Provisional Technical Datasheet Features & Benefits Low odour formulation Excellent adhesion on plastics, metals and 15 minutes open time Outstanding strength on unprepared materials High toughness PERMABOND® TA4551 is a two-part, 2:1 low odour acrylic adhesive. It has been developed for the structural bonding of some nylon/polyamide grades without the need for any primers or additional surface treatments. TA4551 is also good for bonding plastics, composites and metals, and cures rapidly at room temperature, whilst being thixotropic (nonslump), allowing for vertical application. The adhesive is highly toughened, making it suitable for applications involving impact and vibration. Typical Physical Properties of Uncured Adhesive Typical Performance of Cured Adhesive Shear strength+ *Substrate failure was observed. **Unprepared. tNature of surface, surface preparation, glue-line thickness, thickness of substrates, pull speed, batch variation, cure time and temperature will all affect the shear strength measurement. Typical Curing Properties Ratio of use (volume) *Curing times on mild steel. tThe adhesive incorporates microbeads, allowing for a controlled minimum gap. 0 min 25 min 3 hours 6 hours 24 hours Time Aluminium Graph shows typical strength development at 23°C. Curing at higher or lower temperatures may affect cure speed. The information given and the recommendations made herein are based on our research and are believed to be accurate, but no guarantee of their accuracy is made. In every case we urge and recommend that purchasers before using any product in full-scale production make their own tests to determine to their own satisfaction whether the product is of acceptable quality and is suitable for their particular purpose under their own operating conditions. THE PRODUCTS DISCLOSED HEREIN ARE SOLD WITHOUT ANY WARRANTY AS TO MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR ANY OTHER WARRANTY, EXPRESS OR IMPLIED. No representative of ours has any authority to waive or change the foregoing provisions but, subject to such provisions, our engineers are available to assist purchasers in adapting our products to their needs and to the circumstances prevailing in their business. Nothing contained herein shall be construed to imply the non-existence of any relevant patents or to constitute a permission, inducement or recommendation to practice any invention covered by any patent, without authority from the owner of this patent. We also expect purchasers to use our products in accordance with the guiding principles of the Chemical Manufacturers Association’s Responsible Care® program. FOR PROFESSIONAL OR INDUSTRIAL USE ONLY. KEEP OUT OF REACH OF CHILDREN

Storage Temperature Lap shear specimens aged and tested at room temperature Provisional Technical Datasheet Surfaces should be clean, dry and grease-free before applying the adhesive. Surfaces may have traces of mould release-agent present - wipe with isopropanol (IPA) solvent and allow to fully evaporate before bonding. If bonding to metal: some metals such as aluminium, copper and its alloys will benefit from light abrasion with an emery cloth (or similar) to remove the oxide layer. Permabond® TA4551 can withstand higher temperatures for brief periods (such as for paint-baking and wave-soldering...