Call or email for pricing and availability

Sika® PostFix® Fence Post Mix


A two component, mix-in-the-bag expanding foam for supporting non-structural posts such as fence, mailbox, and sign posts.


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

We Also Recommend