If you install resin bound driveways, you already know how unforgiving cured polyurethane resin can be. The same properties that make it perfect for a tough, long-lasting driveway surface — extreme hardness, chemical resistance, and exceptional bond strength — make it a serious problem when it builds up on your forced action pan mixer, power pole trowel, screed sledge, trowels, and spazzles.
Most installers start out using Xylene to clean wet, uncured resin off tools at the end of a job. And while Xylene works well on fresh, uncured PU, it’s almost impossible to get your tools 100% clean before the resin starts to cure. The residues left behind harden overnight into a solid, tenacious coating that Xylene — and virtually every other solvent — simply cannot shift.
This guide explains why cured PU resin is so difficult to remove from tools, what actually works, and how to use EN706 GEL to keep your equipment clean, extend its working life, and protect your investment.
Why Keeping Your Resin Tools Clean Matters
It’s easy to let tool cleaning slip, especially at the end of a long installation day. But cured resin build-up has real consequences for the quality of your work and the lifespan of your equipment:
- A forced action pan mixer with resin build-up loses effective mixing capacity — the cured residue reduces the usable volume and can affect the consistency of your mix
- Power pole trowel blades caked in hardened resin leave uneven marks and ridges in the finished surface, compromising the quality of the final result
- Trowels and spazzles with resin build-up drag and catch on the surface, making levelling and finishing significantly harder
- Replacement costs add up fast — new power pole blades, trowels, and mixer paddles are expensive, and a neglected mixer drum can become unusable
A few minutes of cleaning at the end of every job will save you significant money and effort in the long run — and deliver a better finish for your customer.
Why Xylene Stops Working Once Resin Has Cured
Xylene is the go-to solvent for resin bound installers when cleaning tools during and immediately after a job, and it works well on wet, uncured PU resin. But there is a critical window: once the polyurethane resin begins to cure — through the chemical reaction between the polyurethane base and the isocyanate hardener — the molecular structure changes fundamentally.
Cured PU resin has cross-linked polymer chains that are highly resistant to standard organic solvents. Xylene, acetone, white spirit, and similar products cannot penetrate these bonds effectively. You might soften the very surface layer, but you will not dissolve or remove properly cured PU with solvents alone.
This is why installers who try to clean tools with Xylene after the resin has begun to harden find it has little effect — and why scraping, chipping, and sanding are so time-consuming and often damage the tool surfaces in the process.
Do not waste time trying to sand or grind cured resin off mixer drums or trowel blades — this risks damaging the tool and still leaves residue behind. There is a better way.
The Solution: EN706 GEL for Cured PU Resin Removal
EN706 GEL is the product used and recommended by resin bound driveway manufacturers and professional installers for removing cured polyurethane resin from tools and equipment. Unlike liquid solvents that run off tool surfaces and evaporate before they can work, EN706 GEL is formulated as a very thick gel that stays exactly where you put it.
It works by penetrating the cured PU resin and triggering a chemical reaction that breaks the internal cross-linked bonds of the polyurethane. This causes the resin to swell and soften from the inside out, making it easy to wipe, brush, or scrape away cleanly — without damaging the underlying tool surface.
EN706 GEL is available in a 5-litre container and is economical to use — a little goes a long way when applied correctly. It is the same product used to remove PU resin spills from paving, concrete, and brick on site, making it a genuinely versatile addition to any resin installer’s kit.
Step-by-Step: How to Clean Cured PU Resin from Your Tools Using EN706 GEL
What You Will Need
- EN706 GEL
- A brush (an old paintbrush works well for applying the gel)
- Plastic scraper or stiff-bristle brush
- Clean rags or cloths
- Water for rinsing
- Gloves and eye protection
Step 1: Apply EN706 GEL at the End of the Job
The best time to apply EN706 GEL is at the end of each installation day, before the resin residue has had a chance to fully harden. However, it is equally effective on fully cured, long-standing residue — it simply may need longer dwell time.
- Using a brush, coat all areas of the tool covered by cured or partially cured PU resin with EN706 GEL
- Apply generously — ensure the gel fully covers the resin residue and makes good contact with the surface
- The thick consistency of the gel means it will stay in place on vertical surfaces, inside mixer drums, and on blade edges without running off
Step 2: Leave Overnight to React
EN706 GEL needs time to penetrate the cured resin and break down its bonds. Leave it to work for a minimum of 12 hours — overnight is ideal and fits naturally into the end-of-day routine for most installers.
Make applying EN706 GEL part of your standard end-of-job process, just like cleaning your van or packing down equipment. Apply it before you leave site or before loading tools onto the van, and it will be ready to clean off the next morning.
If leaving tools outdoors overnight, cover them with a tarpaulin or move them undercover to prevent rain washing the gel away before it has finished reacting.
