--- product_id: 342109784 title: "Rosin Paste Flux Beige 2ounce" brand: "sra soldering products" price: "NZ$47" currency: NZD in_stock: true reviews_count: 5 category: "Sra Soldering Products" url: https://www.desertcart.nz/products/342109784-rosin-paste-flux-beige-2ounce store_origin: NZ region: New Zealand --- # Active temp 93–315°C 2oz precision paste No-clean corrosion protection Rosin Paste Flux Beige 2ounce **Brand:** sra soldering products **Price:** NZ$47 **Availability:** ✅ In Stock ## Summary > ⚡ Elevate your solder game with precision and protection! ## Quick Answers - **What is this?** Rosin Paste Flux Beige 2ounce by sra soldering products - **How much does it cost?** NZ$47 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/342109784-rosin-paste-flux-beige-2ounce) ## Best For - sra soldering products enthusiasts ## Why This Product - Trusted sra soldering products brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **No Cleanup Needed:** Save time with a flux that doesn’t require post-soldering residue removal. - • **Fast Heat Activation:** Works efficiently between 93°C and 315°C for quicker, stronger bonds. - • **Corrosion-Resistant Finish:** Rosin-based formula leaves a protective layer that guards your joints long-term. - • **Trusted by Pros & Hobbyists:** Top-rated with 4.7 stars and thousands of users who swear by its reliability. - • **Precision-Controlled Soldering:** Apply flux exactly where you want solder to flow—no mess, no guesswork. ## Overview SRA #135 Rosin Paste Flux is a 2-ounce, petrolatum-based soldering flux designed for electrical and PCB repairs. It activates between 93°C and 315°C, contains no corrosive zinc or ammonium chlorides, and leaves a protective, no-clean coating that prevents corrosion. Ideal for professionals and enthusiasts seeking precise, mess-free soldering with long-lasting results. ## Description From the manufacturer About Appearance of the Flux SRA #135 flux is an amber colored paste. The consistency of the flux should not be gooey or hard to puncture. In other words it should be solid but also easy to dip wires and applicators into. If you see crystallization (rosin hardening) at the surface of the flux this is absolutely normal and NOT an indication of expired or tampered with flux. SKU: FLS135 SRA #135 is a petrolatum-based soldering flux, containing Rosin and organic acid activator. Unlike many paste fluxes, it contains NO Zinc Chloride or Ammonium Chloride, making it ideal for electrical and electronic repairs. The Rosin also leaves a protective coating over the soldered area that can prevent corrosion. Ideal for electrical and PCB repairs Does not need to be cleaned Contains 2 ounces (56.6 grams) in a jar Type RA (Rosin-Activated) Flux Active Temperature Range: 93 – 315°C / 200 – 600° Dimensions: 2.5″ Dia x 1″ H (64 x 25.5 mm) Weight: 2.5 Oz (70.8g) Made in USA Why Use Flux? Flux Comparison Soldering without flux is like trying to put a new registration label onto your license plate without first wiping off the layer of dirt and grime that has accrued on your license plate since last year. The surface needs to be clean so the adhesives on the label can do their job. because solder cannot bond without it! In order for solder to do its job, the layer of oxides on the metal surfaces you're soldering must be removed. A good flux, like #135, removes the oxides and sets the stage for soldering. The solder follows the flux, as if the flux were clearing a path for the solder and telling it where it to go. For many soldering applications, using only flux-core solder wire is sufficient. However, there are benefits of adding an externally applied flux such SRA #135, these benefits include More control over where the solder will travel – Wherever you apply the flux, the solder will flow to. Expedites the soldering process – It takes less heat and time to get the solder to flow where you need it. Results in a stronger connection – The flux allows the solder to bond properly throughout the target area. Protects the solder joint – This rosin paste not have to be cleaned off after soldering and the residue actually provides a protective coating from corrosion. How it Works Prep Surfaces Prep the surfaces by removing any dirt, rust, grease, paint, and other contaminants with sandpaper, wire brush, steel wool, etc. For many applications, the residues can be removed with just a rag and some isopropyl