<p>I am making a bed for my 3D printer. I have bought a silicon heater (31x31 cm) and I want to glue it to my custom aluminum bed. The tape that it had from factory was bad, so I removed it. I want to glue it to the aluminum and I don't know what type of adhesive to use, I was thinking gasket glue with silicon, but I think that it will have bad thermal conductivity. I found <a href="https://www.annapol.eu/product_info.php?products_id=137997&amp;language=en" rel="nofollow noreferrer">this product, a silicon based,  heat transferring paste</a>, but I think that it will not stick good. What is a good adhesive for this purpose?</p>

[{'answer_id': 14954, 'author': 'Trish', 'author_id': 8884, 'author_profile': 'https://3dprinting.stackexchange.com/users/8884', 'pm_score': 1, 'selected': True, 'text': '<p>Heat Transfer PAste will not work as a gluing agent. What you need is a high-temperature glue that bonds Aluminium and a silicone rubber. The benchmark temperature that the glue needs to withstand is about 100\xa0°C or approximately 200 °F.</p>\n<p><a href="https://www.mcmaster.com/glue/for-use-on%7Ealuminum/for-joining%7Erubber/" rel="nofollow noreferrer">McMaster-Carr</a> allowed me to search for glue-properties and suggests among others contact adhesives, which are cans or tubes with a very viscous glue. You let that pre-cure on the items and then push the two together, resulting in very strong bonds. One of the items they suggest is <a href="https://www.3m.com/3M/en_US/company-us/all-3m-products/%7E/3M-Plastic-Adhesive-2262/?N=5002385%203293193728&amp;rt=rud" rel="nofollow noreferrer">3M 2262</a> for which McMaster-Carr lists 230\xa0°F as the max temperature, so just in the <em>safe</em> range. However, a 32 oz. can for almost 100 $ is surely overkill, the <a href="https://multimedia.3m.com/mws/media/1015904O/3m-industrial-adhesives-and-tapes.pdf" rel="nofollow noreferrer">3M manufacturer catalog</a> lists only 1\xa0qt and 5\xa0gal as the available packaging sizes, so, unless you build printers for a living or know someone who uses this industrially, this is not an option.</p>\n<p>The same catalog also lists the <a href="https://www.3m.com/3M/en_US/company-us/all-3m-products/%7E/3M-Double-Coated-Tape-9496LE/?N=5002385%203293242019&amp;rt=rud" rel="nofollow noreferrer">&quot;3M™ 200MP&amp; 300LSE&quot;</a> series with temperatures of 148\xa0°C (300\xa0°F) to 204\xa0°C (400\xa0°F). That is enough to print anything on. And it\'s the same glue that\' used on my Build-Tak replacement surfaces to stick them to the Aluminium bed, so it could be suitable for gluing the heater to the bed on the other side too. However, I wish you good luck to find a reseller that sells you a fitting amount. Industrial packaging is available, but you\'ll need to find a reseller that offers a somewhat fitting size for you - I have seen Amazon listings for both types in sizes that have only small waste for most common heaters.</p>\n<p><a href="https://i.stack.imgur.com/t3S0H.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/t3S0H.png" alt="enter image description here" /></a></p>\n<hr />\n<p>I am not affiliated with 3M or McMaster-Carr, but I have very good experience with 300LSE.</p>\n'}, {'answer_id': 14957, 'author': 'FarO', 'author_id': 2338, 'author_profile': 'https://3dprinting.stackexchange.com/users/2338', 'pm_score': 1, 'selected': False, 'text': '<p>I suggest not gluing it. Starting from the top, make a sandwich this way:</p>\n<p>Aluminium with holes for bolts - Silicone heater - Thin cork (the one from IKEA, 2 mm thick for office desks is fine) - Thin plywood with holes for bolts (or other stiff material holding at least 60°C)</p>\n<p>This way you use the aluminium and the plywood to keep the silicone heater well in contact with the aluminium, and the cork insulates so that less heat is lost on the bottom side.</p>\n<p>Also, cork is fire-retardant.</p>\n<p>If the heater fails replacing it is simple.</p>\n<p>Also, you can and should cut away from the cork some space for a thermal non resettable fuse at 180°C to cut power if the heater overheats.</p>\n<p>In my case I should have used one more bolt, as you can see in the photo.</p>\n<p><a href="https://i.stack.imgur.com/0nwJN.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/0nwJN.jpg" alt="enter image description here" /></a></p>\n'}]
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