Best RTV

drew2009, Nov 22, 1:01pm
Looking for some opinions on what is the best RTV silicone gasket goo, for sealing up a sump pan and other mechanical applications.
I have always used ultra copper as i know its the best but looking for some opinions on cheaper stuff.
phillip.weston, Nov 22, 2:09pm
ThreeBond!
drew2009, Nov 22, 11:28pm
Where do you get threebond!
hurricaneken, Nov 23, 9:59am
threebond you can get at BNT and alot of motorcycle shops sell it
jummybuffett, Nov 23, 10:16am
permatexmakes a product called mega grey, its just as good as threebond if used correctly and half the price
mrcat1, Nov 23, 7:36pm
Ados contact adhesive for a sump, i also use blue hylema, not sure on spelling but works very well, doesn't go hard like silicon, i believe same stuff rolls use on their engines.
stevo2, Nov 24, 3:59am
I also use blue Hylomar. Never had an issue but it aint cheap.
Stevo
skin1235, Nov 24, 4:22am
"gasket goo' for surfaces that may need to be opened again( quad and bike side covers, tappet covers etc), hylomar for seals and flat faces ( absolutely magic stuff for internal oil pump - faces , mounts etc)

beware using contact adhesive on pans and sump faces, only apply to one side or the next time you have to open it you'll be there a while, and spend a lot of time and effort just to get a workable surface for refit, I'd use hylomar or a bead type to hold a gasket in place while fitting before contact

Stag was the sealer of choice for RR for many years, red compound in a tin, great 'take up' ( would give a good seal with up to 10 thou of warp) and easy 'release'
drew2009, Nov 24, 9:13am
Thanks guys i had never heard of using contact adhesive on a sump.
Getting sick of oil dripping all over the drive from the sump pan so i'm going to get it sealed up this weekend.
xs1100, Nov 24, 7:50pm
wurth do a motorplas same stuff as stag never goes off great stuff
unbeatabull, Nov 24, 8:11pm
I tend to use Loctite Greymaxx for things you don't want to leak/worry about again (sump pans etc), or Clear Silicone RTV or I forget the name but its Loctite branded and is black silicone RTV. Depending on what you're sealing as to what you use really
drew2009, Nov 25, 12:26pm
thanks guys all good stuff
drew2009, Nov 25, 9:56pm
Just read some technical data on that blue hylomar. Sounds like great stuff might have to give it a try.
shane038, Nov 25, 9:57pm
I use 3 bond grey on all gearboxes I do works awesome!
mrcat1, Nov 26, 2:37pm
We always do both surfaces on a sump, mostly on heavy truck sumps.
phillip.weston, Nov 22, 2:09pm
I should add that it's not cheap - but it does the job perfectly every single time. You may save $20 on a cheaper equivalent but end up having to do the job twice then the cheap stuff leaks.