AP Fill 420
Fill Voids with Polyurethane
Void Fill Foam for Abandoned Pipes, Mine Shafts & Other Large Voids.
Of the most resilient void fill foams, AP Fill 420 is a two-component, high expansion, hydro insensitive polyurethane foam. It’s the top slab solution for polyurethane void fill. AP Fill 420 weighs 1.8 to 2.2 pounds per cubic foot. For similar products, see the page on Concrete Leveling.
- Unconfined expansion rate: 35 times.
- 90% of full strength in 15 minutes.
- High expansion.
- Works in wet environments – displaces water.
- Bonds with soil and concrete.
- Closed cell.