Product reference sheet

Sika PostFix is a two-component, mix-in-the-bag expanding foam for supporting non-structural posts such as fence, mailbox, and signposts. This two-part, pre-proportioned polyurethane expanding foam has been specifically formulated to provide a lightweight, mix-in-the-bag, fast-setting solution. This high-strength backfill can be used for wooden, PVC, and steel in-ground supports.



Simple application - just roll, mix, cut and pour


Sets in as fast as 3 minutes


High strength and resistant to uptake of water


Seals and protects base of post


Compatible for use in cold conditions without the need for additives