alcohol. These impurities may prevent solder flow so it is important not to proceed until clean metal is visible. Choose an Applicator Various tools can be used as an applicator for the flux including toothpicks, acid brushes and spatulas. Wires and components can simply be dipped as well. One of the benefits of paste flux opposed to liquid is that it will stay put wherever you apply it. Apply the Flux Paste Using your applicator of choice, apply the flux to the target areas you are about to solder. The exact amount applied will depend on the job but in general use just enough to cover the area to be soldered in an even coating. Remember that the solder will flow to where the flux is so make sure to apply only where it is needed to prevent solder bridges and mess. Apply Heat and Solder Apply heat using a soldering iron or hot air gun to bring to melting temperature and solder. Remove heat and allow to cool. Remove residue with rag if wanted. Frequently Asked Questions (FAQs) Is it effective when working to simply dip the solder wire into the flux and solder or is it significantly better to apply to the joint and why? You want to apply the right amount of flux. Too little and you won’t get good soldering results. Too much and you run the risk of the solder flowing where you don’t want it to, since solder follows flux. You want to apply the flux in the manner that will best ensure you lay down the right amount. Usually this means using a tool to apply the flux to the area being soldered and not dipping the part into the #135. SRA #135 is not runny, and if you dip the part into the flux, you might not get enough flux on it. That being said, I am sure there are people who do dip their part into the #135 flux and get good results. Is it advisable to heat up the flux with a heat gun if it is too hard/solid? You would want to do this very carefully since you don’t want the ingredients in the flux to separate. Quick, intense heat could cause the flux to separate into disparate ingredients. While this is not too likely, it can happen. If the rosin flux becomes dry is there anything you can do to return it to more of a paste? You would want to gently heat it until it softens up, but you need to be careful not to heat it up too quickly or at too high of a temperature. Does dipping your soldering iron directly into the flux help keep the tip clean, are there any benefits? Not a great idea. It wouldn’t be good for the solder iron because if you get too much rosin on a solder iron, it can be hard to clean off. Also, it can cause the flux to separate. Better to put the flux on the part that you are soldering, and to then apply the solder wire and solder iron to the area where the flux is. Of course, the solder iron will usually contact the flux, but you don’t want to 'bathe' the soldering iron inside the flux by sticking it in the flux jar. Review: منتج اصلي ونوعية ممتازة - نوعية اصلية وممتاز Review: Accurate great quantity helps create stronger bonds! - The quantity of this product is amazing for the price. You only need a very small amount to get most jobs done, so this will last me quite a while. This is so easy to use and works fast. It’s not too thick and not too thin rather just right. I used this product to help me clean the ends of a tape measure I sanded for my ham radio tape measure antenna. This enabled me to solder the cable wires to the tape measure with ease. The joint bonded much stronger with the use of this flux. I highly recommend this for both those new to soldering and seasoned soldering experts. ## Features - manufacturer: SRA Soldering Products - Item Trademark: SRA SOLDERING PRODUCTS - Item Weight: ounces, pounds, 0.1250, 2. - Item Category: Tools ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B008ZIV85A | | ASIN | B008ZIV85A | | Batteries Included? | No | | Batteries Required? | No | | Best Sellers Rank | #27,199 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #78 in Solder, Solder Fluxes & Pastes | | Color | Rosin Paste | | Customer Reviews | 4.7 4.7 out of 5 stars (17,059) | | Customer reviews | 4.7 4.7 out of 5 stars (17,059) | | Date First Available | 12 September 2015 | | Date First Available | 12 September 2015 | | Is Discontinued By Manufacturer | No | | Item Package Quantity | 1 | | Item Weight | 56.6 g | | Item model number | FLS135 | | Item model number | FLS135 | | Manufacturer | SRA Soldering Products | | Manufacturer | SRA Soldering Products | | Part number | 135 | | Product Dimensions | 7.62 x 2.54 x 7.62 cm; 56.7 g | | Product Dimensions | 7.62 x 2.54 x 7.62 cm; 56.7 g | ## Images ![Rosin Paste Flux Beige 2ounce - Image 1](https://m.media-amazon.com/images/I/51yf-bKX00L.jpg) ## Questions & Answers **Q: Will this work for soldering copper speaker wire together** A: Yes, apply the flux sparingly to the wires. Heat the assembled wiring wIth your soldering iron while touching the wiring with your solder just until the solder melts and flows into the joint. Don't linger with the iron because you can oxidize the solder and the copper wire with excessive overheating. Insulate the joint with heat shrink tape or electrical tape where necessary. **Q: Is this specific Rosin Paste Flux #135 non-conductive ?** A: In case you meant to ask "non-corrosive" the answer is, this should not be corrosive. I haven't seen acid core solder or acid flux in years but it likely still exists. The acid flux is mostly used in plumbing applications, if memory serves me correctly. As someone else mentioned it is still a good idea to clean off the residue of any flux. Neatness counts! **Q: What is this. What does it do** A: One states that it makes soldering easier and another states that it facilitates heat transfer. Both are right. But let ne try to further explain. Solder when heated will sometimes "ball up" when instead you want it to "flow" onto the contact pad on a printed circuit board or "soak" into the wire. It does this properly when there is the right amount of heat between the iron and intended surface. This is where the flux comes in play as it increases soldering productivity by making the desired soldering reactions take place more quickly. This also protects your insulation and other board components by effectively removing heat from surrounding areas more quickly. Hope this helps. **Q: Is the flux supposed to be pretty hard? The instructions say to brush it on but it's to hard for a brush to pick anything up.** A: If you just get a small/medium container/bottle(that seals so it wont dry out/evaporate) you can scoop some of this paste into a small amount of Isopropyl Alcohol(91% and up, 99% is best less water) let it sit for a day to dissolve, You can also use heat to make the mixing processes faster but better to let it sit and dissolve on its own and let it do its thing and boom liquid flux. You can use with a brush or some kind of squirt bottle to dispense It, I use old vape juice bottles. hope that this helps. It works really well for me! Good Luck! ## Customer Reviews ### ⭐⭐⭐⭐⭐ منتج اصلي ونوعية ممتازة *by M***8 on 23 October 2025* نوعية اصلية وممتاز ### ⭐⭐⭐⭐⭐ Accurate great quantity helps create stronger bonds! *by K***N on 30 January 2026* The quantity of this product is amazing for the price. You only need a very small amount to get most jobs done, so this will last me quite a while. This is so easy to use and works fast. It’s not too thick and not too thin rather just right. I used this product to help me clean the ends of a tape measure I sanded for my ham radio tape measure antenna. This enabled me to solder the cable wires to the tape measure with ease. The joint bonded much stronger with the use of this flux. I highly recommend this for both those new to soldering and seasoned soldering experts. ### ⭐⭐⭐⭐⭐ Superb quality but best used with a syringe *by D***Y on 21 March 2021* I used one of those cheap fluxes and boy oh boy what a difference! However it's best to use it by putting it first into a syrnge equipped with a hollow needle of about 0.7 - 1 mm inner hole diameter. That will help immensely with the application ## Frequently Bought Together - SRA Solder 135 Rosin Paste Soldering Flux For Electronics, No Clean Flux Made for Lead and Lead-Free Solder Circuit Boards and Copper Electrical Wire - Safe Clean Residues with No Goopy Mess (2oz Jar) - MAIYUM 63-37 Tin Lead Rosin Core Solder Wire for Electrical Soldering (0.8mm 50g) - Lesnow solder wick braid 10ft Length Desoldering Wick Braid Remover Tool Solder Sucker 1 piece No-Clean soldering Wick Wire Roll and Disassemble Electrical Components --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.nz/products/342109784-rosin-paste-flux-beige-2ounce](https://www.desertcart.nz/products/342109784-rosin-paste-flux-beige-2ounce) --- *Product available on Desertcart New Zealand* *Store origin: NZ* *Last updated: 2026-06-24*