Recently, there were several clients asked us about the glue for our flexible LED strip. There’re 3 kinds glues, they are epoxy resin glue, PU (polyurethane) glue and silicone glue. But it seems not all clients understand them. Here is a description.
Firstly, we never use PU or epoxy glue, all the waterproof strips are guaranteed with high quality standard silicone glue.
1, The epoxy resin glue has a large share on the market because of its low price, good maneuverability and lower toxicity. But There are fatal flaw in its molecular structure. It is easy to turn yellow. Yellow degeneration resistance is poor and low or high temperature resistance is poor. When put the epoxy resin glue led strip work under the -30℃, it will make the led strip decline its flexible and tender, and easy to damage, which will cause many inconvenient during the led strip light working.
2, The PU (polyurethane) glue is better than epoxy resin glue because of its good yellow degeneration resistance, good Low temperature resistance, but not resistant to high temperature. The price is higher than epoxy glue but with toxicity. When solidify the PU glue, it will lead to some low molecular compounds, which is toxicity, it is bad for health with the bad smell.
3, Silicon glue, it including all the advantages of PU glue and epoxy glue, which with good heat resistance and good low temperature resistance -50°~ 300°, good yellow degeneration resistance and low toxicity. The glue will not change yellow for use a long time and also good smell. Now all quality suppliers are use silicon glue for led strip light.
