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Choose your system · 26 products · five categories
Tap a card for what it is, what it does, form, packing and dosing — then enquire or request the datasheet in one tap. Every product is quoted on enquiry — no prices or payment online; we reply within one working day.
Showing 26 of 26 products
A high-performance corrosion and scale inhibitor for open recirculating cooling systems that contain multiple metal types. It combines molybdate, polyphosphates, phosphonates, an azole yellow-metal inhibitor and polymeric dispersants to keep systems clean and protected.
| Form | Pale golden liquid |
| Packing | Non-returnable 20 kg drums |
| Dosing | Fed continuously (shot feeding possible); controlled by molybdate test with the range set by your technical representative. |
A non-volatile, liquid phosphate-based corrosion and deposit inhibitor for open recirculating cooling water systems. It pairs anodic and cathodic inhibitors for optimum corrosion control in water with moderate hardness and alkalinity.
| Form | Pale bronze liquid |
| Packing | Non-returnable 20 kg drums |
| Dosing | Fed continuously (shot feeding possible); controlled by phosphate test with ranges set by the technical advisor. |
A multifunctional biodispersant that breaks up slime from bacterial biofilms in cooling water systems, with added corrosion-inhibiting properties that help keep surfaces clean. It can be applied together with chlorine-based biocides for even more effective control of microbiological fouling.
| Form | Clear golden liquid |
| Packing | Non-returnable 20 kg drums |
| Dosing | 10-30 ppm 1-3 times per week for minimum fouling; 30-50 ppm 2-3 times per week for moderate fouling. |
A bromine-based disinfectant and biocide that is highly effective against bacteria, algae and fungi in cooling water, and especially effective at controlling Legionella. Designed for once-through cooling systems, open recirculating cooling towers, evaporative condensers, air scrubbers and wastewater systems.
| Form | Clear yellow to clear orange liquid |
| Packing | Non-returnable 20 kg drums |
| Dosing | Continuous feed 4.5-9.1 oz per 1000 gallons (target 2 ppm Br); intermittent slug feed 2.8-5.8 oz per 1000 gallons (target 4-6 ppm Br). |
A bromine-based disinfectant and biocide that is activated by mixing with chlorine just before application, instantly forming hypobromous acid. The activated product delivers rapid, broad-spectrum oxidizing power at low dosage relative to chlorine and is especially effective against Legionella.
| Form | Clear colourless liquid |
| Packing | Non-returnable 20 kg drums |
| Dosing | Continuous or intermittent feed after activation with a concentrated chlorine solution; treatment ranges set by the technical representative. |
A blend of bromine and chlorine in an easy-to-use solid tablet, highly effective against bacteria, algae and fungi in cooling water systems. Thanks to its bromine component it performs in both acid and alkaline water and outperforms conventional oxidizing biocides at high pH.
| Form | Solid white tablet |
| Packing | Non-returnable 5 kg cans |
| Dosing | 0.1-0.3 lbs per 1000 gallons of system water, fed continuously via a solid feed system (or a porous mesh bag). |
A chlorine neutralizer for cooling water systems, used after chemical disinfection of cooling towers. It can also be used in swimming pools and fountains to neutralize or adjust chlorine levels.
| Form | Clear colourless liquid |
| Packing | Non-returnable 4 kg drums |
| Dosing | Applied as supplied; approximately 300 mL neutralizes 10 ppm of chlorine in a 1 m³ system. |
A sodium hypochlorite-based disinfectant and biocide (10% active chlorine), highly effective against bacteria, algae and fungi and especially effective at controlling Legionella. Designed for cooling water systems, open recirculating cooling towers, evaporative condensers, water scrubbers, wastewater systems and swimming pools.
| Form | Pale yellow liquid |
| Packing | Non-returnable 25 kg drums |
| Dosing | Feed rate varies with operating conditions; dosing via feed pumps with an auto-degassing wet end is recommended. |
A liquid polyelectrolyte with effective dispersing power, commonly applied together with oxidizing biocides such as chlorine and bromine for an enhanced effect. It improves the performance of recirculating and once-through cooling systems by removing and dispersing fouling deposits.
