Henry

487 100% Silicone White Roof Coating

Canadian data sheet · CA · manufacturer-sourced

Check your container: This countdown is for the Canadian data sheet variant. Similar-looking versions may have different times.

How long does Henry 487 100% Silicone White Roof Coating take to dry?

Short answer

Tack-free: 1–2 hours after application.
Rain-safe: 15 minutes after application.
Paint, primer & patch

Coat-by-coat plan

Touch-dry, recoat and washable are three different dates

  1. Cut in and roll the Canadian data sheet in even coats
  2. Wait for the recoat time, not touch-dry
  3. Hold off scrubbing until the cure time

This product’s stated stages

  • Rain-ready15 minutes
  • Tack-free1–2 hours
  • Curing period2–6 hours
  • Recoat window closes2 days

Worth noticing: Rain-ready at 15 minutes; recoat window closes at 2 days.

Common mistake: Closing the door or hanging pictures once the wall feels dry, long before the film has hardened.

Paint, primer & patch

Coat timeline

Plan the next coat and final use separately

  1. 1
    ApplyUse the Canadian data sheet directions and prepare for roof coating, silicone roof, and flat roof.
  2. 2
    Next coatUse the listed recoat milestone; do not substitute touch-dry time.
  3. 3
    Normal useWait for the applicable handling, water or cure milestone.

Plan the next coat

When did this coat go on?
Conditions that affect drying
Where?
Thickness

Stated times

  • Tack-free1–2 hours
  • Recoat window closes2 days
  • Rain-safe15 minutes
  • Curing period complete2–6 hours

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

Manufacturer website: henry.com

Conditions & fine print
  • Stated conditions: Not stated in the data sheet
  • Drying and recoat times change with temperature, humidity, film thickness and airflow. Follow the current label. The data sheet advises against applying if rain is expected within 15 minutes. It lists a recoat cure of 24 hours and a final cure of 48 hours under its NSF protocol at 100°F. Canadian data sheet.
  • Region CA. Formulas can differ between countries; check your container.
  • Tack-free: The source gives no conditions for this time.
  • Recoat window closes: The source gives no conditions for this time.
  • Rain-safe: The source gives no conditions for this time.
  • Curing period complete: 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
Henry 487 100% Silicone White Roof Coating
Variant
Canadian data sheet
Region
CA
Listed use
roof coating, silicone roof, flat roof
Timed stages recorded
tack free, recoat max, rain ready, cure period
Source checked
2026-10-25

Documentation: Technical data sheet · 9/17/2019

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

About this product

A 100% silicone roof coating whose headline spec is how fast it stands up to rain: the data sheet lists rain-safe in 15 minutes. The recoat rule runs the other way, with an upper limit of 48 hours for adding coats.

Using this specific product

Henry 487 100% Silicone White Roof Coating is listed here as the Canadian data sheet version for roof coating, silicone roof, and flat roof. For painting, 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 Canadian data sheet; related versions can use different timing.
  • For roof coating, silicone roof, and flat roof, pay particular attention to surface preparation, coat thickness and ventilation.
  • The source gives no conditions for this time.

How to check readiness

Test an inconspicuous area for firmness and blocking before normal use. The data sheet gives a tack-free time of 1 to 2 hours. The data sheet says to apply additional coats within 48 hours. Use this only as the rainfast milestone. It does not establish general cure or re-entry safety.

Avoid this mistake

Recoating too early can trap solvent or water; waiting much longer may require scuffing under the label directions.

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Keep going

Questions

How long does this product take to dry?

Henry states: The data sheet gives a tack-free time of 1 to 2 hours. Conditions: The source gives no conditions for this time.. The data sheet says to apply additional coats within 48 hours. Conditions: The source gives no conditions for this time.. The data sheet's feature list says the coating is rain-safe in 15 minutes. Conditions: The source gives no conditions for this time.. The data sheet gives a cure time of 2 to 6 hours, depending on weather. Conditions: The source gives no conditions for this time.. These are the manufacturer’s stated times, not a guarantee.

What happens if I wait longer than 48 hours to put a second coat of Henry 487?

The data sheet says to apply additional coats within 48 hours. It does not describe what to do after that, so check with Henry before recoating a cured coat, since silicone surfaces can be hard for fresh coatings to grip.

How long before this product can get rained on?

Henry states: The data sheet's feature list says the coating is rain-safe in 15 minutes. Conditions: The source gives no conditions for this time.. These are the manufacturer’s stated times, not a guarantee.

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

Drying and recoat times change with temperature, humidity, film thickness and airflow. Follow the current label. The data sheet advises against applying if rain is expected within 15 minutes. It lists a recoat cure of 24 hours and a final cure of 48 hours under its NSF protocol at 100°F. Canadian data sheet. Follow the product label for your conditions.

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