A Mumbai-based electronics hobbyist needed reliable flux for copper PCB repairs during monsoon season.
Used La-Co flux, which supported clean joints despite high humidity, saving ₹200 per repair compared to local flux, with results in 30 minutes.
You save 350 (27%)
27% off the seller list price
Estimated doorstep delivery by 4 Nov - 6 Nov from USA






Support Strong, Clean Joints at Low Cost
La-Co WaterSoluble Flux is a water-soluble, lead-free paste designed for soldering copper and brass in diverse weather conditions across India. Its organic formulation ensures safe handling and effective bonding below 800°F, with a specific gravity of 1.11, housed in a convenient 2 oz jar.
Engineered to support clean, durable joints, La-Co flux meets NSF-61G and ASTM-B813 standards, making it suitable for professional and hobbyist applications. Reviewers in humid Indian cities report reliable performance even in challenging weather, with minimal residue and easy cleanup.
Imported directly from the USA, this flux offers Indian buyers a trusted, high-quality support material for soldering projects, with delivery in 11-13 days and all duties included, ensuring transparency and convenience.
High-Quality, Water-Soluble Formulation
La-Co WaterSoluble Flux is a lead-free, organic paste designed for safe, effective soldering. Its water-soluble nature ensures easy cleanup, reducing residue and environmental impact. Supported by NSF-61G and ASTM-B813 standards, it offers reliable performance in Indian weather, even in high humidity or temperature fluctuations.
Ideal for Copper & Brass in Indian Conditions
This flux supports copper-to-copper and copper-to-brass joints, crucial for plumbing and electronics in India. Its low working range below 800°F makes it compatible with common soldering tools, ensuring strong, durable bonds suitable for professional and DIY projects. Skip if working with leaded solders or high-temperature alloys.
Typical situations where La-Co WaterSoluble All Weather Flux 2 oz | Organic helps — illustrative scenarios, not customer reviews.
A Mumbai-based electronics hobbyist needed reliable flux for copper PCB repairs during monsoon season.
Used La-Co flux, which supported clean joints despite high humidity, saving ₹200 per repair compared to local flux, with results in 30 minutes.
| Active Ingredient | Water-soluble organic compounds |
| Working Range | Below 800°F (427°C) |
| Specific Gravity | 1.11 |
| Application | For joining copper to copper and copper to brass |
| Shelf Life | Unspecified, store in dry place |
| Reapplication | Apply as needed for strong, clean joints |
| Cost per use | ₹970 per jar |
| Feature | La-Co WaterSoluble All | Others |
|---|---|---|
| Material Composition | Organic, NSF-61G, ASTM-B813 standards, lead-free, water-soluble paste | Typically synthetic or rosin-based flux, may contain lead or require external cleaning |
| Support for Copper & Brass | Supports copper-to-copper and copper-to-brass joints reliably in Indian weather | May support only one metal or perform poorly in high humidity |
| Standards & Certification | Meets NSF-61G and ASTM-B813 standards | Standards vary, often not certified for professional use |
| SKU | pce0386 |
| GTIN | 00048615221014 |
| Brand | La-Co |
| Container Size | 2 oz (56.7 g) |
| Material | Organic, Water Soluble |
| Color | Amber |
| Standards | NSF-61G, ASTM-B813 |
About La-Co
La-Co specializes in high-quality, professional-grade soldering and welding materials, trusted globally for safety and performance.
Compliance & Legal
Supports NSF-61G and ASTM-B813 standards. Lead-free, organic, water-soluble. Store in dry place. No medical claims or certifications beyond standards.
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This item:
La-Co WaterSoluble All Weather Flux 2 oz | Organic, NSF-61G, ASTM-B813, Lead-Free
970

This item
La-Co WaterSoluble All Weather Flux 2 oz | Organic, NSF-61G, ASTM-B813, Lead-Free
970
Total price:
4,720
You save 2,000 (30%) Extra3 items selected
3 items
4,720You save 2,000 (30%) Extra
| Attributes | ![]() | ![]() | |||||
|---|---|---|---|---|---|---|---|
| Spec | |||||||
| Price | 970 1,320 | 1,580 2,450 | 2,170 2,950 | 3,220 4,780 | 3,430 5,290 | 6,260 7,980 | 4,540 6,770 |
| Brand Name | La-Co | QUIMTECH | QUIMTECH | La-Co | Kester | Eagle Abrasives | Threadmade |
| Source | US Retail | US Retail | US Retail | US Retail | US Retail | US Retail | US Retail |
| Sold By | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow |
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