Electronics > Beginners
OTC "Silasitc"?
stj:
they heat because the esr is not low enough to react in time to fast ripple.
these days we have low esr caps for that - back then you put several in parallel along with some ceramics.
jc101:
I use Dow Corning (now DOWSIL) 744, it was designed to be safe on electronics etc.
xavier60:
--- Quote from: xavier60 on February 16, 2019, 09:40:14 pm ---
--- Quote from: ender4171 on February 04, 2019, 05:26:49 pm ---Dave and others often talk about components being tied down with silastic. I have found the OG Dow/Corning 732 stuff, but it is pricey and not available in small quantities (way more than I would use in time without it going bad). Is there anything really special about it other than it is a neutral cure silicone? I was thinking of grabbing some GE Silicone II, which is also neutral cure and is available at any home store in small tubes. Does anyone have experience with that product, or have any recommendations for an alternative that is readily available?
--- End quote ---
I have been using ThreeBond(Japan) 1530C for years. It is moisture curing and non corrosive. Because it self levels, it gives a neat result.
The product isn't easily available in Australia. It is now available on ebay in retail blister pack. Be certain to read the review.
https://www.ebay.com/p/2-Pcs-Tube-Tb1530c-All-Purpose-Adhesive-Glue-Clear-Extra-Strong-Wood-Elasticity/18024574076?iid=173609103986
--- End quote ---
I have just received my first order for 2X 150g tubes from this Japanese online store.
https://global.rakuten.com/en/store/marunishi-online/item/3552896/
T3sl4co1l:
Hmm, shopping between Digikey and MG Chemicals, isn't easy, but this seems a likely candidate... if pricey.
https://www.digikey.com/product-detail/en/mg-chemicals/RTV162-300ML/473-1203-ND/1972157
The thermal conductivity is specified, though with some kind of bastard unit that can't be written correctly. If it's what I think they mean, it's close to 0.21 W/(m K) which isn't bad as adhesives go (comparable to say, FR-4).
Also RTV102 and 103 (black) I guess; cheaper.
This is cheaper, but poor thermal conductivity (average as sealants go),
https://www.digikey.com/product-detail/en/mg-chemicals/1035-85ML/473-1370-ND/1972170
probably comparable to the Dow 738 and similar, listed above.
https://www.digikey.com/product-detail/en/chip-quik-inc/NCS10W/NCS10W-ND/9836748 too,
Can't seem to find anything harder. These are pretty flexible (Shore A 20-30ish?). Saw one Shore D something. Would be nice to have options for more rigidity, like for glopping between electrolytic capacitors.
Probably the kind of thing you need to old fashioned read catalogs or phone up the manufacturer to select products.. ::)
Tim
xavier60:
It's difficult to find common products that are flowable, transparent and non-corrosive.
This product is easier to re-enter, https://www.permatex.com/products/adhesives-sealants/sealants/permatex-flowable-silicone-windshield-glass-sealer/
Like with most Permatex products, the tube cap is programmed to fall apart so that one is likely to find spoiled contents the next time it is needed.
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