Chemical Set Adhesives

Sauereisen Low Expansion Cement No.29

Non-corrosive and compatible for applications with ceramics, glass and most metals.

Characteristics

Withstands temperatures to 1550°F (843°C)
Insulates electricity
Tolerant to cryogenic conditions
Heat conductive and thermal shock resistant
Small particle size allows for good flow characteristics
Resists oil, solvents and most acids (except hydrofluoric)
Adheres to metal, ceramics, glass and other surfaces
Odourless
Hardens by chemical set even in confined areas
More economical than organics
Safe to use/non-toxic

Recommended for

Assembling
Elements
Embedding
Insulating
Resistors
Sealing

Description

Low Expansion Cement No.29 is an inorganic cement used for embedding heating elements, insulating thermocouples, coating resistors and coils, and mechanically sealing parts where high resistance to electricity, chemicals and thermal shock is required. A strong resistance to cryogenic conditions makes No.29 a common product for aerospace applications. No.29 adheres to glass, porcelain, ceramics, metals and other surfaces.

Physical Properties

Absorption	10-12%
Coefficient of thermal expansion	4.6 x 10^-6/°F (8.28 x 10^-6/°C)
Colour	Tan
Compressive strength	3,900 psi (274 kg/cm²)
Density	141 pcf (2.26 gm/cm³)
Dielectric constant	5.0-7.0
Dielectric strength @ 70°F (21°C)	25.0 to 51.0 Volts/mil (980 to 2000 Volts/mm)
@ 750°F (398°C)	12.5 to 25.0 Volts/mil (490 to 980 Volts/mm)
@ 1475°F (801°C)	1.3 Volts/mil (51 Volts/mm)
Maximum service temperature	1550°F (843°C)
Shrinkage	0.50%
Tensile strength	300 psi (21.09 kg/cm²)
Thermal conductivity at 500°F (260°C)	9.8-5.2 BTU.in/ft². hr.°F (3.3 – 1.76 x 10^-3 Cal.cm/cm².sec.°C)
Volume resistivity @ 70°F (21°C)	10⁷ – 10⁹ ohm-cm
@ 750°F (398°C)	10⁴ – 10⁶ ohm-cm
@ 1475°F (801°C)	10² – 10³ ohm-cm

Physical properties were determined on specimens prepared under laboratory conditions using applicable ASTM procedures. Actual field conditions may vary and yield different results; therefore, data are subject to reasonable deviation. Data should not be used for specification purposes.

Application / Instructions

MIXING – No.29 is a two-part, chemical-setting cement consisting of a powder and liquid which are mixed together as used. No.29 Powder should be thoroughly remixed before using. Weigh out 80% of No.29 Powder and 20% of No.29 Liquid. Place liquid in a clean mixing container and gradually add powder while mixing. Continue mixing until a smooth uniform consistency is obtained. Mixing may be done with a slow-speed mixer or by hand with a spatula.

No.29 may be mixed to a thinner consistency by regulating the amount of Liquid used; however, the use of excess Liquid will reduce mechanical strength, increase shrinkage and delay set time. Failure of cement to adhere indicates setting has begun – discard cement. Do not attempt to retemper by adding more liquid.

APPLICATION – Porous substrates may require dampening with No.29 Liquid before applying the mixed cement.

Setting / Curing

Low Expansion Cement No.29 hardens with an internal chemical-setting action in 18-24 hours at ambient temperatures. Working time of No.29 when powder is mixed with liquid is approximately 30 minutes at 21°C (70°F). If it is desired to accelerate the cure, oven drying at 82°C (180°F) can be used. Avoid steaming while drying. If the cement will be exposed to elevated temperatures, contact Glassbond for appropriate drying schedule recommendations.

If high humidity resistance is required and it is impractical to fire cement, a moisture resistant lacquer or silicone coating should be applied to the exposed surfaces.

Cleaning

All equipment should be cleaned with soap and water before No.29 cures. If removal is required after cure, consult Glassbond.

