Adhesive & Sealants

Magnesium Hydroxide

Magnesium Hydroxide (Mg(OH)₂) is a halogen-free flame retardant active at 300–330°C, providing superior thermal stability, higher heat absorption, and a strong magnesium oxide barrier. It is used in adhesive and sealant formulations requiring high-temperatu...

Magnesium Hydroxide
Adhesive & SealantsMagnesium Hydroxide
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Advantages

Key Benefits

Why Magnesium Hydroxide is the preferred choice for adhesive & sealants formulations

01

Halogen-Free — Environmentally Safe

02

Active at 300–330°C for High-Temperature Applications

03

Superior Thermal Stability

Magnesium Hydroxide benefits Performance engineered for Adhesive & Sealants
04

High Heat Absorption & Smoke Suppression

05

Strong Magnesium Oxide Barrier Formation

06

Enhances Mechanical Properties as Functional Filler

Quality AssuredISO Certified
Lab TestedEvery Batch
Eco FriendlySustainable
Global DeliveryWorldwide
Product Grades

Product Grades

Comprehensive range of Magnesium Hydroxide grades for diverse industrial applications

1 Specialized Grades

Each grade is engineered for specific performance requirements in adhesive & sealants applications

Lab Verified
Quality Certified
Sample Available
Sealant Industrial Grade Quality Tested
Adhesive & Sealant Application Matrix

Application Areas

Application areas listed against Magnesium Hydroxide in the Adhesive & Sealant application matrix

Application intelligence Workbook-verified product and application mapping
Polyurethane (PU)
Use Area 01

Polyurethane (PU)

Role / FunctionFiller, Flame Retardant, Barrier

Application TypeSealant

Verified in Adhesive & Sealant matrix
Product Sheet Applications

Applications

Applications listed for Magnesium Hydroxide in the Adhesive & Sealant product sheet

Polyurethane Sealants
01

Polyurethane Sealants

Magnesium Hydroxide
Sealants & Caulks
02

Sealants & Caulks

Magnesium Hydroxide
Epoxy Adhesives
03

Epoxy Adhesives

Magnesium Hydroxide
Polysulphide Sealants
04

Polysulphide Sealants

Magnesium Hydroxide
Construction Adhesives
05

Construction Adhesives

Magnesium Hydroxide
Automotive Adhesives
06

Automotive Adhesives

Magnesium Hydroxide

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Related Product Markets

Markets

Other website markets with a verified Magnesium Hydroxide product-family listing

Product Support

Frequently Asked Questions

Common questions about Magnesium Hydroxide in adhesive & sealants applications

Magnesium hydroxide is a halogen-free flame retardant that activates at 300–330°C. It is used in adhesives and sealants to provide high-temperature flame retardancy, smoke suppression, and thermal stability.

At 300–330°C, Mg(OH)₂ decomposes and releases water, absorbing heat, diluting flammable gases, and forming a protective magnesium oxide barrier layer that protects the substrate from further combustion.

Mg(OH)₂ is active at higher temperatures (300–330°C) compared to ATH (200–220°C), making it more suitable for adhesive and sealant systems processed at higher temperatures or requiring high-temperature fire resistance.

Yes. Mg(OH)₂ is halogen-free, non-toxic, and environmentally safe, making it fully compliant with stringent environmental regulations such as RoHS and REACH.

Yes. Combining Mg(OH)₂ (Super Mag 150 UC) with ATH (AL FR 9) provides multi-stage flame retardancy across a wider temperature range — from 200°C to 330°C — for comprehensive fire protection.

At appropriate loading levels, Mg(OH)₂ can contribute to mechanical stiffness and chemical stability in adhesive systems without adversely affecting elongation or flexibility when properly formulated.

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See It In Action

Watch how 20 Microns' Magnesium Hydroxide supports real-world industrial applications.

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