| Form | Clear amber liquid |
| Packing | Non-returnable 20 kg drums |
| Dosing | Maintain 1000-2000 ppm as product in the circulating water; apply neat or diluted with soft water. |
A low application cost microbiocide for industrial recirculating cooling water, air washers, once-through cooling, water-containing metalworking fluids, and pulp and paper mills. It is highly effective at pH 6.0-8.5 and remains effective at slightly higher pH with upper feed rates.
| Form | Clear yellow/amber liquid |
| Packing | Non-returnable 20 kg pails |
| Dosing | Shot fed 1-3 times per week; typically 3-12 ppm product for bacteria and 30-120 ppm for fungi and algae. |
A silicone-based anti-foaming formula designed to control foaming in cooling water systems. It disperses easily in water and suppresses foam even at low concentrations.
| Form | White liquid |
| Packing | Non-returnable 4 kg and 20 kg drums |
| Dosing | System-dependent; dose until foam is eliminated or reduced to an acceptable level. |
An all-in-one product that acts as a crystallization inhibitor, dispersant and corrosion inhibitor, with hardness stabilizing properties. It treats open recirculating and once-through cooling systems and can be combined with other corrosion inhibitors for a synergetic effect.
| Form | Pale yellow liquid |
| Packing | Non-returnable 20 kg drums |
| Dosing | Fed continuously (shot feeding possible); site-specified concentration controlled by an organic phosphate test. |
A trichlor-based biocide in easy-to-use solid tablet form, highly effective against bacteria, algae and fungi and especially effective at controlling Legionella. Its cyanuric acid content stabilizes active chlorine against UV decomposition, so the chlorine lasts up to four times longer than unstabilized chlorine from gas or bleach.
| Form | Solid white tablet |
| Packing | Non-returnable 20 kg drums |
| Dosing | Initial 0.1-0.5 lbs per 1000 gallons, then maintain at 0.02-0.1 lbs per 1000 gallons via a solid feed system. |
A highly concentrated blend of alkaline buffers, nitrite and an azole metal corrosion inhibitor for closed recirculating water systems and low-pressure boilers. The multi-component blend gives superior protection to steel, copper and a wide range of other metals, and it is compatible with hard or soft makeup water and glycol antifreezes.
| Form | Yellow liquid |
| Packing | Non-returnable 20 kg drums |
| Dosing | Slug dosed until the site-specified concentration is reached; measured via nitrite or sodium nitrite tests. |
A molybdate and organic based corrosion inhibitor for closed recirculating water systems, also applicable to low-pressure boilers. Its concentrated blend of molybdate, alkaline buffers, nitrite and an azole inhibitor protects steel, copper and a wide range of other metals, and is compatible with hard or soft makeup water and glycol antifreezes.
| Form | Yellow to amber liquid |
| Packing | Non-returnable 20 kg drums |
| Dosing | Slug dosed until the site-specified concentration is reached; measured via nitrite or sodium nitrite tests. |
A versatile corrosion inhibitor for closed chilled and hot water systems, also compatible with glycol-dosed systems used to lower the freezing point. Its blend of nitrite, yellow-metal inhibitor and alkali forms a protective film on metal surfaces, maintaining heat transfer efficiency and extending equipment life.
| Form | Clear, pale yellow liquid |
| Packing | Confirmed on quotation |
| Dosing | Initial slug feed 2-3 L per ton of system water after pre-cleaning; maintain nitrite at 250 ppm or above (pH 8.5-9 for galvanized, above 9 for ferrous/cupreous metals). |
An aqueous isothiazolinone biocide that inhibits bacterial growth in closed HVAC systems. In open recirculating cooling towers it also inhibits algae growth and penetrates bacterial slimes.
| Form | Pale yellow liquid |
| Packing | Confirmed on quotation |
| Dosing | Initial slug feed 0.05-0.1 L per ton of system water; then 25-50 ppm monthly for closed systems, or 50-100 ppm about 3 times per week for cooling towers. |
A preoperational cleaner and conditioner for newly constructed piping in open and closed cooling and hot water systems, also suited to existing systems heavily fouled with iron oxides. It removes metal oxide deposits, mill scale and light oils, preconditions exposed metal and forms a corrosion-resistant film (it is not intended for calcium carbonate scale removal).