Packaging

This material is supplied in various types and sizes of containers. Please contact Glassbond Sales for further details.

Shelf Life

No.29 powder has a shelf life of twelve (12) months when stored in unopened, tightly sealed containers in a dry location at 21°C (70°F). If there is doubt as to the quality of the material, consult Glassbond.

Caution

Consult the Material Safety Data Sheets and container label caution statements for any hazards in handling this material.

Warranty

We warrant that our goods will conform to the description contained in the order and that we have good title to all goods sold. WE GIVE NO WARRANTY, WHETHER OF MERCHANTABILITY, FITNESS FOR PURPOSE OR OTHERWISE, EXPRESS OR IMPLIED, OTHER THAN AS EXPRESSLY SET FORTH HEREIN. Users shall determine the suitability of the product for intended application before using.

Manufactured under licence from Sauereisen Pittsburgh PA.

SAFETY DATA

Safety Data according to regulation (EC) No1907/2006, 1272/2008(CLP) & 453/2010

1. IDENTIFICATION OF THE SUBSTANCE/ MIXTURE AND OF THE COMPANY/UNDERTAKING

1.1 Product Identifier

Product name

GLASSBOND SAUEREISEN LOW EXPANSION CEMENT No.29

REACH Notes

Mixture – Substances contained in this product that are not classified as hazardous have been/will be registered for UK/EU REACH at the appropriate time.

1.2 Relevant identified uses of the mixture and uses advised against.

Identified use	High temperature adhesive and sealant
Uses advised against	No other uses

1.3 Details of the supplier of the safety data sheet

Company identification	Glassbond (NW) Ltd West Side Industrial Estate Jackson Street St Helens Merseyside WA9 3AT United Kingdom
Telephone	+44 (0)1744 730334
Fax	+44 (0)1744 451661
Email	technical@glassbond.co.uk
Emergency Telephone	+44 (0)1744 730334 (GMT, English spoken, Mon-Fri 08:30-16:30)

2. HAZARDS IDENTIFICATION*

2.1 Classification of the mixture: calculation method
Regulation (EC) No. 1272/2008(CLP)

Physical / Chemical	Not Classified
Human Health	Acute toxicity 4 (oral, skin, inhalation)
Environmental	Not Classified

2.2 Label elements According to Regulation (EC) No. 1272/2008(CLP)

GHS07 GHSO7

Acute toxicity Oral 4
Acute toxicity Skin 4
Acute toxicity Inhalation 4

Signal Word(s)	Danger
Hazard Statement(s)	H302 – Harmful if swallowed / Acute Tox 4 H312 – Harmful in contact with skin / Acute Tox 4 H332 – Harmful if inhaled / Acute Tox 4
Precautionary Statement(s)	P261 – Avoid breathing dust P280 – Wear protective gloves / protective clothing / eye protection / face protection P312 – Immediate call a POISON CENTRE or doctor if you feel unwell

2.3 Other Hazards
PBT: This mixture contains no substances considered as PBT
vPvB: This mixture contains no substances considered as vPvB

2.4 Additional Information
For full text of H/P phrases see section 16 if not written out in full above.

3. COMPOSITION/INFORMATION ON INGREDIENTS*

3.1 Substances (This product is a mixture according to EU legislation)

3.2 Mixture of inorganic powders

Sodium silico fluoride
(%w/w 10-20)

CAS / EC / REACH No
16893-85-9 / 240-934-8 / 01-2119519245-43-0002

CLP EC 1272/2008
H331: Acute Tox 3 (inhalation)
H311: Acute Tox 3 (dermal)
H301: Acute Tox 3 (oral)

3.3 Additional Information

For full text of H/P phrases see section 16 if not written out in full above.

