The OB1 Multi-Surface Construction Sealant & Adhesive in grey, manufactured by Siroflex, is a versatile and high-quality product designed for various construction and industrial applications. With a unit quantity of 290ml, this sealant and adhesive is ideal for sealing and bonding multiple surfaces effectively. Its strong and durable formula ensures long-lasting performance, making it a reliable choice for both professional and DIY projects. Easy to apply and suitable for a wide range of materials, the OB1 sealant is a must-have for any construction site or industrial setting.