Cleaning supplies
by Power Clean
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99% isopropyl alcohol is a fast-evaporating solvent and disinfectant that leaves zero residue on surfaces, tools, and equipment. This 750 ml bottle is your first line of defence against contamination when cultivating mushrooms or maintaining a clean grow space. One careless fingerprint on a still air box, one unwiped scalpel — that's all it takes to lose an entire batch. This stuff stops that from happening.
| Spec | Value |
|---|---|
| Concentration | 99% isopropyl alcohol (IPA) |
| Volume | 750 ml |
| Evaporation | Fast — leaves no residue |
| SKU | HS1609 |
| Primary use | Surface and tool sterilisation |
| Also known as | IPA, isopropanol, rubbing alcohol (though rubbing alcohol is typically 70%) |
Contamination is the number one reason grow projects fail. Not lighting, not temperature, not genetics — contamination. We've seen it hundreds of times over 25+ years behind the counter: someone invests in a solid grow kit, follows every step, then loses the whole flush to a green mould bloom because they didn't sterilise their workspace properly. It's gutting, and it's almost always preventable.
The reason you want 99% concentration rather than the more common 70% is the evaporation speed. At 99%, isopropyl alcohol evaporates in seconds and leaves absolutely nothing behind — no water, no film, no residue. That matters when you're wiping down the inside of a still air box or prepping a surface for agar work. The 70% version is actually better for skin disinfection (the water helps it penetrate cell walls of bacteria), but for hard surfaces and tools in a cultivation context, 99% is the standard. It flashes off fast, so you can get straight to work without waiting for things to dry.
One honest limitation: the stuff has a sharp chemical smell. It dissipates quickly once the alcohol evaporates, but if you're working in a small room with poor ventilation, crack a window. Prolonged inhalation in an enclosed space is not pleasant and can cause headaches. Work smart — brief exposure during a wipe-down is fine, but don't sit there huffing the bottle.
Here's something we tell every first-time grower who walks into the shop: gloves and isopropyl alcohol are the cheapest insurance you'll ever buy. A 750 ml bottle of 99% IPA costs a fraction of a single grow kit, yet it protects your entire investment. We've watched people spend serious money on premium substrates and controlled environments, then contaminate everything because they reached into the still air box without wiping down first. It's a 30-second step that saves weeks of waiting and a bin full of ruined substrate.
The other thing worth knowing: 99% isopropyl alcohol is also brilliant for cleaning glass. Bong resin, pipe buildup, vaporiser residue — a soak in IPA cuts through it faster than any branded cleaning solution, and it costs less. Pour some in, add coarse salt as an abrasive if needed, shake, rinse with warm water. Done. That's a secondary use, but it's why most of our customers end up buying this bottle more than once.
Complete your sterile setup with latex or nitrile gloves and a still air box. If you're starting a mushroom grow, pair this 99% isopropyl alcohol with one of our all-in-one grow kits — the kit provides the colonised substrate, and the IPA keeps everything around it clean. For glass cleaning, grab some pipe cleaners and coarse salt to go with it.
| Feature | 99% IPA | 70% IPA |
|---|---|---|
| Evaporation speed | Very fast (seconds) | Slower (leaves moisture) |
| Residue | None | Minimal water residue |
| Best for | Hard surfaces, tools, glass cleaning | Skin disinfection, wound care |
| Cultivation use | Standard choice — fast, clean, no moisture | Works but leaves water on surfaces |
| Flammability | Highly flammable | Flammable |
| Smell intensity | Strong (brief) | Moderate |
For grow room sterilisation, 99% is the better pick. The lack of residue means you're not introducing any moisture to surfaces that need to stay dry. If you're only after a general household disinfectant, 70% is actually more effective at killing bacteria on skin — but that's not what this bottle is for.
It sterilises surfaces, tools, and the inside of still air boxes before and during inoculation or transfers. The 99% concentration evaporates in seconds without leaving moisture or residue, which is critical when working with substrates that are sensitive to contamination. Wipe everything down before every session — no exceptions.
Yes, and it works brilliantly. Pour IPA into the glass piece, add a tablespoon of coarse salt as an abrasive, cover the openings, and shake vigorously. Rinse thoroughly with warm water afterwards. It cuts through resin faster than most branded cleaning products and costs a lot less per use.
In normal use — wiping down surfaces and tools — it's fine. The vapour dissipates quickly. Just make sure you have some ventilation: an open window or a fan. Don't use it near open flames or heat sources, and don't breathe it in deliberately. Brief exposure during a wipe-down is not a concern.
The 99% version evaporates almost instantly and leaves zero residue — no water, no film. That's what you want on hard surfaces and metal tools in a cultivation setting. The 70% version leaves a thin layer of moisture, which can be counterproductive when you need dry, sterile surfaces ready to go immediately.
Depends on how often you grow. For a single mushroom grow kit cycle with 2–3 flushes, one 750 ml bottle is more than enough. If you're also using it for glass cleaning or running multiple projects, you'll get through it in a few weeks. It's cheap enough to keep a spare on hand — running out mid-session is not ideal.
No. IPA is for surfaces and tools, not for substrates. Substrate and grain sterilisation requires heat — a pressure cooker or steam sterilisation. Use isopropyl alcohol on the outside of jars, on your workspace, on your hands (over gloves), and on instruments. It's a surface disinfectant, not a substrate treatment.
Very. Keep it away from open flames, heaters, stoves, and direct sunlight. Store it sealed at room temperature in a cupboard. Don't smoke while using it. The vapour is heavier than air and can accumulate near the floor in poorly ventilated spaces, so keep airflow moving when you're using larger amounts.
Last updated: April 2026