4. FIRST AID MEASURES

4.1 Description of first aid measures

General Advice	Take off contaminated clothing and wash before re-use (P362). Take care not to contaminate unaffected areas.
Inhalation	IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing. (P304+P340)
Eyes	IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. (P305 + P351 + P338) If eye irritation persists: Get medical attention (P337+P313)
Skin	IF ON SKIN: Wash hands thoroughly after handling (P264) If skin irritation or rash occurs get medical attention (P333+P313)
Ingestion	IF SWALLOWED: Rinse mouth (P330). Call a POISON CENTRE or doctor if you feel unwell (P301+P312). Show this safety data sheet.

4.2 Most important symptoms and effects, both acute and delayed

Symptoms	Eye contact- May cause temporary eye irritation.
Risks	No information available.

4.3 Indication of any immediate medical attention and special treatment needed

Treatment

Treat according to symptoms (decontamination, vital functions), no known specific antidote.

5. FIRE FIGHTING MEASURES

5.1 Extinguishing media
Suitable: CO₂ or dry chemical spray, water spray may help to reduce the temperature and extinguish flames for surrounding materials.
Unsuitable: High pressure water jet.

5.2 Special hazards arising from the mixture
The powder will not burn but the packaging is combustible.

5.3 Advice for fire fighters
Use full protective clothing and self-contained breathing apparatus.

Further information: The degree of risk is governed by the burning substance and the fire conditions. Contaminated extinguishing media must be disposed of in accordance with official regulation.

6. ACCIDENTAL RELEASE MEASURES

6.1 Personal Precautions, protective equipment and emergency procedures
Use personal protective clothing.

6.2 Environmental Precautions
Prevent contamination of soil, drains and surface waters. Do not discharge contaminated water/ fire-fighting water into drains/ surface water/ groundwater.

6.3 Methods and material for containment and cleaning up
Collect spillage by sweeping or industrial vacuum cleaner. keep in suitable closed container for disposal

6.4 Reference to other sections
For personal protection see section 8 and Disposal section 13

7. HANDLING AND STORAGE

7.1 Precautions for safe handling

Advice on safe handling	Avoid the formation and deposition of dust. Use only outdoors or in a well-ventilated area (P271). For PPE see section 8. Take off contaminated clothing and wash before re-use (P362).
Advice on protection against fire and explosion	Normal measures for preventive fire protection Take precautionary measures against static discharge if using plastic packaging.

7.2 Conditions for safe storage, including any incompatibilities

Store in a well-ventilated place.
Keep containers tightly closed. (P403+P233)
Keep cool and dry, away from direct sunlight or heat.
Protect from temperatures below: Not applicable
Protect from temperatures above: 40 °C
Suitable storage materials: Original containers.
Higher temperatures and humidity will reduce the shelf life of the product and may cause the powder to form lumps. The powder will also be difficult to mix into a paste. Under normal conditions (21ºC) a shelf life of 12 months or more is possible.

7.3 Specific End use(s)

As per section 1.2

8. EXPOSURE CONTROLS / PERSONAL PROTECTION

8.1 CONTROL PARAMETERS

8.1.1 Occupational Exposure Limits: OEL (Occupational Exposure Standard OES)

Dust	mg/m³ / ppm	note
TWA	– / –	(EH40 UK) OES 8hr
TWA	– / –	(EH40 UK)
TLV-TWA	– / –	(ACIGH)
STEL	– / –	(EH40 UK)
TWA	2.5 / –	(OSHA)
TWL	– / –
STEL	– / –

8.1.2 Biological limit value
Not available

8.1.3 PNECs and DNELs
Not available

8.2 EXPOSURE CONTROLS

8.2.1 Appropriate engineering controls
Effective exhaust ventilation system.

8.2.2 Personal Protective Equipment:

Eye / face Protection	Tightly fitting safety goggles (e.g., EN166).
Skin Protection / Hand	Gloves: Chemical resistant gloves (e.g., EN374) Butyl rubber: 0.7 mm coating thickness. Nitrile rubber: 0.4 mm coating thickness. Check with PPE manufacturer. Replace immediately if signs of degradation are observed. Wear closed work clothing.
Other	Wear closed work clothing
Respiratory Protection	In the case of insufficient ventilation or severe dusts Cartridge: e.g., EN143 Type P-S (check with PPE manufacturer)
Hygiene measures	General industrial hygiene practice.