Step 3: Remove the Softened Resin
- The following day, inspect the treated areas — the resin should appear swollen and softened
- Use a plastic scraper, stiff brush, or cloth to remove the softened PU residue — it should come away cleanly and easily
- For mixer drums, work around the inside surface methodically with a stiff brush
- For trowel and power pole blades, wipe firmly with a cloth or use a scraper along the blade edge
- For spazzles and hand trowels, a stiff brush is usually sufficient
Step 4: Rinse and Inspect
- Rinse the tool thoroughly with clean water to remove all gel and resin residue
- Inspect the surface — for heavy, long-standing build-up, a second application overnight may be needed
- Once clean, dry tools before storage to prevent rust on metal surfaces
Tool-by-Tool Guide: Cleaning Resin Build-Up with EN706 GEL
| Tool | Application Method | Removal Method |
| Forced action pan mixer | Brush gel onto drum interior and paddle arms — work it into all resin-coated areas | Stiff brush around drum interior; wipe paddle arms with cloth |
| Power pole trowel blades | Brush gel evenly across both faces of each blade | Wipe firmly with cloth or scraper along blade edge |
| Resin bound screed sledge | Coat the underside and side edges where resin accumulates | Scraper followed by stiff brush; rinse thoroughly |
| Hand trowels | Apply gel to both faces and the edges | Stiff brush or cloth wipe; rinse and dry to prevent rust |
| Spazzles | Coat the rubber edge and any resin on the frame | Cloth wipe or stiff brush; rinse well |
The Cost of Not Cleaning Your Tools — and the Savings EN706 GEL Delivers
Consider the real costs involved when tools are allowed to become caked with cured resin:
- Power pole trowel blade sets can cost hundreds of pounds to replace — build-up of resin accelerates wear and uneven surfaces reduce blade life
- A forced action pan mixer represents a significant capital investment; a drum that becomes unusable due to resin build-up is an expensive and avoidable loss
- Hand trowels and spazzles are relatively cheap individually, but replacing them repeatedly across a busy installation schedule adds up
- Time spent scraping, grinding, or chipping hardened resin off tools is unbillable time that could be spent on the next job
A 5-litre container of EN706 GEL, used as part of a regular end-of-job cleaning routine, costs a fraction of the price of replacement tools and dramatically extends the working life of your equipment.
Safety When Using EN706 GEL
- Always read the product safety data sheet before first use
- Wear chemical-resistant gloves (nitrile or neoprene) when applying and removing the gel
- Protect your eyes with safety goggles
- Use in a well-ventilated area or outdoors where possible
- Keep the product away from children
- Dispose of removed resin residue and used materials in accordance with local waste regulations
Frequently Asked Questions
Can I use EN706 GEL on tools that haven’t been cleaned for weeks or months?
Yes. EN706 GEL is effective on fully cured and long-standing PU resin build-up, not just fresh residue. Very heavy or old build-up may require two or more overnight applications, but the gel will work through multiple layers given sufficient dwell time.
Will EN706 GEL damage the metal surfaces of my tools?
When used as directed, EN706 GEL is designed to target and break down polyurethane resin without damaging the underlying metal surfaces of tools and equipment. Always rinse thoroughly after use and dry metal surfaces to prevent rust.
Can I use EN706 GEL to clean resin off site surfaces like paving and concrete?
Yes — EN706 GEL is the same product recommended for removing PU resin spills from paving, block paving, concrete, and brick on site. It is a versatile product that works on both tools and hard surfaces, making it a practical addition to any resin installer’s kit.
How much EN706 GEL do I need per job?
The amount needed depends on the extent of the build-up and the number of tools being cleaned. Because it is a thick gel applied in a targeted manner, it is economical to use — a 5-litre container will cover multiple cleaning sessions for a standard set of installation tools.
Is there anything EN706 GEL won’t remove cured resin from?
EN706 GEL is highly effective on metal tools, paving, concrete, and brick. For other materials — rubber seals, plastic components, painted surfaces — it is advisable to test on a small area first or consult the product manufacturer.
Make EN706 GEL Part of Your Standard Installation Kit
Cured PU resin build-up on tools is an occupational fact of life for resin bound driveway installers — but it doesn’t have to mean damaged equipment, poor finishes, or expensive replacements. EN706 GEL provides a simple, effective, and economical solution that fits naturally into the end-of-day routine.
Apply it at the end of every job, leave it overnight, and remove the softened residue the following morning. Your mixer drum stays at full capacity, your blades stay smooth, your trowels and spazzles perform as they should — and your tools last significantly longer.
Used by both professional installers and resin manufacturers, EN706 GEL is the professional’s choice for keeping resin bound installation equipment in peak condition.
