The perfect accompaniment to Porvair precision engineered assay plates are Porvair colour-coded thermal seals. These easy to use thermal seals work with all commercially available heat sealers that take pre-cut strip seals. They are printed in five different colours and marked “This way up” to ensure easy selection of the right gauge of seal and correct positioning on the microplate. Seals are compatible with most heat sealers from: Thermo-Fisher, Abgene, Agilent, Caliper, 4titude, Fluidx, Porvair, KBiosystems and Matrix. Each aluminium foil is spray-coated with an acrylic varnish that is solvent resistant and will not contaminate your samples. It also makes an excellent permanent weld seal to our polystyrene and polypropylene microplates. The easily peelable foil is actually a laminate of aluminium and polyester for durability and strength, while remaining easy to remove. A sample pack of foils is available on request from Porvair Sciences for you to determine the optimum seal for your application. Porvair colour-coded optically clear seals come in two gauges, both printed black “This way up” for ease of use. The thinner gauge gives the best optical results and is easily removed. The thicker material, while remaining clear after heat sealing, is more suitable for long-term cold storage down to -20C.