| Form | Yellow liquid |
| Packing | Non-returnable 20 kg drums |
| Dosing | Slug dosed and recirculated for 8 hours to several days; heating to 30-50 °C improves results; concentration checked via nitrate tests. |
An all-in-one acid neutralizer and hardness stabilizer with an alkaline composition and organic polymers. It neutralizes acid after acid cleaning while preventing scale from forming at the resulting higher pH in hard water.
| Form | Clear amber liquid |
| Packing | Non-returnable 20 kg drums |
| Dosing | Applied continuously as a solution in soft water; dosage depends on alkalinity. |
A special cleaner blend for cooling coils made of aluminium and copper with protective coating. It is free of toxic chemicals, acid and strong alkaline, with built-in corrosion inhibitors.
| Form | Liquid |
| Packing | Non-returnable 20 kg drums |
| Dosing | Apply concentrated or diluted with a low-pressure sprayer, allow 15 minutes to penetrate, then flush thoroughly with fresh water. |
A blend of acids and indicators for removing hardness deposits commonly found in heat exchangers and boilers. Built-in inhibitors protect metals against the acid, making it suitable for systems made of steel, copper or copper alloy.
Used in our cooling tower acid cleaning service.
| Form | Blue liquid |
| Packing | Non-returnable 20 kg drums |
| Dosing | Add 20 kg per 200 kg of circulating water, circulate 4-8 hours, drain and flush; finish with a 5% Freshol 2000 flush to remove residual acid. |
A powdered acid blend with a corrosion inhibitor, designed for removing hardness deposits from equipment such as heat exchangers. Its weak-acid formulation is safer and more convenient than strong acid products while still dissolving scale effectively.
Used in our cooling tower acid cleaning service.
| Form | White solid (powder) |
| Packing | Non-returnable 20 kg drums |
| Dosing | Dilute to a 5% solution before use; about 2 kg removes 1 kg of scale; max 50 °C for aluminium/galvanized systems, up to 70 °C for other metals. |
A powerful pipeline cleaner that removes and disperses dirt and iron oxide from metal surfaces. Instead of aggressive inorganic acid it uses an organic phosphinocarboxylic polymer, so the cleaning solution stays near-neutral (pH about 6.5-7) and is effective at transporting iron.
| Form | Clear pale yellow liquid |
| Packing | Confirmed on quotation |
| Dosing | Pipeline sections: 1-2% solution circulated 2-8 hours; new systems: 1-2 L per 1000 L of system water for 3 days to 2 weeks, then drain, flush and passivate. |
A cleaner that removes stubborn deposits from aluminium coils and air-cooled condensers. It is sprayed onto the coils, left to work briefly, and rinsed off completely with water.
| Form | Liquid |
| Packing | Non-returnable 20 kg drums |
| Dosing | Dilute with 1 part water (full strength for heavy contamination); shut off the system, spray with a low-pressure acid-resistant sprayer, wait 3-5 minutes, rinse completely. |
A dissolvable powder of grease-eating Bacillus bacteria supplied as pre-measured water-soluble refill packets for standard liquid-injection grease trap systems. Mixed with tap water it stays stable as a liquid bacteria solution for up to 60 days, degrading grease, fats, proteins, starch, sugars and cellulose at the source.
| Form | White powder in water-soluble refill packets |
| Packing | 25 lb (11.34 kg) containers and 55 gallon drums (approx. 185 lbs); 0.5 lb and 1 lb water-dissolvable packets |
| Dosing | Mix a 1 lb packet with 5 gallons of warm tap water and inject nightly; drain lines: 500-1500 mL twice weekly depending on pipe size (50-200 mm). |
A solid, bacteria-laden brick that gradually dissolves over 35-120 days for continuous degradation of organic waste in grease traps. The naturally occurring bacteria reduce odor, sludge and fats, oils and grease buildup, degrading grease at the source instead of pushing it downstream.
| Form | Green solid block (2 lb brick) |
| Packing | 4 blocks per case |
| Dosing | Suspend the brick halfway into the grease trap; a 2 lb brick lasts 35-60 days in a 0.5-1 m³ trap with flows under 200 m³/day. |
No products match. Clear the search — or ask us on WhatsApp: the range goes well beyond this page.
