ARALDITE® 219S / HARDENER 219S

• Easy to mix and apply
• Cures at temperatures down to 10°C
• Cures rapidly to form flexible bonds
• Transparent glue line
• Cures with negligible shrinkage.

Cures very rapidly to provide good adhesion.

Preparation
It is essential that the correct mixing ratio be used and that the resin and hardener are thorougly mixed together before use. Inaccuracies will result in a lowering of the physical properties of the cured system and, if the error is sufficiently great, the system may not cure satisfactorily.
Surface Pretreatment
To obtain completely satisfactory and durable joints, the surfaces to be bonded must be properly pretreated. All traces of dirt oil and grease must be removed using a solvent, such as Eposolve 70 (Huntsman Advanced Materials) or acetone etc; alcohol, petrol or paint thinners should never be used Maximum bond strength is obtained by mechanically abrading or chemically etching the surface to provide a better key for the adhesive. Mechanical abrading must be followed by a second, thorough degreasing treatment. 
Mixing
Blend both components together well to achieve a homogenius mix. Mixing of the components can be done at room temperature.
Curing
To determine whether crosslinking has been carried to completion and the final properties are optimal, it is necessary to carry out relevant measurements on the actual object or to measure the glass transition temperature. Different gel and cure cycles in the customer’s manufacturing process could lead to a different degree of crosslinking and thus a different glass transition temperature.

Mechanical and Physical Properties (guideline value)

Determined on standard test specimen at 23°C. Cured for 24h/RT + 6h/80°C
Glue Line Colour                                        :                    TM02    :    Transparent Yellow
Tensile Bond Strength (AL/AL) at 25°C      :                    TM48 12  : 15 N/mm²
Tensile Bond Strength (Wood/Wood)         :                     TM48       : Wood fails
Maximum Operating Temperature    :                                               :45°C 
Water absorption (cold, 10 days)                :                    TM35 2.1 :  2.5% by weight
(1N/mm2 = 1 MPa = 145 psi)
*Typical figures only, will vary with time and temperature.

• Mandatory and recommended industrial hygiene procedures should be followed whenever our products are being handled and processed.
• First Aid - Contamination of the eyes by resin, hardener or casting mix should be treated immediately by flushing with clean, running water for 10 to 15 minutes. A doctor should then be consulted.Material smeared or splashed on the skin should be dabbed off, and the contaminated area then washed and treated with a cleansing cream.A doctor should be consulted in the event of severe irritation or burns. Contaminated clothing should be changed immediately.

Store the components in a dry place at RT, in tightly sealed original containers. Under these conditions, the shelf life will correspond to the expiry date stated on the label. After this date, the product may be processed only after reanalysis. Partly emptied containers should be tightly closed immediately after use.

At the workplace, safety precautions are crucial to ensure employee well-being. Protective clothing, including essential gloves and recommended arm protectors, should be worn, along with goggles or safety glasses. A respirator or dust mask is advised, while skin protection involves applying barrier cream before work and nourishing cream after washing. In case of contamination, skin should be dabbed with absorbent paper, washed with warm water and alkali-free soap, and dried with disposable towels avoiding solvents. To maintain cleanliness, workbenches should be covered with light-colored paper, and disposable beakers used. Spills should be soaked up with sawdust or cotton waste and disposed of in plastic-lined bins. Additionally, the workshop air should be renewed 3 to 5 times an hour, and exhaust fans should be used to prevent inhalation of vapors.