View Full Version : Rocksett for supressed and non-suppressed muzzle device installation
BufordTJustice
01-17-18, 15:01
Being a huge fan of Rocksett by Flexbar for attaching muzzle devices, I found this on eBay:
4oz for ~$20 shipped
https://www.ebay.com/itm/High-Temperature-Rocksett-Adhesive-Ceramic-Cement-4-oz-15015/252183105263?epid=1217710681&hash=item3ab748ceef:g:maAAAOSwofxUmEn2
2oz for ~$15 shipped
https://www.ebay.com/itm/High-Temperature-Rocksett-Adhesive-Ceramic-Cement-2-oz-15014/252614266635?hash=item3ad0fbcf0b:g:LZwAAOSwiCRUmEcA
Cheapest source on the web that I can currently find.
Both being more than one could need aside from a gunshop (a little goes a fantastically long way). But Rocksett does get gelatinous (and, therefore, useless) with if exposed to air, so keep the bottle vertical and the cap on. Still, no more small bottles from various big box online retailers with $15 shipping.
My 2oz container arrived yesterday and the invoice indicated it is indeed direct from Flexbar, the actual company. Very nice. Already installed my AR10 ASR trifecta flash hider with it. As always, fully degrease and clean with rubbing alcohol prior to install for all surfaces. Let set for at least 12 hours (I prefer 24) and you're off to the races.
Also, note that when anaerobic threadlockers are used on precision threads (with very little play and, thus, air), they begin to fixture QUICKLY. I learned this last night while installing my Mega/ZEV wedgelock AR10 keymod rail.
More on that build in the appropriate section, at a later date.
EDIT: Also found here, thanks to Kwelz
https://www.amazon.com/Flexbar-15015-High-Temperature-Rocksett/dp/B001C19278/ref=sr_1_2?ie=UTF8&qid=1517436138&sr=8-2&keywords=rockset
https://www.amazon.com/Flexbar-15014-High-Temperature-Rocksett/dp/B001C1D800/ref=sr_1_1?ie=UTF8&qid=1517436138&sr=8-1&keywords=rockset
Pappabear bought us a few monster bottles of Rockset. No sure the brand. But yeah... the blister packs suck. They're no good when you go to use them after a few months.
Thanks for posting. I have a couple that need doing.
BufordTJustice
01-17-18, 17:20
Pappabear bought us a few monster bottles of Rockset. No sure the brand. But yeah... the blister packs suck. They're no good when you go to use them after a few months.
I just experienced not one, not two, but THREE blister packs which had turned to jelly. They weren't even that old, either. Flexbar owns the rights to the name, so if it says Rocksett, they made it.
Thanks for posting. I have a couple that need doing.
Np. It's half the price of anywhere else I can find on the internet. Glad to share.
I've got a big bottle for about a year and a half and it is holding up fine. I will probably never use it all.
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Would it help to keep this product in the freezer like I keep Krazy Glue? Just wondering, thanks.
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BufordTJustice
01-18-18, 08:49
Would it help to keep this product in the freezer like I keep Krazy Glue? Just wondering, thanks.
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I honestly don't know either way. I would lean toward "no freezer" due to the very high relative humidity inside, but I would defer to Flexbar's opinion. You'd have to call or email them.
Would it help to keep this product in the freezer like I keep Krazy Glue? Just wondering, thanks.
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No, would not be advisable. Excerpt below is from the MSDS
Storage:
Store above 32oF and below 122oF, and ensure that the product can only be withdrawn for use by persons possessing a copy of this Materials Safety Sheet. Below 32oF the product will freeze, and if stored above 122oF for any length of time it may dry out. Both situations will impair the product's performance.
http://www.flexbar.com/PDF/MSDS%20ROCKSETT.pdf
No, would not be advisable. Excerpt below is from the MSDS
Storage:
Store above 32oF and below 122oF, and ensure that the product can only be withdrawn for use by persons possessing a copy of this Materials Safety Sheet. Below 32oF the product will freeze, and if stored above 122oF for any length of time it may dry out. Both situations will impair the product's performance.
http://www.flexbar.com/PDF/MSDS%20ROCKSETT.pdfThanks for that information!
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556BlackRifle
01-20-18, 20:38
Thanks BTJ! That's one hell of a deal at a great price. Just ordered and should have it by the 29th.
BufordTJustice
01-20-18, 21:43
Thanks BTJ! That's one hell of a deal at a great price. Just ordered and should have it by the 29th.
Yeah brother. Happy to help the community.
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In addition having spoken directly to the people at Flexbar after we had an issue, you can see degradation in as few as 6 months as I recall.
Combat_Diver
01-21-18, 01:50
80% of the time the small tube of Rocksett in the SF4P package is no good. Storing in an ISU90 outside doesn't help. Do have a large bottle inside the shop that still good after several years.