Dosing figures are taken from the product data sheets; your quotation confirms the product, dose and pack for your actual system. Product data sheets (PDS) and safety data sheets (SDS) are available on request.
This is the Gotech industrial range: corrosion and scale inhibitors, biocides and biodispersants for open cooling water, nitrite and molybdate inhibitors for closed loops, cleaners and descalers, and grease trap bacteria. Browse by category at the top of this page and enquire on WhatsApp with the product name — or, if you are not sure, start with a free site survey and we will match the chemistry to your water, your metals and how your system runs. The same products are what our treatment programmes and cooling tower treatment dose, test and report on.
A chemical is only as good as the programme around it. Every quotation comes with a dosing recommendation for your system; a full treatment programme adds dosing equipment we set up and maintain, routine testing and a dated report after every visit.
Do not diagnose from a catalogue. Two buildings on the same street can need different chemistry — the right product and dose depend on your make-up water, the metals in your pipework and heat exchangers, your temperatures and your operating pH. The free site survey answers the question properly: we inspect the system, test the water and put the product, dose and price in writing, with no obligation.
If you want numbers before you decide, laboratory testing gives you a water analysis — with HOKLAS-accredited independent laboratory analysis where you need defensible results — and real-time monitoring shows you live readings from the system a programme would control.
This page is not the whole range. Beyond these 26 products sit 40+ further specialty formulations for less common systems and problems — tell us your system and what it is doing, and we will match one.
We deliver Hong Kong-wide from our Kwai Chung base, Monday to Saturday 9:00–18:00.
Gotech supplies its own range of 26 industrial formulations: corrosion and scale inhibitors, biocides and biodispersants for open cooling water, nitrite and molybdate inhibitors for closed chilled and heating loops, cleaners and descalers, and grease trap and drain treatments. Every product is quoted on enquiry and matched to your system after a free site survey.
Yes. Many E&M contractors and facility teams order by product name — send the name on WhatsApp and we reply with a quotation within one working day. Every quotation comes with a dosing recommendation, and a full programme adds dosing equipment, routine testing and dated service reports to the same chemicals.
By request. Every product card on this page has a 'Request the datasheet (PDS)' link that opens WhatsApp with the product name already filled in; safety data sheets are available the same way through our SDS library. We reply within one working day.
Five oxidising biocides in the range are described as especially effective at controlling Legionella: Freshol 1590 (bromine-based liquid), Freshol 1591 (bromine precursor activated with chlorine just before dosing), Freshol 1595T (bromine/chlorine tablet that keeps working at high pH), Freshol 2120 (sodium hypochlorite, 10% active chlorine) and Freshol M90 (stabilised trichlor tablet). Haber A750 is a non-oxidising isothiazolinone biocide for closed HVAC systems that also penetrates slimes in open towers, and Freshol 1386 is a biodispersant that breaks up biofilm so oxidisers can reach the bacteria. Which one suits your tower depends on operating pH, feed equipment and fouling — a free site survey settles it.
Freshol 2242 and Haber A522 are nitrite-based closed system inhibitors with an azole yellow-metal inhibitor and alkaline buffers; Haber A522 is maintained at 250 ppm nitrite or above. Freshol 2263 adds molybdate to the same nitrite-and-azole chemistry. All three protect steel, copper and other metals and are compatible with hard or soft make-up water and glycol antifreezes; they are slug-dosed to a site-specified concentration and checked by nitrite test. Your quotation confirms the product and dose for your loop.
Send system type, approximate volume and the current problem — the message is pre-structured for you. We reply within one working day.
WhatsApp the product name — or tell us the system and the problem — and we reply within one working day.