Alchemie

Release Agent R4

PVA release film for GRP molds · GB · manufacturer-sourced

Check your container: This countdown is for the PVA release film for GRP molds variant. Similar-looking versions may have different times.

How long does Alchemie Release Agent R4 take to dry?

Short answer

Fully dry: 1 hour after application.
Mold release agents

Release-and-cast plan

Let the release dry before the pour

  1. Apply the PVA release film for GRP molds in thin coats
  2. Let it flash or dry as stated
  3. Pour or mold after the stated wait

This product’s stated stages Quoted at 77°F

  • Fully dry1 hour

Worth noticing: The manufacturer states only one timing here (fully dry, 1 hour); nothing else is inferred.

Common mistake: Pouring onto a release film that is still wet; surface defects result.

Mold release agents

Project stage ladder

Demolding, handling, finishing and final use may occur at different times

ShapeSetFinishUse

For GRP molds and gelcoat, identify which stage the stated dry 1 hour milestone actually unlocks. Earlier handling does not prove final cure.

Time the release

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

Stated times

  • Fully dry1 hour

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

Manufacturer website: alchemie.com

Conditions & fine print
  • Stated conditions: 77°F (25°C)
  • Times depend on temperature, humidity, film or bead thickness and airflow. Follow the current data sheet and label.
  • Region GB. Formulas can differ between countries; check your container.
  • Fully dry: At 25°C. Cold, damp conditions slow it.
  • 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 Report outdated information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
Alchemie Release Agent R4
Variant
PVA release film for GRP molds
Region
GB
Listed use
GRP molds, gelcoat
Timed stages recorded
full dry
Source checked
2026-10-25

Documentation: Technical data sheet · Data sheet issue 1, 27/08/06

Condition attached to the stated time: At 25°C. Cold, damp conditions slow it.

About this product

A PVA release film that must dry completely before gelcoat goes on. The sheet warns against a warm air fan, which can skin the film over and trap wet solution under it.

Using this specific product

Alchemie Release Agent R4 is listed here as the PVA release film for GRP molds version for GRP molds and gelcoat. For conditioning a mold, 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 PVA release film for GRP molds; related versions can use different timing.
  • For GRP molds and gelcoat, pay particular attention to mold material, coat count, cure between coats and mold temperature.
  • At 25°C. Cold, damp conditions slow it.

How to check readiness

Follow the coat-by-coat schedule and the cure time before molding. The sheet gives a drying time of approximately one hour.

Avoid this mistake

A new or repaired mold may need a long conditioning period before production.

Compare with similar products

Keep going

Questions

How long does this product take to dry?

Alchemie states: The sheet gives a drying time of approximately one hour. Conditions: At 25°C. Cold, damp conditions slow it.. These are the manufacturer’s stated times, not a guarantee.

Can I speed up R4 with a fan?

The sheet says not to use warm air, because the surface can skin and trap moist solution beneath. In adverse conditions it says to pre-warm the mould.

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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