Simpson FH05 Crack-Pac Flex-420 Polyurethane Crack Sealer, 5 Gallon Resin w/ Pint of Accelerant Stainless Steel Joist Hanger Nails Testing shows that mixing with

Testing shows that mixing with the Optimix nozzle is 4 times more consistent than a standard spiral mixing nozzle

Both commercial and residential construction contexts where ease‑of‑install and durability go hand in hand

Extending the service life of existing fences

and mortar

so that full allowable loads (with minimum nailing) apply to heel heights as low as 3-7/8"

Simpson FH05 Crack-Pac Flex-420 Polyurethane Crack Sealer, 5 Gallon Resin w/ Pint of Accelerant Stainless Steel Joist Hanger Nails Testing shows that mixing withThe Simpson Crack Pac Flex H2O polyurethane injection resin seals leaking cracks, voids, or fractures from 1 32" to 1 4" wide in concrete or solid masonry. It is designed to perform in applications where water is seeping or mildly leaking from the crack. The polyurethane is packaged in the cartridge and an accelerator is packaged in the nozzle. When the resin encounters water as it is injected into the crack, it becomes an expanding foam that provides