3M Adhesion Promoter 4298 is a detectable primer sponge packet used for most low surface energy plastics. This would include common low surface energy plastics used for automotive dash and interior trim applications (TPO, PPO, PP, PC, PC + ABS, etc). Sponge Applicator Packet is 2.5cc per Packet (3 pack). Detectable by UV light. One packet covers approximately 150 square inches of substrate at the recommended coating thickness. Also available in larger size .47fl oz/14ml (equivalent to 6 sponge packets) marker/pen with valve action reversible applicator tip, search ASIN: B0953S3F5F. WARNING: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.