Multibond SMX35 is a high quality, single component, permanently flexible joint sealant. Perfect for internal & external applications. Based on SMX� Polymer Multibond SMX35 has a �Shore A� hardness of 35 and can accommodate movement of � 20 %. Multibond SMX35 has excellent UV resistance, elasticity and can be sanded and painted with most types of paint. Once cured forms a strong, flexible, waterproof seal and bonds to the widest range of substrates. Multibond SMX35 can be used for damp and wet surfaces.