Hesi Smell-Away Smell-Ex Odour Neutralising Blocks
Hesi Smell-Away Smell-Ex Odour Neutralising Blocks
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Order by 3pm Mon–Fri — we aim to post same day · FREE Express Delivery over £60 · 1–2 working days · Free Wembley pickup
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Solid blocks that neutralise odour rather than masking it
Hesi Smell-Away, also sold as Smell-Ex, is a set of solid gel blocks that neutralise airborne odour molecules. They are placed in the room or near the extraction outlet and work passively - no power, no plumbing and nothing to maintain.
Key Benefits
- Neutralises rather than perfumes - it reacts with odour molecules instead of covering them
- Completely passive - no power, no fan, nothing to service
- Two block sizes - 10g for a tent or a small room, 19g for a larger space
- Useful as a backstop - catches what escapes past a carbon filter
- Simple to place - near the extraction outlet or in the room itself
Odour escaping past a filter that is working perfectly
A carbon filter only treats the air that passes through it. Anything escaping through a tent zip, a door or a positive-pressure leak is untouched - which is why a room can smell in the hallway while the extraction is doing its job.
How to Use
- Placement: near the extraction outlet, or in the room for general control
- Coverage: one 10g block per small tent; 19g blocks for a room
- Life: typically several weeks, depending on airflow and temperature
- Not a substitute: use alongside carbon extraction, not instead of it
- When to replace: when the block has visibly shrunk and odour returns
Technical Specifications
- Type: Passive odour neutralising gel blocks
- Also sold as: Smell-Ex
- Block sizes: 10g and 19g
- Pack options: 3 x 10g, 7 x 10g, 3 x 19g, 8 x 19g
- Power required: None
- Use with: Carbon extraction

FREE Express Delivery on orders over £60. We aim to post same day for next-working-day arrival — order by 3pm Mon–Fri. Delivery is 1–2 working days. A few harder-to-stock or large, bulky items can take a little longer — we'll tell you if that applies to your order. Heavy-item surcharges are always shown at checkout before you pay — we only ever charge what delivery costs us. Prefer to collect? Free pickup at our Wembley store.