ARALDITE® 2028-1 A/B

• Transparent
•  Fast curing
• UV stable
•  Suitable for bonding a variety of metal and plastic substrates

• Pretreatment: The strength and durability of a bonded joint are dependent on proper treatment of the surfaces to be bonded. At the very least, joint surfaces should be cleaned with a good degreasing agent such as acetone, isopropanol (for plastics) or other proprietary degreasing agents in order to remove all traces of oil, grease and dirt. Low grade alcohol, gasoline (petrol) or paint thinners should never be used. The resin and hardener should be blended until they form a homogeneous mix. ARALDITE® 2028-1 is available in cartridges incorporating mixers.
• Application of adhesive: The resin/hardener mix may be applied manually or robotically to the pretreated and dry joint surfaces. Huntsman's technical support group can assist the user in the selection of a suitable application method as well as suggest a variety of reputable companies that manufacture and service adhesive dispensing equipment. A layer of adhesive 0.05 to 0.10 mm thick will normally impart the greatest lap shear strength to the joint. Huntsman stresses that proper adhesive joint design is also critical for a durable bond. The joint components should be assembled and secured in a fixed position as soon as the adhesive has been applied.
• Equipment Maintenance: All tools should be cleaned before adhesives residues have had time to cure. The removal of cured residues is a difficult and time-consuming operation. If solvents such as acetone are used for cleaning, operatives should take the appropriate precautions and, in addition, avoid skin and eye contact. 

Cure times to reach minimum shear strength

• ARALDITE® 2028-1 A/B structural adhesive should be stored in a dry place, in the sealed original containers, at temperatures between 2°C and 40°C (36°F and 104°F).
• Under these storage conditions, the products have a shelf life of 730 days (from date of manufacture).
• The expiry date is indicated on the label.
• The products should not be exposed to direct sunlight.