CD
nightchief
01-21-18, 15:13
Thank you BTJ for the link. I do a lot of projects using CA (krazy glue) types of adhesives. I keep them in ziplock bag with some desectant. I have some CA that has stayed useable for several years. This is how I’m storing the Rocksett too. Haven't had the Rocksett long enough to see if it will last as long, but it seems the Rocksett suffers from the same issue, a change in chemistry account temperature and moisture.
Keep in mind, nearly every chemical has an MSDS sheet. Almost all are available with a search on the net.
What are you guys finding as an advantage of using Rocksett on muzzle devices over the various types of Loctite?
gunnerblue
01-26-18, 14:33
It is very heat resistant (important especially when using a suppressor) but is not much stronger than Loctite 242 making it easy to remove by hand.
Thank you! Just ordered a bottle. I've been looking everywhere and nobody carries it locally.
It is very heat resistant (important especially when using a suppressor) but is not much stronger than Loctite 242 making it easy to remove by hand.
That sounds like the best of both worlds. Are you guys using it on any other assemblies such as gas blocks (high heat) or receiver extensions (no heat)? Even for assemblies that don't see heat it sounds like its resistance to chemicals, oils, solvents would make it a good for such assemblies.
I only use it on muzzle devices and gas blocks, if they have set screws
gunnerblue
01-26-18, 17:32
I also use it on gas blocks if they have set screws. A lot of manufacturers seem to use red Loctite, which while requiring heat to loosen, must work well enough I suppose.
BufordTJustice
01-27-18, 18:09
That sounds like the best of both worlds. Are you guys using it on any other assemblies such as gas blocks (high heat) or receiver extensions (no heat)? Even for assemblies that don't see heat it sounds like its resistance to chemicals, oils, solvents would make it a good for such assemblies.
Gas blocks? Yes.
REs? No.
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BufordTJustice
01-27-18, 18:17
What are you guys finding as an advantage of using Rocksett on muzzle devices over the various types of Loctite?
Shooting with a can adds roughly 15 degrees F, PER SHOT.
In 30 rounds, accounting for an ambient temperature of 80 F, one gets perilously close to the 450 F heat rating of red 272 in one single magazine, as far as the heat put into the can and the muzzle device.
Rocksett being flat rated to about 2100 F is a huge improvement in temp rating.
So, for a precision rig, there may not be a difference. But for a defensive or comp rig, there certainly is.
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Heres my take on Rocksett and its storage.
A couple years back I Installed 2 diff muzzle devices using 2 diff brand new tubes of rocksett I had on the bench from SF muzzle devices.
A week after I shipped a customer upper out with a BC 51T mount, I got a call saying his BC had started coming loose... I said hmm wtf... We got him taken care of.
About a month later, I got a call from an LE guy who had a silencerco brake I installed, he said it had broken loose too.
After seeing the BC 51T upper in house after the case, I noticed the residue on the threads was not the usual white, but dark grey. Thats not the norm for rocksett as most of us have seen.
When I talked to the LE guy, he said his residue was also dark grey.
After some talks with Flexbar, they said that they dont sell rocksett less than a 55gal drum. The Rocksett is packaged by their customers and then sold. We all know that rocksett breaks down due to oxygen exposure and flexbar indicated to a roughly 1 year shelf life after its first exposure to oxygen.
Knowing that, I would not keep rocksett of any packaging over 6 mon as the first exposure to oxygen is unknown.
BufordTJustice
01-27-18, 21:45
Heres my take on Rocksett and its storage.
A couple years back I Installed 2 diff muzzle devices using 2 diff brand new tubes of rocksett I had on the bench from SF muzzle devices.
A week after I shipped a customer upper out with a BC 51T mount, I got a call saying his BC had started coming loose... I said hmm wtf... We got him taken care of.
About a month later, I got a call from an LE guy who had a silencerco brake I installed, he said it had broken loose too.
After seeing the BC 51T upper in house after the case, I noticed the residue on the threads was not the usual white, but dark grey. Thats not the norm for rocksett as most of us have seen.
When I talked to the LE guy, he said his residue was also dark grey.
After some talks with Flexbar, they said that they dont sell rocksett less than a 55gal drum. The Rocksett is packaged by their customers and then sold. We all know that rocksett breaks down due to oxygen exposure and flexbar indicated to a roughly 1 year shelf life after its first exposure to oxygen.
Knowing that, I would not keep rocksett of any packaging over 6 mon as the first exposure to oxygen is unknown.
Excellent info, Steve.
However, my bottle came directly from Flexbar, both on the shipping label and invoice inside the box.
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Thats good and like i said, this was from a couple years back. I suppose things have changed since then.
BufordTJustice
01-28-18, 16:46
Thats good and like i said, this was from a couple years back. I suppose things have changed since then.
At least these two listings on eBay are. I'm sure that there are many other bottles of Rocksett that are individually packaged by a third party.
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Being a huge fan of Rocksett by Flexbar for attaching muzzle devices, I found this on eBay:
4oz for ~$20 shipped
https://www.ebay.com/itm/High-Temperature-Rocksett-Adhesive-Ceramic-Cement-4-oz-15015/252183105263?epid=1217710681&hash=item3ab748ceef:g:maAAAOSwofxUmEn2
2oz for ~$15 shipped
https://www.ebay.com/itm/High-Temperature-Rocksett-Adhesive-Ceramic-Cement-2-oz-15014/252614266635?hash=item3ad0fbcf0b:g:LZwAAOSwiCRUmEcA
Cheapest source on the web that I can currently find.
Both being more than one could need aside from a gunshop (a little goes a fantastically long way). But Rocksett does get gelatinous (and, therefore, useless) with if exposed to air, so keep the bottle vertical and the cap on. Still, no more small bottles from various big box online retailers with $15 shipping.
My 2oz container arrived yesterday and the invoice indicated it is indeed direct from Flexbar, the actual company. Very nice. Already installed my AR10 ASR trifecta flash hider with it. As always, fully degrease and clean with rubbing alcohol prior to install for all surfaces. Let set for at least 12 hours (I prefer 24) and you're off to the races.
Also, note that when anaerobic threadlockers are used on precision threads (with very little play and, thus, air), they begin to fixture QUICKLY. I learned this last night while installing my Mega/ZEV wedgelock AR10 keymod rail.
More on that build in the appropriate section, at a later date.
Yep thats what I bought, two bottles. I didn't really think the bottles would be 1/4 that size. But liked getting them. good stuff.
PB
Shooting with a can adds roughly 15 degrees F, PER SHOT.
In 30 rounds, accounting for an ambient temperature of 80 F, one gets perilously close to the 450 F heat rating of red 272 in one single magazine, as far as the heat put into the can and the muzzle device.
Rocksett being flat rated to about 2100 F is a huge improvement in temp rating.
So, for a precision rig, there may not be a difference. But for a defensive or comp rig, there certainly is.
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No doubt.
Was workiing on an upper today where red Loctite was used to secure the silencerco ASR suppressor mount brake to the barrel.
It was on there really good cold, but 10 seconds with the MAPP gas torch softened it right up and it came of with minimal torque after that.
That wouldn't have held up very well for heavy use.
BufordTJustice
01-30-18, 09:52
No doubt.
Was workiing on an upper today where red Loctite was used to secure the silencerco ASR suppressor mount brake to the barrel.
It was on there really good cold, but 10 seconds with the MAPP gas torch softened it right up and it came of with minimal torque after that.
That wouldn't have held up very well for heavy use.
Exactly. For a precision bolt gun it should be fine. But the first thing most folks wanna do once they get their can, in my experience, is sling a little bit of lead. Having literally 30 rounds soften the loctite to the point of unthreading and a baffle strike is just not worth it for me. Especially with this price on Rocksett. I paid more than $15 shipped for two little single-use packages of rocksett from AAC.
BufordTJustice
01-31-18, 08:02
No doubt.
Was workiing on an upper today where red Loctite was used to secure the silencerco ASR suppressor mount brake to the barrel.
It was on there really good cold, but 10 seconds with the MAPP gas torch softened it right up and it came of with minimal torque after that.
That wouldn't have held up very well for heavy use.
Exactly. You move past the break torque pretty quick....and the prevail torque temp is not much past that.
Red Loctite is a great way to shoot your can off your gun or get a baffle strike. Only reason I would consider it would be on a direct-thread can that has ALSO been torqued properly.
10 seconds with the MAPP torch and off she comes when needed. I could see that being an option. But essentially only that scenario, within the context of centerfire rifle cans.
For those that don't like ebay.
https://www.amazon.com/Flexbar-15015-High-Temperature-Rocksett/dp/B001C19278/ref=sr_1_2?ie=UTF8&qid=1517436138&sr=8-2&keywords=rockset
https://www.amazon.com/Flexbar-15014-High-Temperature-Rocksett/dp/B001C1D800/ref=sr_1_1?ie=UTF8&qid=1517436138&sr=8-1&keywords=rockset
BufordTJustice
01-31-18, 16:10
For those that don't like ebay.
https://www.amazon.com/Flexbar-15015-High-Temperature-Rocksett/dp/B001C19278/ref=sr_1_2?ie=UTF8&qid=1517436138&sr=8-2&keywords=rockset
https://www.amazon.com/Flexbar-15014-High-Temperature-Rocksett/dp/B001C1D800/ref=sr_1_1?ie=UTF8&qid=1517436138&sr=8-1&keywords=rockset
Outstanding find! Thanks, brother.
Lostinthewoods
03-09-18, 15:34
Brownells has it, too, about $15, if I remember right.
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