A: Justin, this product is fine for cold weather applications. However, please note that we recommend conditioning the material to between 65 and 77 degrees Fahrenheit for at least two hours prior to mixing.
A: Maybe if the foam does not push any of the block up or out.
A: Fac1, Sika PostFix is intended to be used as a backfill for fence posts, mailbox posts, signage pasts, lamp posts, etc. It is not intended to be used for structural posts or posts exposed to a lot of sideways loads, so if you are only planning to use it to "fill in" the concrete block that should be fine so long as it is not being used to structurally support your retaining wall.
A: This product is very lightweight. I would think the weight of concrete would be better suited for use. Also, while somewhat adherent, it is not a bonding agent like a construction adhesive
A: I would not recommend using Sika PostFix for this application.
A: I don’t think this would work for that purpose, when it hardens it is a little porous so I would think it could disintegrate if exposed. But it has held up great as fence post support in our strong desert wins!
A: bucketlist, one pouch of Sika Postfix will produce roughly 0.7 cubic feet of expanded foam.
A: Based on my experience at least 3/4 or more depends on the temperature. I found it expanded more on warmer conditions.