• GRP Topcoat White
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Topcoat White

Topcoat White

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A high quality, isophthalic, Lloyds Approved Topcoat. Unlike standard gelcoat, Topcoat cures tack free, which allows it to be used like a paint and seal fibreglass surfaces. This Topcoat has excellent properties which include water resistance and UV light stability. This high quality Topcoat is suitable for a wide range of applications and for all GRP surfaces. Pre-pigmented White. Not suitable for spray application. Catalyst is supplied Free with all Topcoats and Resins 

 

  • High quality, marine grade polyester topcoat
  •  Excellent weather & UV resistance
  •  Lloyd's approved for boat building & repairs
  •  Tough, durable finish
  • Free Catalyst 

 

LIQUID RESIN PROPERTIES

 

( Typical values )

 

Reactivity at 25°C , 1.8% MEKP (Low activity)

 

Gel time: 8 – 11 minutes

   

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!
   

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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