Premium gypsum based anchoring cement

POR-ROK® Anchoring Cement is a premium, gypsum-based, non-shrink, hydraulic cement designed for anchoring heavy machinery, railings, and repairing cracks in concrete substrates. It is ready-to-use, requiring only the addition of water at the job site to create a durable, pourable compound. This product is suited for virtually unlimited applications and sets quickly without the need for heating or two-component mixing.

  • Pourable: Easy application for anchoring and patching.
  • Quick Setting: Hardens in 20-30 minutes.
  • Expansive: Grows slightly as it sets, filling in gaps thoroughly.
  • High Strength: Achieves strength superior to concrete within an hour.
  • Corrosion Resistant: Contains no alkalinity, preventing rust on metal.
  • No Special Tools Required: Simple mixing, no need for vibrating or rodding.
  • Compliance: Meets ASTM C-1107 for quality assurance.

Tech Sheet
Safety Sheet


Substrate Preparation

  • Ensure concrete is at least 28 days old and fully cured.
  • Clean the hole thoroughly, removing all particles and debris.
  • Water-scrub sides and bottom, then remove excess water to keep the hole uniformly damp.

Mixing and Application

  • For interior use: Mix 16 oz. of water per 5 pounds of POR-ROK® to achieve a smooth, flowable consistency. Adjust water slightly for a more plastic-like consistency if needed.
  • For exterior use: Apply regular POR-ROK® or Super Por-Rok® in environments with excessive water. Protect against water damage by shaping the material around the anchor to prevent water pooling.


  • Use an appropriate washer and insert the bolt with the head down.
  • After setting, options include topping with a cone of POR-ROK® or sealing with a rated exterior sealer after 7 days to ensure protection.

Application Notes

  • Color: Off White
  • Coverage: 50 lbs covers approximately 0.5 cubic feet.
  • Weight: 110 lbs per cubic foot.
  • Application Temperature Range: 35° – 95°F.
  • Set Time: Measured by ASTM C-191 standards.
  • VOC Content: 0 g/l.

Shelf Life

  • Shelf Life: 12 months. Rotate stock regularly.
  • Storage Conditions: Store in a cool, dry place away from sunlight in tightly sealed packages.

Test Data

  • Compressive Strength: Reaches up to 9000 psi over 28 days.
  • Expansion: Under moist cure, expansion is minimal at 0.15%.