Expert advice

Can topside paints be applied to below water surfaces?

Most topside coating systems if constantly immersed or kept wet will tend to blister. Provided the boat is only put into the water for a few days then a topside coating can be used below the waterline. Note that if you have a trailer boat with any carpet type material used as a padding against any top-side type coating then you may experience blistering in that area if the carpet remains wet for long periods. For trailer boats that are immersed for longer periods there is the question of - do I antifoul or not? A possible answer here is to use an epoxy primer such as Interprotect® below the waterline and not overcoat it

You can use our Paint Estimator to determine how much paint is required. Just enter the type and dimensions of your boat, the product you're using and the number of coats required, and you'll receive a helpful estimate.

How much paint do I need?

We'll help you calculate how much paint is needed.

What product do you want to paint

What type of boat?

Full bodied craft

Fin keeled racing craft

Medium draft racing craft

What is the underwater area?

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1 x LWL x (B+D) = Underwater Area (m2)

0.5 x LWL x (B+D) = Underwater Area (m2)

0.75 x LWL x (B+D) = Underwater Area (m2)

LOA = Length Overall
LWL = Length Waterline
B = Beam
D = Draft
F = Freeboard

What application method?

How many coats do you want to apply?

If you put less than the minimum recommended numbers of coats, it may affect the performance of the coating.

To paint a ? x ? x ? ??, with ? coats

You'll need ? litres of

Warning that this tool is an estimator only

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