Liquid rosin flux and applicator size

[subman]

Could someone tell me where I can buy a 4oz. bottle of good liquid rosin flux and what size inner diameter needle do I need to apply the flux?

                                                     Thanks

                                                 Bob D

                                           

[locoworks]

not sure where in the US you'd buy it, but a cocktail stick or even a pin/needle dipped into the flux will do for applying it to wherever you want. 

[JSperan]

 Micro-Mark is one place you can get it.  It will also be available from many electronic suppliers.  Applying the flux can be accomplished with any number of things.  Micro-Mark also sells disposable mini brushes that work well for this.  A toothpick, while not as handy will work.  If you need to use a needle I think it would flow through even the smallest sized applicator.

Don't leave the cap off or it will evaporate on you. :o)

[jeffrey-wimberly]

 I used a small paint brush with a very thin tip before I switched to paste flux. Be sure to avoid acid base flux.

[betamax]

Any decent electronics store will have a selection of soldering tools and accessories. They will have Rosin Flux. Just buy a small bottle, as a large quantity may dry out before you use it.

You can buy dispenser bottles from Weller made just for that purpose. You just fill the bottle with some flux, and then squeeze it to force a little down the needle onto the work. Very easy method of dispensing flux.

[rrinker]

 I ordered some Supersafe #30 from H&N Electronics, I've used it both for track soldering (Fast Tracks turnouts) and electrical wiring, and it works great. I use the yellow microbrushes as applicators, perfect size for HO track. I have both the liquid and paste, and probably could have done without ordering the apste - it's really the same stuff just thicker, and th eliquid is already thick enough that it doesn't flow all over the place - it's not like dabbing water on, you put a dab of the liquid flux on the rail to tie joint and it stays there.

 Excellent service, the H&N site talks a lot about modeling, and since this stuff is really that safe it has no special shippign requirements - for just 1 bottle, standard USPS mail works. Usual disclaimers - I have no connection to this company, just a satisfied customer.

Edit: found his pictures section, the owner has a 1930's-1950's PRR HO layout. Pretty nice

                                     --Randy