Plastic Steel Putty (A)
Two-part putty (all sizes) · US · not yet reviewed
How long before you can sand Devcon Plastic Steel Putty (A)?
Short answer
Bond-strength path
Assembly, handling and full load are different stages
Calculate bond readiness
Your countdown
Stated times
- Working time ends45 minutes
- Ready to sand4 hours
- Full cure16 hours
From Devcon data sheet · checked 2026-10-25. Anything not listed isn’t stated by the manufacturer.
Manufacturer website: itwperformancepolymers.com
Conditions & fine print
- Stated conditions: 75°F (24°C)
- Ideal application temperature is 55-90°F. Below 70°F, cure and pot life lengthen; in cold conditions Devcon recommends preheating the repair area to 100-110°F and holding it through cure. Avoid application above 85% relative humidity.
- Temperature range: 55°F to 90°F
- Region US. Formulas can differ between countries; check your container.
- Working time ends: 75°F (24°C); shorter above 70°F, longer below
- Full cure: 75°F (24°C)
- Entered from the manufacturer source; second review pending. Report outdated information
- Actual results depend on preparation, thickness, ventilation, temperature, humidity, mixing and substrate.
Using this specific product
Devcon Plastic Steel Putty (A) is listed here as the Two-part putty (all sizes) version for metal repair and machining. For mixing and curing epoxy, the useful question is not simply whether the surface looks finished—it is whether the exact next-action milestone shown above has been reached.
Before you start
- Confirm the package says Two-part putty (all sizes); related versions can use different timing.
- For metal repair and machining, pay particular attention to mix ratio, batch size, temperature and pour thickness.
- 75°F (24°C); shorter above 70°F, longer below. 75°F (24°C).
How to check readiness
Check the coolest or thickest part for firmness before sanding, demolding or loading. Pot life: 45 minutes at 75°F. Allow material to cure for at least four hours before machining (do not wait more than 24 hours). Reserve full cure for demanding use, chemicals, washing, immersion or load—not merely gentle handling.
Avoid this mistake
A larger batch can heat faster while a thin film may cure more slowly.
Questions
How long before you can sand this product?
Devcon states: Pot life: 45 minutes at 75°F. Conditions: 75°F (24°C); shorter above 70°F, longer below. Allow material to cure for at least four hours before machining (do not wait more than 24 hours). Functional cure and full cure: 16 hours. Conditions: 75°F (24°C). These are the manufacturer’s stated times, not a guarantee.
How long does this product take to fully cure?
Devcon states: Functional cure and full cure: 16 hours. Conditions: 75°F (24°C). These are the manufacturer’s stated times, not a guarantee.
How long do I have to work with this product?
Devcon states: Pot life: 45 minutes at 75°F. Conditions: 75°F (24°C); shorter above 70°F, longer below. These are the manufacturer’s stated times, not a guarantee.
What affects how long this product takes to dry or cure?
Ideal application temperature is 55-90°F. Below 70°F, cure and pot life lengthen; in cold conditions Devcon recommends preheating the repair area to 100-110°F and holding it through cure. Avoid application above 85% relative humidity. Follow the product label for your conditions.