30,00 €
REX S-120 Catalyst Dispenser
Genuine REX S-120 Catalyst Dispenser professional catalyst dispenser. Engineered for the ultra-precise measurement of MEKP (Methyl Ethyl Ketone Peroxide) and other liquid hardeners. This “squeeze-to-fill” graduated dosimeter eliminates mixing errors in polyester and vinylester resin applications, ensuring a perfect cure every time.
The REX S-120 Catalyst Dispenser is the industry standard for manual dosing in the marine and composite sectors. When working with resins, the difference between a successful hull lamination and a structural failure often comes down to a single milliliter of catalyst.
The REX system uses a clever integrated graduated cylinder sitting atop a flexible reservoir. By squeezing the bottle, the catalyst is forced up into the calibrated chamber. Once you reach the desired mark (e.g., 15ml for a 1kg batch at 1.5%), you simply stop squeezing, and the excess drains back into the bottle. This ensures zero waste and, more importantly, zero skin contact with hazardous chemicals. It is built from high-density, peroxide-resistant polymers that will not crack or cloud over time.
✔ Genuine REX Engineering → Durable, chemical-resistant construction for long-term workshop use.
✔ Squeeze-to-Fill Logic → Fast, repeatable, and incredibly accurate dosing without pouring.
✔ Internal Overflow System → Automatically returns excess liquid to the reservoir, preventing over-dosage.
✔ Crystal Clear Graduations → High-contrast markings in milliliters (ml) for instant reading.
✔ Closed System Safety → Minimizes exposure to corrosive catalyst vapors and accidental splashes.
Brand: REX
Model: S-120
Function: Manual Precision Dosimeter
Fluid Compatibility: MEKP (Catalyst), Hardener, Cobalt Accelerators
Scale: Metric (Milliliters)
Body Material: Chemical-grade, translucent PE (Polyethylene)
🔹 Application Instructions
Prepare: Calculate the volume of catalyst needed (e.g., 2% for 500g of resin = 10ml).
Squeeze: Gently squeeze the REX bottle until the liquid reaches the 10ml line in the top chamber.
Release: Stop squeezing; the valve ensures the measured 10ml stays in the cup while the rest drops back down.
Pour: Tilt the bottle to pour the measured 10ml directly into your resin mixing jug.
Secure: Always keep the small nozzle cap on when not in use to keep the catalyst “fresh” and prevent spills.
👉 Pro Tip: In the shipyard, the REX S-120 is your best friend for Gelcoat repairs. Because repair batches are usually small (100g–200g), even a 1ml error is massive. The REX allows you to hit the 2ml mark exactly, ensuring the patch cures correctly without turning yellow or staying soft.
Yacht Maintenance: Precise catalyst dosing for fiberglass hull repairs and structural bonding.
In-Mold Gelcoating: Ensuring the first layer of a new boat part has the perfect chemical “kick.”
Composite Manufacturing: Essential for carbon fiber and GRP workshops using hand-layup techniques.
Industrial Molding: Dosing hardeners for polyurethane or polyester castings.
Model REX S-120: Complete Professional Catalyst Dosimeter
Absolute precision in your chemical ratios, leading to maximum mechanical strength, consistent gel times, and a safer, cleaner workshop environment.
“A reliable company, professional-quality products, quantities suitable for DIY projects, prompt phone support, and professional technical advice at reasonable prices—finally, a go-to place! Well done 👍”
“An excellent salesperson who, above all, knows his stuff—he understands what he’s selling and clearly explains how to use it, providing all the necessary information. Plus, the products are high-quality and offer excellent value for money. The owner and his staff are kind and professional in a way that’s hard to find anywhere else these days.”
