Sika

Sikalastic-658

Polyurethane deck coating · US · manufacturer-sourced

Check your container: This countdown is for the Polyurethane deck coating variant. Similar-looking versions may have different times.

How long before you can recoat Sikalastic-658?

Short answer

Ready for another coat: 4 hours after application.
Light foot traffic: 8 hours after application.
Roof coatings and roofing sealants

Weather-window plan

Rain-ready comes long before fully cured

  1. Apply the Polyurethane deck coating to a dry, clean roof surface
  2. Keep rain off for the stated period
  3. Allow foot traffic only at the stated time

This product’s stated stages Quoted at 70°F

  • Rain-ready3 hours
  • Ready for another coat4 hours
  • Light foot traffic8 hours
  • Heavy traffic1 day to 36 hours
  • Full cure2–3 weeks

Worth noticing: You can recoat at 4 hours, but the film is not fully cured until 2–3 weeks.

Common mistake: Starting a coat when the afternoon forecast turns wet.

Roof coatings and roofing sealants

Coat timeline

Plan the next coat and final use separately

  1. 1
    ApplyUse the Polyurethane deck coating directions and prepare for balcony decks and waterproof coating.
  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 around the weather

When did you apply the coating?
Conditions that affect drying
Where?
Thickness

Stated times

  • Ready for another coat4 hours
  • Light foot traffic8 hours
  • Heavy traffic1 day to 36 hours
  • Rain-safe3 hours
  • Full cure14–21 days

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

Manufacturer website: usa.sika.com

Conditions & fine print
  • Stated conditions: 70°F (21°C)
  • Times depend on temperature, humidity, film or bead thickness and airflow. Follow the current data sheet and label.
  • Apply at 60°F or above
  • Region US. Formulas can differ between countries; check your container.
  • Ready for another coat: At 70°F and 50% humidity.
  • Light foot traffic: At 70°F and 50% humidity.
  • Heavy traffic: At 70°F and 50% humidity.
  • Rain-safe: Relative humidity below 70% and the surface at 60°F or above.
  • Full cure: Cleaning waits for the same period.
  • 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 Report outdated information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
Sika Sikalastic-658
Variant
Polyurethane deck coating
Region
US
Listed use
balcony decks, waterproof coating
Timed stages recorded
recoat min, light foot, heavy traffic, rain ready, full cure
Source checked
2026-10-25

Documentation: Technical data sheet · Product data sheet v02.02, Aug 2025

Condition attached to the stated time: At 70°F and 50% humidity.

About this product

A polyurethane deck coating (formerly MSeal 658). Recoats in 4 hours and shrugs off rain after 3, but takes 2 to 3 weeks to cure and wash.

Using this specific product

Sika Sikalastic-658 is listed here as the Polyurethane deck coating version for balcony decks and waterproof coating. For coating or sealing a roof, 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 Polyurethane deck coating; related versions can use different timing.
  • For balcony decks and waterproof coating, pay particular attention to roof temperature, dew, rain in the forecast, film thickness and how many coats are needed.
  • At 70°F and 50% humidity. Relative humidity below 70% and the surface at 60°F or above. Cleaning waits for the same period.

How to check readiness

Check that the surface is dry and that no rain or dew is forecast inside the stated window. Before recoating, confirm the first coat matches the manufacturer’s stated condition; if the maximum window passed, check whether sanding is required. Try a protected edge first and avoid turning, dragging or concentrated loads. Open the area gradually and keep heavy or hot tires off until the full stated milestone.

Avoid this mistake

Rain resistance and walkable are earlier milestones than the full cure the roof system is rated for.

Compare with similar products

Keep going

Questions

How long before you can recoat this product?

Sika states: The sheet gives 4 hours between coats. Conditions: At 70°F and 50% humidity.. The sheet gives light foot traffic at 8 hours. Conditions: At 70°F and 50% humidity.. The sheet gives heavy pedestrian traffic at 24 to 36 hours. Conditions: At 70°F and 50% humidity.. The sheet says to protect the surface from rain for at least 3 hours. Conditions: Relative humidity below 70% and the surface at 60°F or above.. The sheet gives a total cure of 2 to 3 weeks. Conditions: Cleaning waits for the same period.. These are the manufacturer’s stated times, not a guarantee.

How long must Sikalastic-658 stay dry of rain?

The sheet gives at least 3 hours.

How long does this product take to fully cure?

Sika states: The sheet gives a total cure of 2 to 3 weeks. Conditions: Cleaning waits for the same period.. These are the manufacturer’s stated times, not a guarantee.

How long before I can walk on tile set with this product?

Sika states: The sheet gives light foot traffic at 8 hours. Conditions: At 70°F and 50% humidity.. These are the manufacturer’s stated times, not a guarantee.

How long before heavy traffic is safe on this product?

Sika states: The sheet gives heavy pedestrian traffic at 24 to 36 hours. Conditions: At 70°F and 50% humidity.. These are the manufacturer’s stated times, not a guarantee.

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

Times depend on temperature, humidity, film or bead thickness and airflow. Follow the current data sheet and label. Follow the product label for your conditions.

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