U-POL System 20 UP2303 National Rule Fast Hardener, 1 L
U-POL System 20 UP2303 National Rule Fast Hardener, 1 L
SKU:UP2303
The fast hardener in U-POL's System 20 range, for U-POL 2K primers and clearcoats. Use it in cooler shops and for spot and panel repairs; step to standard or slow hardener as the temperature climbs.
- Shop temperature range
- 50–80°F
- Tin
- 1 L
- Tins per carton
- 6
- Shelf life, unopened
- 2 yrs
System 20 hardeners
| Hardener | Speed | Temperature |
|---|---|---|
| UP2303 (this product) | Fast | 50–80°F |
| UP2323 | Standard | 60–90°F |
| UP2333 | Slow | 70–100°F |
Mix ratios
| U-POL product | Type | Ratio |
|---|---|---|
| UP2892 | Spot/panel clear | 4:1 |
| UP2882 | Universal clear | 4:1 |
| UP2821 / UP2822, UP2802 | HS clears | 2:1 |
| UP2253 | High-build primer | 4:1 filler; 4:1:1 surfacer |
Speed it up, don't pour it back. U-POL says 2–3% Rocket accelerator (UP0735), about 30 ml per litre of hardener, cuts dry times by 30–50%. Never return activated material to the original can.
Mixing
- Pick the hardener speed for your shop temperature: fast at 50–80°F.
- Measure the clear or primer, then add UP2303 at the ratio on that product's TDS.
- Stir thoroughly and use within the product's pot life.
- Reseal the can tightly and store it upright, cool and dry.
Tech specs
| Part number | UP2303 (S2030/1) |
|---|---|
| Size | 1 L tin, 6 per carton |
| Speed | Fast, 50–80°F |
| For | U-POL 2K primers and clearcoats |
| Rule | National Rule |
| Chemistry | HDI polyisocyanate |
| Shelf life | 2 years |
| Hazmat | UN1263, Class 3, PG II |
| Other sizes | UP2302 500 mL, UP2305 2.5 L, UP2307 250 mL |
Related
FAQ
What does it work with?
U-POL 2K primers and clearcoats, such as UP2253, UP2892, UP2882, UP2821/UP2822 and UP2802.
When should I use fast hardener?
In cooler shops, 50–80°F, and for spot and panel repairs. Use standard at 60–90°F and slow at 70–100°F.
What's the mix ratio?
It depends on the product: 4:1 for UP2892, UP2882 and UP2253, and 2:1 for the HS clears.
How does it ship?
As UN1263, Class 3, Packing Group II flammable liquid.
How long does it keep?
2 years unopened. Keep it cool, dry and tightly closed.
Manufacturer documents: U-POL product pageUP2892 TDS (PDF)UP2253 TDS (PDF)
Regular price
$35.94
Regular price
Sale price
$35.94
Shipping calculated at checkout.
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- Ships in 1–2 business days from Eugene, OR — solvent-based items ship ground only
- Free ground shipping over $425 · $9.99 under
- 30-day returns on unopened, resalable items
In stock
Technical details
General
- Part number
- UP2303
- Brand
- U-POL
- Product type
- Clearcoats & Activators
U-POL System 20 UP2303 National Rule Fast Hardener, 1 L
$35.94