Polyurethane adhesive 677

for plasticsfoamfor wood

SikaMelt®-677 is a reactive polyurethane hot melt adhesive designed to bond various substrates and mainly used for sandwich panel bonding. It cures on exposure to atmospheric humidity. SikaMelt®-677 meets the requirements set out by the International Maritime Organization. PRODUCT BENEFITS Very long open time High green strength IMO approved Broad adhesion range Very good heat resistance after moisture curing Very good ageing resistance Areas of Application SikaMelt®-677 is suitable for permanent bonding of polar plastics as well as for wood, foam, textiles, painted and primed steel. Non polar plastics like PP and PE can be bonded after proper physical pre-treatment. It is used for interior trim lamination as well as for Sandwich Panel applications. This product is suitable for professional experienced users only. Test with actual substrates and conditions have to be performed to ensure adhesion and material compatibility. Surface preparation Surfaces must be clean, dry and free from grease, oil and dust. Based on the surface and type of material, a physical or chemical pre-treatment might be required. Type of pre-treatment must be determined by tests. For metals best results are achieved, if substrates are heated up between 40 and 60 °C prior the assembling process. Application With adequate processing equipment SikaMelt®-677 can be applied as film, dot, bead or spray application. For automated applications a suitable filter system is required. To meet the required application properties the adhesive viscosity can be adjusted by changing the application temperature (see table Typical Product Data).