REACT GP The REACT GP adhesive and glue range contains a thick, medium, thin viscosity adhesive, and a low stain activator formulated for uPVC applications. Explore the REACT products, in the range below for a more in-depth look at each product, including downloadable Technical Information with typical guidance for each product and the Safety Datasheet for health and safety guidance. Alternatively for a quick overview of each product in the complete GP range please see our General purpose Product Guide.