Made with Xara Web Designer Exhaust_stack Completed Fabricated Pipework Sitemap Hot Plural Feed Pump Specialist 100% solids coatings require specialist pumps to apply these coatings and linings; the hot plural feed pump heats up the base and activator products prior to pumping separately to a mixing head just prior to the spray gun (or in the case of the stinger, the spinning head).  The two components when mixed have a very limited pot life in some cases as low as one to two minutes.