8.2.3 Environmental exposure controls
Local exhaust ventilation and take precautionary measures against static discharge.

9. PHYSICAL & CHEMICAL PROPERTIES

9.1 Information on basic physical and chemical properties

Appearance	Fine powder
Odour	None
pH Value	Not Applicable
Melting point / Freezing point	Not Applicable
Initial Boiling Point / Range	Not Applicable
Flashpoint °C	Not Applicable
Evaporation Rate	Not Applicable
Flammability (solid/gas)	Not Applicable
Upper Explosive Limit	Not Available
Lower Explosive Limit	Not Available
Vapour Pressure	Not Applicable
Vapour Density (AIR=1)	Not Applicable
Colour	Cream
Odour Threshold ppm	Not Available
Relative Density	2.7 g/ml
Solubility in water @20°C	14g/100g
Partition Coefficient (n-octanol/water)	Not Available
Auto Ignition Temperature	Not Available
Decomposition Temperature °C	Not Available
Viscosity mPa.s @25°C	Not Applicable
Explosive Properties	Not Available
Oxidizing Properties	Not Oxidising

10. STABILITY AND REACTIVITY

10.1 Reactivity	Stable under normal conditions.
10.2 Chemical Stability	Stable under recommended storage and handling conditions.
10.3 Possibility of hazardous reactions	No dangerous reaction known under conditions of normal use.
10.4 Conditions to avoid	No decomposition if stored and applied as directed.
10.5 Incompatible materials	Incompatible with strong acids, alkaline materials, iron containing materials. It may react with strong mineral acids to liberate hydrogen fluoride or hydrofluoric acid which are highly toxic and corrosive.
10.6 Hazardous Decomposition Products	No hazardous decomposition products if stored and handled as prescribed/ indicated.

11. TOXICOLOGICAL INFORMATION

11.1 Information on toxicological effects of the mixture

Acute Toxicity	Contains components that are hazardous by the following routes: skin, eye, inhalation.
LD⁵⁰ Oral Toxicity – Mouse LD⁵⁰ Oral Toxicity – In Rats LD⁵⁰ Dermal Toxicity – Rabbits LC⁵⁰ INHL Toxicity – Rats LD⁵⁰ Dermal Toxicity – Rabbits LC⁵⁰ Oral Toxicity – In Rata LD⁵⁰ Dermal Toxicity – Rats	70 mg/kg – Sodium silicofluoride 125 mg/kg – Sodium silicofluoride 500 mg/kg – Sodium silicofluoride mg/kg mg/kg mg/kg mg/kg
Skin corrosion/ irritation	May cause irritation.
Serious eye damage / irritation	May cause irritation.
Respiratory or skin sensitisation	Not classified.
Germ cell mutagenicity	Not classified.
Carcinogenicity	–
Reproductive toxicity	Not classified.
Specific Target Organ Toxicity (Repeated Exposure)	Not classified.
Specific Target Organ Toxicity (Single Exposure)	Not classified.
Aspiration hazard	Not classified.

11.2 Other information

Continuous or intermittent exposure to inorganic fluorides can lead to appreciable accumulation of fluoride in bone, and, to development of osteosclerosis and other bone changes.

12. ECOLOGICAL INFORMATION

12.1 Toxicity
LL⁵⁰ Fish (96hr)	mg/l – Brachydanio rerio
EC⁵⁰ Invertebrates (48hr)	mg/l – Daphnia magna
EL⁵⁰ Algae (72hr)	mg/l – Selenastrum capricorntum
Sodium silicfluoride
LL⁵⁰ Fish (96hr)	37.5 mg/l – Lepomis macrochirus
EC⁵⁰ Invertebrates (48hr)	35.4 mg/l – Daphnia magna
EL⁵⁰ Algae (72hr)	18.5 mg/l – Selenastrum capricorntum
Microorganisms/ effect upon activated sludge EC⁵⁰ Bacteria (3.0 hr)	mg/l – Activated sludge, domestic

