Roundup

Rainfast Super Concentrate Weed & Grass Killer

Concentrate glyphosate herbicide · US · manufacturer-sourced

Check your container: This countdown is for the Concentrate glyphosate herbicide variant. Similar-looking versions may have different times.

How long before Roundup Rainfast Super Concentrate Weed & Grass Killer can get rained on?

Short answer

Rain-safe: 2 hours after application.
Lawn and garden treatments

Application-and-reentry plan

Rainfast time and re-entry time answer different questions

  1. Apply the Concentrate glyphosate herbicide per the label
  2. Keep people and pets out for the stated time
  3. Hold off watering or mowing until the label says

This product’s stated stages Quoted at 73°F

  • Rain-ready2 hours

Worth noticing: The manufacturer states only one timing here (rain-ready, 2 hours); nothing else is inferred.

Common mistake: Treating rainfast time as re-entry time.

Lawn and garden treatments

Treatment safety gate

Elapsed time is only one condition for the next action

Time alone does not clear the next step

Rainfast time is not people/pet re-entry time. Follow the current label for each question separately.

Exact version
Concentrate glyphosate herbicide
Intended use
weeds, lawn renovation, and driveways

Time re-entry and rainfast

When did you apply it?

Stated times

  • Rain-safe2 hours

From Roundup data sheet · checked 2026-10-25. Anything not listed isn’t stated by the manufacturer.

Manufacturer website: roundup.com

Conditions & fine print
  • Stated conditions: 73°F (23°C)
  • This is a 1998 stamped label. Formulas and directions have changed. Follow the label on the bottle you hold.
  • Region US. Formulas can differ between countries; check your container.
  • Rain-safe: The source gives no conditions for this time.
  • Entered from the cited manufacturer documentation. Check the current label for the exact formula and region. Report outdated information
  • Actual results depend on preparation, thickness, ventilation, temperature, humidity, mixing and substrate.

Confirm this is your product

Closely named formulas, colors and regional versions can use different times. Match these details to your container before starting a countdown.

Exact listing
Roundup Rainfast Super Concentrate Weed & Grass Killer
Variant
Concentrate glyphosate herbicide
Region
US
Listed use
weeds, lawn renovation, driveways
Timed stages recorded
rain ready
Source checked
2026-10-25

Documentation: Technical data sheet · EPA label, stamped 1998

Condition attached to the stated time: The source gives no conditions for this time.

About this product

An older EPA-stamped label for a concentrate that advertises being rain-proof in 2 hours. The replanting waits are the interesting numbers: 1 day for ornamentals, 3 days for listed vegetables, 7 days for lawn grass and 30 days for tomato transplants.

Using this specific product

Roundup Rainfast Super Concentrate Weed & Grass Killer is listed here as the Concentrate glyphosate herbicide version for weeds, lawn renovation, and driveways. For treating a lawn or garden area, 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 Concentrate glyphosate herbicide; related versions can use different timing.
  • For weeds, lawn renovation, and driveways, pay particular attention to wind, dry foliage, application rate and forecast.
  • The source gives no conditions for this time.

How to check readiness

Use the rainfast claim only for rain; use the label separately for people and pet re-entry. Use this only as the rainfast milestone. It does not establish general cure or re-entry safety.

Avoid this mistake

Rainfast does not mean dry, harmless or ready for people and pets.

Compare with similar products

Keep going

Questions

How long before this product can get rained on?

Roundup states: The label says it is rain-proof in 2 hours and to reapply if it rains within 2 hours. Conditions: The source gives no conditions for this time.. These are the manufacturer’s stated times, not a guarantee.

How long after Roundup Rainfast before I can replant lawn?

The label says to wait 7 days after the last application to rake, till or replant with seed or sod. Ornamental flowers, trees and shrubs may be planted after 1 day, and tomato transplants after 30 days.

What affects how long this product takes to dry or cure?

This is a 1998 stamped label. Formulas and directions have changed. Follow the label on the bottle you hold. Follow the product label for your conditions.

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