Product Description

MC 300® ULTRAFINE Cement is a blast furnace slag based cement composed of ultrafine particles, designed for injection into loose soils, rock, concrete, and down-hole applications. MC 300 has a grain size of d95 equal to 6.0 microns and a d50 of 2.5 microns. The composition is comparable to high sulfate – resistant cements. It is suited for stabilizing or sealing all earthen foundations; especially for permanent structures such as tunnels, dams, deep foundations and oil storage tanks. Because MC 300 cures into a hardened concrete, it causes no pollution to underground soils or water supplies.

MC 300 is used with NS-200, a super plasticizer, to prevent clumping of microfine cements. It is generally used at 1-2 wt. % of the dry cement weight.

Product Advantages

  • Excellent penetration into fine sands and finely cracked rock
  • High cured strength- chemically activated to produce rapid curing to high strength
  • Excellent durability- impermeable to ground water and seawater
  • Low permeability- 10-9 cm/s permeability for neat grout.

Product Applications

  • Geotechnical grouting
  • Oil well remedial cementing
  • Seal off underground streams
  • Create cut off walls for dam construction
  • Reinforce foundations in dams and buildings
  • Reinforce and waterproof tunnel walls and roofs
  • Create waterproof basins for reservoirs
  • Facilitate all types of excavation
  • Stabilize hazardous waste.
  • Provide secondary containment for nuclear waste


Grain Size 6.0 d95 ASTM C204
Grain Size 2.5 d50 ASTM C204
Bulk Specific Gravity 0.7 g/cm3 ASTM C150
Absolute Density  2.9 g/cm3 ASTM C150
Volume 0.041 gal/lb ASTM C150
Surface Area  1.9 x 104 cm2/g BET Method
  NS-200= 2% by weight . T=20⁰C
Marsh Funnel Mix Time* Run Out
  0 min 29 s/dm3
  30 min 30 s/dm3
  60 min 30 s/dm3
  90 min 30 s/dm3
Sedimentation Mix Time* By Volume
  30 min 0%
  60 min 2%
  90 min 3%
3d 3.5 N/mm2  508 psi
7d 5.0 N/mm2 725 psi
14d 6.0 N/mm2 870 psi
28d 6.0 N/mm2 870 psi

* Suspension mixed continuously at 350 rpm until tested.
** Measured on 4 cm x 4 cm x 16 cm prisms.
Note: The data shown above reflects typical results based on laboratory testing under controlled conditions. Reasonable variations from the above data may be expected.


A colloidal mixer is necessary for mixing MC 300. The order of addition to the tank is: water, NS-200, mix, then add MC 300.

Contact a DE NEEF® technical services representative for application specific installation procedures.

Packaging & Handling

MC 300:

55 lb bags
40 bags per pallet.

Store on pallets in dry and cool location.

NS-200: 3.5 gallon pails (35 lb).

Store in original containers at or above 60⁰F.

One Component Grout Mix

MC 300 GROUT MIX (55 LB BAG)      
Batch Size 5 Bages (275 lbs) 4 Bages (220 lbs) 3 Bages (165 lbs)
Water: Cement 1:1 2:1 3:1
Water 33 gal. 53 gal. 60 gal.
NS-200 0.28 gal. 0.22 gal. 0.16 gal.
MC-300 275 lbs. 220 lbs. 165 lbs.
TOTAL 44 gal. 62 gal. 67 gal.
TOTAL 555 lbs 668 lbs 672 lbs

Set time for above mixes is 3-5 hours

Health and Safety

Freshly mixed cement grout may cause skin injury. Avoid contact with skin where possible and wash exposed skin promptly with water. Use dust mask when breaking bags and mixing. Avoid eye contact, if exposed, rinse immediately with water and seek prompt medical attention. Always use protective clothing, gloves, and goggles during use. Do not ingest. Refer to SDS for detailed safety precautions.

In the event of an EMERGENCY call:

CHEMTREC 800-424-9300. | North America customer service: 1-877-4AD-MIX (1-877-423-6491)

We hope the information here will be helpful. It is based on data and knowledge considered to be true and accurate, and is offered for consideration, investigation and verification by the user, but we do not warrant the results to be obtained. Please read all statements, recommendations, and suggestions in conjunction with our conditions of sale, which apply to all goods supplied by us. No statement, recommendation, or suggestion is intended for any use that would infringe any patent, copyright, or other third party right.

DE NEEF® is a trademark, which may be registered in the United States and/or other countries, of GCP Applied Technologies Inc. This trademark list has been compiled using available published information as of the publication date and may not accurately reflect current trademark ownership or status.

© Copyright 2018 GCP Applied Technologies Inc. All rights reserved.

GCP Applied Technologies Inc., 62 Whittemore Avenue, Cambridge, MA 02140 USA.

In Canada, GCP Canada, Inc., 294 Clements Road, West, Ajax, Ontario, Canada L1S 3C6.

Ce document est à jour seulement à la date de la dernière mise à jour indiquée ci-dessous et n'est valide que pour une utilisation au Canada. Il est important que vous consultiez toujours les informations actuellement disponibles sur l'URL ci-dessous pour fournir les informations les plus récentes sur le produit au moment de l'utilisation. Des documents supplémentaires tels que les manuels de l'entrepreneur, les bulletins techniques, les dessins détaillés et les recommandations détaillées ainsi que d'autres documents pertinents sont également disponibles sur Les informations trouvées sur d'autres sites Web ne doivent pas être utilisées, car elles peuvent ne pas être à jour ou applicables aux conditions de votre site et nous déclinons toute responsabilité quant à leur contenu. S'il y a des conflits ou si vous avez besoin de plus d'informations, veuillez contacter le service client de GCP.

Last Updated: 2020-01-16