Epoxy for mag P7 Mod?
- Thread starter Zeva
- Start date
Help Support Candle Power Flashlight Forum
you could try it out, but it is not made to conduct heat through it(epoxy) into a heatsink. Your best bet is arctic alumina, you can find it for sale in the market place by Photon Phanatic or most computer stores like frys.
you can try it but its not worth burning out a possible $30 led for $6 in epoxy.
you can try it but its not worth burning out a possible $30 led for $6 in epoxy.
+1
Get the right stuff. This would not be a good place to cut corners in my opinion. It seems VERY unlikely that the combination of the epoxy you pictured and thermal compound would result in a working light. Even using quality products like AA if you get too thick of a layer the heat will not transfer well enough to cool the led and the result is
:mecry:. For lights that dont have anything other than the epoxy to hold them in place (like my P7 m*g) I recommend Arctic Alumina 2 part epoxy. For lights that have a reflector that aids in holding the emitter down firmly ( like D26 style drop-ins) I use Arctic Silver.
Get the right stuff. This would not be a good place to cut corners in my opinion. It seems VERY unlikely that the combination of the epoxy you pictured and thermal compound would result in a working light. Even using quality products like AA if you get too thick of a layer the heat will not transfer well enough to cool the led and the result is
:mecry:. For lights that dont have anything other than the epoxy to hold them in place (like my P7 m*g) I recommend Arctic Alumina 2 part epoxy. For lights that have a reflector that aids in holding the emitter down firmly ( like D26 style drop-ins) I use Arctic Silver.
Last edited:
Justin Case
Flashlight Enthusiast
- Joined
- Mar 19, 2008
- Messages
- 3,797
If you plan on using the Arctic Silver thermal compound under the LED and the regular epoxy around the LED to secure it, that should work fine. In fact, that should also give you the maximum thermal conductivity. The various Arctic xx thermal compounds have better thermal conductivity than the Arctic xx thermal epoxies.
Mixing the AS5 compound into regular epoxy also will work. The general advice is to mix the two in a 1:1 weight ratio. The trick is knowing what the densities of AS5 vs epoxy are. You can calculate AS5 density from this statement from the Arctic web site: At a layer 0.003" thick, the 3.5 gram tube will cover approximately 16 square inches. A Google search will give you the density for a typical epoxy. Knowing the densities, you then mix the appropriate volume ratios to give you a 1:1 weight ratio. For example, if AS5 is 3X as dense as epoxy, then mix a 1:3 volume ratio of AS5 to epoxy to get the desired 1:1 weight ratio.
If you are looking for a cheap way to make thermal glue, you can mix aluminum nitride particles with regular epoxy. If the AlN comprises about 2/3 of the total volume, you should get thermal conductivity comparable to Arctic Silver epoxy.
Mixing the AS5 compound into regular epoxy also will work. The general advice is to mix the two in a 1:1 weight ratio. The trick is knowing what the densities of AS5 vs epoxy are. You can calculate AS5 density from this statement from the Arctic web site: At a layer 0.003" thick, the 3.5 gram tube will cover approximately 16 square inches. A Google search will give you the density for a typical epoxy. Knowing the densities, you then mix the appropriate volume ratios to give you a 1:1 weight ratio. For example, if AS5 is 3X as dense as epoxy, then mix a 1:3 volume ratio of AS5 to epoxy to get the desired 1:1 weight ratio.
If you are looking for a cheap way to make thermal glue, you can mix aluminum nitride particles with regular epoxy. If the AlN comprises about 2/3 of the total volume, you should get thermal conductivity comparable to Arctic Silver epoxy.
Last edited:
