I have tried to J-HOP a few times now and haven't had any good results. I tried RTV sealent/permatex, but it was too soft. So far the best i've used seemed to be the silicone. It was 100% silicone calk. I would love to get a thread started here for people trying different materials for the J-hop. So far, the best material seems to be this, But this guy is using an entirely different method than the J-hop and actually casting his own buckings. I've been thinking about doing something similar but i just returned my lathe back to harbor freight a month ago. :doh:That J-jop looks very interesting. I've never heard of it before but it seems simple enough. It's based on the r-hop; you just use silicone caulk/sealant to fill the hopup window while you have a rod filling up the barrel to make sure the caulk takes the right shape. I'll have to try this at some point and see how it works. Silicone caulk rubber is certainly rubbery enough to grip the bb. I'll also have to see if different caulks wield different results.
About the T-hop: this is why I made that whole post on how to google things. I did a google search on the t-hop and came up with this.
I agree, the surface does need to be very smooth. I used tin tape wrapped around a nail to put into the barrel to seal up the window. The issue i ran into with the silicone was it was glued to the edges of the Hop window and tin tape. I tried coating everything with Petroleum jelly first to keep it from sticking, but that didn't work either. When i removed the nail, i think it tore up part of the bucking slightly. I couldn't get the R-hop off to sand the inside of it either. Even with the tear in it, it wasn't getting bad results, and I do think it would be possible to make this work, but it will take a lot of days and nights of testing and drying to make it work.I think you should use either packing tape or teflon tape as the outer layer of your shish kebab so you get the j-hop as smooth as possible. Depending on what duct tape you have it can be pretty smooth but because of the mesh that gives duct tape it's strength, it won't be as smooth as other tapes.
Ill look it up, By the way, the thread is active in the Rifles & Parts reviews section.You should check out the instructables page on the oogoo. The guy explains what the different cornstarch to caulk ratios do, the setting times, what it sticks to, etc. By the way, the oogoo was named after sugru because of their similar characteristics. Just an interesting fact.
can you send me a link of product :tup:?I find J-hop work best with Sika FC 11+ with a Shore A of 37 after 28 days.
usual silicon sealant has Shore A 25. used in 3 joule setup with 0.45g bb for more then 2000 shots
