Polyaspartic Cure Time Explained: Pot Life, Recoat & Return-to-Service
Every time on the TDS is rated at one reference temperature — here is how much colder or hotter conditions actually move pot life, recoat, and full cure.
Enter your product’s TDS cure times (rated at roughly 70°F) and the day’s actual temperature — the calculator scales pot life, foot traffic, recoat window, light vehicle, and full cure together using a standard doubling-rate model. At exactly 70°F the numbers come back unchanged; colder stretches every one of them, warmer compresses them.
How to read the inputs
Temperature & Humidity
- Use the lower of air and floor (slab) temperature at application time — humidity only flags blushing risk, it doesn’t change the timing math
Product Cure Times
- Quick-fill Fast, Medium, or Slow, then edit to match your actual product’s TDS values at 70°F
Warnings
- Below 41°F most polyaspartics won’t cure properly; above 100°F pot life can get dangerously short
Cure Timeline
- Five results, all scaled together by the same temperature factor — pot life, foot traffic, recoat window, light vehicles, full cure
Worked example
At exactly 70°F — the reference temperature — a medium-speed product’s times come back unscaled: 20 min pot life, 1 hr foot traffic, a 2–4 hr recoat window, light vehicles at 8 hr, and full cure at 24 hr. Drop the same product to 50°F and curing runs about 2.2× slower — pot life stretches to 43 min, more than double, because every field scales by the same temperature factor together. That’s the entire value of entering a real temperature instead of trusting the TDS number as a flat constant.
Try it at your jobsite temperature
Quick-fill a product speed, then enter today's actual temperature to see how far it shifts pot life and the recoat window.
Full tool scales all five cure-time stats together and flags temperature or humidity risk.
Open the live calculator →Common mistakes
- Reading the TDS times as fixed numbers instead of a 70°F baseline that shifts with the day’s actual temperature
- Missing the recoat window on either edge — too early traps solvents or gases escaping from the coat below, too late means the surface has cured too hard to bond
- Ignoring the humidity warning because it doesn’t change the timing — high humidity is a separate blushing and haze risk worth checking against your TDS
- Applying below about 41°F expecting a merely slow cure — many polyaspartics simply won’t cure properly that cold
Grinding and coating on the same day? Line up your prep time against these cure windows — see how long concrete grinding takes.
Frequently Asked Questions
Why do I need to enter a temperature — doesn’t the TDS just give one number?
TDS cure times are rated at a reference temperature, usually around 70°F / 21°C. Real jobsite temperatures are rarely exactly that, and cure chemistry is temperature-driven, so pot life, the recoat window, and full cure all shift with the day’s conditions. The calculator applies a standard doubling-rate model to scale your product’s rated times to the temperature you actually enter.
What is the doubling-rate model, in plain English?
Cure rate roughly doubles for every 10°C (18°F) warmer than the reference temperature, and roughly halves for every 10°C colder — a standard rule of thumb for temperature-driven reaction rates. The calculator applies that scaling factor to all six cure-time fields at once, so a colder day stretches every number together, not just one.
What actually happens if I miss the recoat window?
It’s the most common cause of intercoat adhesion failure, and it can go wrong on either edge of the window. Recoat too early and solvents or gases still escaping from the coat below get trapped, causing bubbling. Recoat too late and the surface has already cured hard enough that the next coat can’t chemically bond to it — both edges matter, not just the minimum wait time.
Why does humidity matter if it doesn’t change the timing calculation?
Humidity doesn’t factor into the cure-time math, but very humid air raises the risk of surface blushing, hazing, or trapped moisture — above roughly 85–90% relative humidity that risk climbs sharply. Check your product’s humidity limit in its TDS separately from the timing estimate.