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Topcoat White

Topcoat White

Regular price £22.40 GBP
Regular price Sale price £22.40 GBP
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Description Delivery & Returns Why Buy From Us REVIEWS FAQ

Topcoat White is a high-quality, isophthalic, Lloyd’s Approved polyester topcoat designed to seal and protect GRP fibreglass surfaces with a tough, durable and weather-resistant finish.

Unlike standard gelcoat, this Topcoat cures tack-free, allowing it to be applied like a paint while forming a hard, protective surface. It offers excellent water resistance and UV stability, making it suitable for both fibreglass roofing systems and marine applications, including boat building and repairs.

Pre-pigmented in White, this marine-grade topcoat delivers a clean, professional finish and is ideal for a wide range of GRP applications.

Not suitable for spray application.

Catalyst is supplied FREE with all Topcoats and Resins.

Key Features

  • High-quality, marine-grade polyester topcoat
  • Tack-free cure for easy application
  • Excellent weather & UV resistance
  • Lloyd’s approved for boat building & repairs
  • Tough, durable long-lasting finish
  • Suitable for all GRP fibreglass surfaces
  • Pre-pigmented White
  • Free catalyst included

Liquid Resin Properties (Typical Values)

  • Reactivity @ 25°C (1.8% MEKP – Low Activity)
  • Gel Time: 8–11 minutes
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Please allow 1 to 3 working days for your order to arrive.

Returns are easy, if the items are unopened and unused then simply contact us for a returns number and send your item to our returns centre for fast processing. We'll get you a replacement or refund in a snap!

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Please allow 1 to 3 working days for your order to arrive.

Returns are easy, if the items are unopened and unused then simply contact us for a returns number and send your item to our returns centre for fast processing. We'll get you a replacement or refund in a snap!

Here are 5 more great reasons to buy from us:

Returns are easy, if the items are�unopened and unused�then simply�contact us�for a returns number and send your item to our returns centre for fast processing. We'll get you a replacement or refund in a snap!

In the unlikely event that you find your item cheaper at another online store, just let us know and we'll beat the competitor's pricing hands-down.

We insist that you love everything you buy from us. If you're unhappy for any reason whatsoever, just let us know and we'll bend over backwards to make things right again.

Ordering from APEX Fibreglass Roofing Supplies is 100% safe and secureso you can rest easy. Your personal details are never shared, sold or rented to anyone either.

Here are 5 more great reasons to buy from us:

Returns are easy, if the items are�unopened and unused�then simply�contact us�for a returns number and send your item to our returns centre for fast processing. We'll get you a replacement or refund in a snap!

In the unlikely event that you find your item cheaper at another online store, just let us know and we'll beat the competitor's pricing hands-down.

We insist that you love everything you buy from us. If you're unhappy for any reason whatsoever, just let us know and we'll bend over backwards to make things right again.

Ordering from APEX Fibreglass Roofing Supplies is 100% safe and secureso you can rest easy. Your personal details are never shared, sold or rented to anyone either.

When mixed at 1.8% MEKP and applied at room temperature (25°C), Topcoat White will gel in 8–11 minutes. Full cure will depend on ambient conditions, but it's typically fully cured within 24 hours.

Yes. Topcoat White offers excellent resistance to water, UV rays, and weathering, making it a perfect choice for outdoor fibreglass surfaces that require long-term durability.

In most cases, one thorough coat is sufficient. However, if a thicker or smoother finish is desired, a second coat can be applied once the first has fully cured. Always lightly abrade between coats for optimal adhesion.

No. This version is pre-pigmented white and is not designed to be tinted. For custom colours, you would need to source a colour-matched version or contact the supplier directly.

Store the product in a cool, dry place away from direct sunlight, in its original sealed container. Keep catalyst separately and handle with care. Shelf life is typically 6–12 months under proper storage conditions.

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