Silt Sac

Silt Sac

The Silt Sac is a sediment control device installed underneath a catch basin grate to filter sediment filled rainwater running from your job site while allowing water to pass through freely. The rainwater and sediment fall into the catch basin and filter through the Silt Sac. They are very similar to the orange Catch Basin Sack however they are deeper, which allows them to hold more soil and sediment. They are very easy to use and maintain for any project. The Silt Sacs come in low flow (black fabric) and high flow (yellow fabric).


Silt Sac can be used as a primary or secondary sediment control device to prevent failure of your drainage system due to clogging. It must be maintained on a regular basis to function properly.


  • Wide Width Tensile: ASTM-D-4595 – 200/200 lb/in
  • Wide Width Elongation: ASTM-D-3786 – 12/8%
  • Grab Elongation: ASTM-D-4632 – 15%
  • Mullen Burt: ASTM-D-3786 – 800 psi
  • CPR Puncture Resistance: ASTM-D-4833 – 140 lb
  • Trapezoidal Tear: ASTM-D-4533 – 125 lb
  • UV Resistance: ASTM-D-4355 – 80% at 500 hr
  • Grab Tensile: ASTMD-4632 – 315 lb
  • Permittivity: ASTM-D-4491- 0.70 sec-1
  • Water Flow Rate: ASTM-D-4491 – 50 gal/min/ft2
  • AOS(1): ASTM-D-4751 – 40 sieve

Available as:

Part #SSC2118HF – Silt Sac, High Flow for Grate approx 21″ x 18″, Yellow
Part #SSC2118LF – Silt Sac, Low Flow for Grate approx 21″ x 18″, Black


Part #ENP IE01 – Imbiber Beads Imbicator, 7” x 7” packet (1 only)