Anti foul temperature

[tidclacy]

Can I apply anti foul in cold conditions?

My anti foul says the substrate should be minimum 3 Degrees above the dew point of the air. If the dew point is 2 degrees what air temperature do I need before I can apply the paint 5 degrees? This is for Jotun Sea Queen.

Has anybody applied anti foul in cold conditions without problems?

 

[JimC]

Has anybody applied anti foul in cold conditions without problems?

Yes, it always seems to be bitterly cold up here at antifouling time. I stand the can in a large bucket of hot water before & during the operation which keeps the paint liquid & workable. The fact that the surface to which it is being applied is very much colder doesn't seem to cause any problems.

 

[Caer Urfa]

Can I apply anti foul in cold conditions?

My anti foul says the substrate should be minimum 3 Degrees above the dew point of the air. If the dew point is 2 degrees what air temperature do I need before I can apply the paint 5 degrees? This is for Jotun Sea Queen.

Has anybody applied anti foul in cold conditions without problems?

I would check with SML paints, we spoke to them about Jotun Vinyguard 88 primer and they confirmed it is 'very' susceptible to any damp spots on the hull which could cause paint bubbles, http://www.smlmarinepaints.co.uk/files/library/files/DATA_SHEETS/SeaQueen_data.pdf

what you have to remember is the 'night tempreture', I am also currently waiting to apply a second coat of Seaqueen but waiting for the tempreture to rise to 8C min day, 5 deg min night, it's tempting to get finished, but the thought of having to sand it off again is a no brainer!!.

Mike

 

[dulcibella]

No problem in cold, dry conditions. The tip about warming it first is good but, if this isn't possible, thin it slightly with #3 thinners.

 

[VicS]

Can I apply anti foul in cold conditions?

My anti foul says the substrate should be minimum 3 Degrees above the dew point of the air. If the dew point is 2 degrees what air temperature do I need before I can apply the paint 5 degrees? This is for Jotun Sea Queen.

Has anybody applied anti foul in cold conditions without problems?

The requirement for the surface temperature to be a few degrees above the dewpoint is to avoid the possibility of condensation on the surface while working .

While warming, or even thinning the paint, may aid application in cold conditions it should not been seen as a way of circumventing this requirement.

How you measure the dewpoint is another matter !

If you have a hygrometer calibrated in % relative humidity then if ambient temperature is around 5°C avoid apply the antifouling if the RH is 85% or higher

RH vs dewpoint calculator at http://www.dpcalc.org/

 

[AIDY]

No problem in cold, dry conditions. The tip about warming it first is good but, if this isn't possible, thin it slightly with #3 thinners.

agree..it make the paint go further too

 

[ffiill]

Its often the case that cold sunny days are often very low in humidity so great drying days particularly if you are in a slight wind.

 

[Lucky Duck]

agree..it make the paint go further too

But you will need more off it to achieve the same effectiveness, or have I missed something?

 

[JimC]

But you will need more off it to achieve the same effectiveness, or have I missed something?

I suppose you would in theory, though myself I take the view that if it's covered it's covered. You don't want a thick treacly coat anyway, which is what you get if you put in on too cold and it's too thick to roll out.

 

[chrishelen]

Sorry to hijack the thread but yesterday i had to remove a small area of anti foul about 1 sq foot i suppose the rest is good,i dont want to buy a tin of anti foul primer...can i use ordinary primer, or red oxide and then anti foul over it?

 

[alahol2]

Depends what you call 'normal' primer. Primocon would be fine, red oxide should be OK too.

 

[AIDY]

primocon is designed to be a waterproof barrier....... not sure red oxide is correct