12.2 Persistence and degradability	Not biodegradable.
12.3 Bioaccumulative potential	Not available.
12.4 Mobility in soil	Sinks in water. A small percentage (~30%) is water soluble. If the product enters soil, it will be mobile and may contaminate groundwater.
12. 5 Results of PBT and vPvB assessment	PBT: This mixture contains no substances considered as PBT. vPvB: This mixture contains no substances considered as vPvB
12. 6 Other adverse effects	The inhibition of the degradation activity of activated sludge is not anticipated when introduced to biological treatment plants in appropriate low concentrations. Do not release untreated into natural waters. This product has not been tested. The statement has been derived from products of a similar structure and composition.

13. DISPOSAL CONSIDERATION

13.1 Waste Treatment Methods
The preparation must be disposed of by special means. Dispose by landfill via a licensed waste disposal contractor in accordance with local and national regulations.

Contaminated packaging should be emptied as far as possible, they can then be recycled after being thoroughly cleaned by a licensed contractor. Labels must not be removed from containers until they have been cleaned. Packaging materials that are not contaminated should be treated as household waste or as recycling material.

13.2 Additional Information
The UK Environmental Protection (Duty of Care) regulations (EP) and amendments should be noted (United Kingdom) Dispose of contents/ container according to the end user disposal procedure (P501)

14. TRANSPORT INFORMATION

14.1 UN Number ADR RID IMDG IATA ADN	Not Classified.
14.2 Proper Shipping Name ADR RID IMDG IATA ADN	Not Classified.
14.3 Transport Hazard Class ADR RID IMDG IATA ADN	Not Classified.
14.4 Packing Group ADR RID IMDG IATA ADN	Not Classified.
14.5 Environmental Hazards ADR RID IMDG IATA ADN	Not Classified.

14.6 Special Precautions for user
Not classified as dangerous in the meaning of transport regulations.

14.7 Transport in bulk according to Annex II of MARPOL 73/78 and the IBC code
Not Applicable

15. REGULATORY INFORMATION

15.1 Safety, health and environmental regulations/legislation specific for the mixture

EU Legislation Commission Regulation (EC) No 474/2014 of 8th May 2014 amending Annex XVII to Regulation (EC) No 1907/2006
Commission Regulation (EC) No 944/2013 of 2nd October 2013 (5th ATP) amending Regulation (EC) No 1272/2008 on classification, labelling and packaging of substances and mixtures.
Waste Framework Directive 2008/98/EC

Employment restrictions: Observe employment restrictions for young people, for child bearing mothers/ nursing and for women of child-bearing age.

15.2 Chemical Safety Assessment
Assessed to be not PBT/vPvB.

16. OTHER INFORMATION

Sections Revised: 2
Removal of Section 2.1.2
Supersedes date 13/01/2022

Legend

PBT	Persistent, Bioaccumulative and Toxic
vPVB	very Persistent and very Bioaccumulative

Data Sources
Supplier Information

Other hazard and risk phrases listed in this MSDS
H301 Toxic if swallowed; H311 Toxic in contact with skin; H331 Toxic by inhalation

Training advice
General industrial hygiene practice. Do not eat, drink or smoke when using this product (P270)
Manual handling

Further information

This information relates only to the specific material designated and is to the best of the company’s knowledge and belief, accurate and reliable as of the date indicated. However, no warranty guarantee or representation is made to its accuracy, reliability or completeness and without acceptance of liability for loss or damage attributable to reliance thereon as conditions of use lie outside our control. Users should always carry tests to establish the suitability of any products for their intended applications. No statements shall be incorporated in any contract unless expressively agreed in writing or construed as recommending the use of any product in conflict of any patent. All goods are supplied subject to Glassbond Ltd’s General Conditions of Sale.

Correct as of 29 Mar, 2025

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