Green Sand Additives

Bentonite Blends & Premixes

Two engineered sand system solutions built for different points on the performance-to-economy curve. From cost-efficient medium/high sand-to-metal ratio castings to premium, low-ratio, high-precision work.

Bentonite Blends & Premixes Image
Smecbond

Smecbond

Economic Efficiency

SMECBOND™ is an economical solution enriched with significant Sodium Bentonite and Indian Kutch Bentonite. Designed for cost-conscious foundries, it delivers dependable mould strength, high thermal durability, and consistent casting performance for medium and high sand-to-metal ratio applications.

  • Cost-Effective Performance: Delivers high thermal durability and exceptional strength performance in an economical formulation.
  • Reduced Mould Defects: Minimizes mould strength-related defects, making it ideal for medium and high sand-to-metal ratio castings.
  • Dimensional Consistency: Helps maintain casting dimensions and supports consistent casting weight throughout production.

Technical Data

Smecbond™ — Physical / Chemical Properties

Parameter Specification
Moisture 12% Max
Iron content as Fe2O3 9–10%
Methylene Blue Value (M.B). Value 360 mg/gm Min
M.B. Value (Calcined at 550°C) 55–60% M.B. Value
Swelling Index 28 ml/2 gm Min
Gelling Time Instant
Gel Formation Index 60 Min

Note: Test as per IS 12446:2007.

Sandiron Plus

Sandiron Plus®

The Premium Standard

SANDIRON PLUS® is a premium blend of high thermal durable imported bentonites and premium Indian Kutch-based bentonite. Engineered for demanding foundry operations, it delivers outstanding mould strength, lower moisture demand, and superior casting quality across a wide range of applications.

  • Premium Bentonite Technology: Combines imported high thermal durable bentonites with premium Indian Kutch bentonite for superior mould performance.
  • Optimized Sand Performance: Reduces moisture demand while improving mould integrity, green compression strength, and overall casting consistency.
  • Superior Casting Quality: Delivers excellent peel-off properties, smoother surface finish, and is especially well suited for low sand-to-metal ratio castings.

Technical Data

Sandiron Plus® — Physical / Chemical Properties

Parameter Specification
Moisture 12% Max
Iron content as Fe2O3 5–7%
Methylene Blue Value (M.B) Value 340 mg/gm Min
M.B. Value (Calcined at 550°C) 70–75% M.B. Value
Swelling Index 25 ml/2 gm Min
Gelling Time Instant
Gel Formation Index 50 Min

Note: Test as per IS 12446:2007.

How They Compare

Reference: Engineered Bentonite Solution chart

Parameter Smecbond™ Sandiron Plus®
Iron Foundry
Non-Ferrous
Economical ●●●
Sand-to-Metal Ratio Medium, High Low, Medium, High
Strength Related Properties ●●●
Thermal Durability ●●●
Casting Weight Reduction* ●●●
Reduced Sand-Related Defects ●●●
Good Peel-Off ●●●
Excellent Surface Finish ●●●

*Weight reduction depends on casting thickness, surface-to-volume ratio, degree of core grade of bentonite, type of molding machine, and geometry of components. This can range from 0%–3% of the present weight of the casting.

Form Supplied

Pale Yellow colored powder packed in 40 kg HDPE(High-Density Polyethylene) Bags

Bentonite application

Instructions for Use

Storage & Handling

Always ensure that the material is stored and used as per the method described in the MSDS(Material Safety Data Sheet) of the Product provided.

Shelf-Life

Five years from the date of packing.

Application

Can be used directly in the sand mixer for preparation of Molding sand.

Services

MPM’s highly experienced and well-qualified technical applications team is also available for domain know-how consulting in the application of Smecbond™ and Sandiron Plus®.

Downloads

Available documents:
Bentonite-Blend-Brochure.pdf

Bentonite Blend Brochure

File Type: PDF

Document: Product Brochures

Information - English - 07-07-2026 - 14.82 MB

PDF
INDIAN-BENTONITE.pdf

Indian Bentonite

File Type: PDF

Document: Technical Data Sheets

Information - English - 10-08-2026 - 0.58 MB

PDF
Product-Brochure.pdf

MPM Product Brochure

File Type: PDF

Document: Product Brochures

Information - English - 07-07-2026 - 52.72 MB

PDF

Ready to Choose the Right Bentonite Blend?

From economical medium-to-high ratio castings to premium low-ratio precision work, our technical applications team can recommend the right grade for your sand system.