do you need to fill?
A 500ml bottle of 463 is enough for many, many dm3. But STP foam should expand even less.
Make sure to spray water properly before foaming.
(tip: extra nozzles are available for purchase if you don't use the entire amount)
Extension builder
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https://www.hornbach.se/p/isolerskum-illbruck-jf100-700ml/6815759/
I recently bought this by mistake. I was going to fill a couple of spaces before leveling compound, and for that, it was completely useless. I ended up having to wipe everything off as it neither expanded noticeably nor cured.
In the right place, it might work, but not for what I needed it for.
I recently bought this by mistake. I was going to fill a couple of spaces before leveling compound, and for that, it was completely useless. I ended up having to wipe everything off as it neither expanded noticeably nor cured.
In the right place, it might work, but not for what I needed it for.
Thanks, and that's exactly the problem, a lot of the foam that is isocyanate-free seems to perform poorly. That they expand less seems very common.
But now I know that JF100 is out, otherwise, it did look very affordable, but it also has to work.
It wouldn't be the first time Hornbach has incorrect information on their site. I'll do some calculations to see how much is needed, but as you say, many isocyanate-free foams seem to expand quite little.F fallskydd said:
https://swe.sika.com/sv/loesningar-inom-bygg/fog/byggfog-och-skum.html
Scroll down and look at Questions and Answers. It talks a bit about different types of foam.
One reason why foam does not cure or expand is that it is too dry.
I don't know why Sika doesn't have 461 on their page.
But if you look under Yield for 463, they say:
Whereas for 561 (which is presumably similar to 461) it states:
You'll have to calculate yourself. Less, but quite a few liters.
Scroll down and look at Questions and Answers. It talks a bit about different types of foam.
One reason why foam does not cure or expand is that it is too dry.
I don't know why Sika doesn't have 461 on their page.
But if you look under Yield for 463, they say:
| 500 ml container applied with gun ~19 L |
Whereas for 561 (which is presumably similar to 461) it states:
| Foam yield in joint, 3 x 5 cm, per 500 ml with gun 8.6 LPM |
Sundströms believes that supplied air respirators are necessary when using Sika Boom-157 All Seasons, mainly because it contains Propane (CAS no. 74-98-6). From what I understand, it's because propane is heavier than oxygen and thus displaces it, which of course can be problematic. However, it's hard to see how this could be a problem if you're standing outdoors.
The ventilation is at least 17x17x30 cm and the pipe will be 10x30 cm. After some calculations, we end up with 6.31 liters of expanding foam. Some of it will need to be trimmed off, so maybe a little extra would be good.
According to the data sheet for the expanding foam recommended by Hornbach (Expanding Foam SIKA Sikaboom-461 Top), one canister covers 7 liters if you use the nozzle, and 7.21 liters if you use a gun.
So that should mean one canister is enough for one vent, but it requires that nothing spills out, which is probably a significant risk. Unfortunately, they only have one canister in stock.
According to the data sheet for the expanding foam recommended by Hornbach (Expanding Foam SIKA Sikaboom-461 Top), one canister covers 7 liters if you use the nozzle, and 7.21 liters if you use a gun.
So that should mean one canister is enough for one vent, but it requires that nothing spills out, which is probably a significant risk. Unfortunately, they only have one canister in stock.
I think they probably meant 500 ml.
Considering filling it with c mixture instead, though it's unclear how difficult it will be to access.
Considering filling it with c mixture instead, though it's unclear how difficult it will be to access.
I estimate that 500ml of 561 gives about 13l? Hard to believe that 461 only gives half. So if it's not a tiny can, you should have some margin. But it's hard to know what mistake Hornbach made with the product info. Even if you fill a bit with mortar, should it be good with foam in the middle?