The shear stress, strain, and modulus of styrene-butadiene rubber adhesive with and without kaolinite additive were studied on the aluminum surfaces to know the convenience of it in aluminum industries. The adhesives were cured at temperature of 200°C for different curing times (10, 30, 40, and 50？min) with and without 50 wt% kaolinite additives. The result found was good adhesion for styrene butadiene rubber adhesive without kaolinite additive and very poor adhesion with kaolinite additive. It was found that the maximum shear stress of adhesive without kaolinite additive was 2.3？kN/m2 with elongation of 0.23% and modulus of 100？kN/m2 at curing temperature of 200°C for period of time of 40？min. From images of adhesives after breaking of samples, the adhesive without additives failed because both adhesion and the cohesive energies of adhesive were failure; meanwhile, the failure of adhesive with kaolinite additive was due to failure in cohesive energy only. 1. Introduction Rubber-based adhesives, also called elastomeric adhesives, are widely used in industrial and household applications. In fact, about one-third of the adhesives used in the world are made from natural or synthetic rubbers. Some of the elastomeric adhesive systems showing industrial importance in recent years are the following: (1) pressure-sensitive tapes and labels; (2) construction adhesives; (3) contact adhesives; (4) hot-melts packaging and bookbinding adhesives; (5) high-strength structural applications for aircraft, automotive, and construction [1]. The previous studies have included that the adhesive strength variation in SBR rubber/polyurethane adhesive joints was consistent with the variation in surface chemistry, wetability, and topography of the treated SBR rubber [2]. The high-performance SBR compound modified asphalt can be made with the addition of polyphosphoric acid (PPA), styrene-butadiene rubber (SBR), and sulfur. The effects of PPA, SBR, sulfur on the physical properties, the dynamic rheological properties, the high-temperature storage stabilities, the morphologies and the internal structures of asphalts were studied [3]. Polymer modification of asphalt binders has increasingly become the norm in designing optimally performing pavements, particularly in the United States, Canada, Europe, and Australia. Specific polymers that have been used include SBR [4]. The effect of the bulk deformation on rubber adhesion, that is, effect on the surface free energy of two rubber compounds filled with various loading fractions of carbon black, natural rubber (NR), and
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