Paint over Thompson's One Coat Water Seal

[paulandfrodo]

Hi,

I've got two buildings that are rendered and then have been sprayed with a coat of 'Thompson's One Coat Water Seal'. I want to put a colour ontop. Any suggestions of issues I might face or best products to use ?

It was last sprayed over two years ago. The spray was only on the 'weathered side' of the building that also get's baked with sun - as such, I am sure it's effectiveness has reduced somewhat.

Many Thanks.

 

[lostinthelight]

https://www.thompsonsweatherproofing.co.uk/faqs/

 

[Johnny Allround]

Hi, don’t worry its a seal against the elements. Go ahead and repaint your property you will only enhance the finish on your wall. There are numerous quality products out there the one I prefer is Dulux weathershield . Hope this helps.

 

[paulandfrodo]

Thanks lostinthelight, I have emailed the manufacturers about this after reading the FAQ's. What they say to cover their arses might not actually mean it cannot be done. There are a few products on the market that allow you to go over substrates that could be an issue - from a little research I see this question has been asked before and it was suggested - 'Owatrol E-B' but alas, no reply as to it working or not.

I have a friend who's the manager of the local Johnstons Pro Decorator Centre and she is very knowledgeable. I will WhatsApp her also, I will feed back what she suggests as she would prob. research it...

 

[JohnD]

'Thompson's One Coat Water Seal'

you don't mean the one that's a clear Silicone solution do you?

I can't see paint sticking to a waxy coating.

 

[paulandfrodo]

This is the product. The customer had the tin still. Alas, not the rear of it !

 

[lostinthelight]

can't see paint sticking to a waxy coating.

i would have thought If it did stick it wouldn't be saying much about the water repellant properties of the products

 

[paulandfrodo]

I know plasterers use Blue or Red 'Grit' which will go over ANYTHING !!! But hell, it's messy stuff.... About £45 for 10l, so not a bad price, but as it's name, you would not want to splash it anywhere, really could do with a white coloured base coat !

 

[JohnD]

This is the product. The customer had the tin still. Alas, not the rear of it !

yes, that's the silicone solution.

 

[paulandfrodo]

I've also contacted Sika about their product - "507 Rendagrip Extra Grip Bonding Agent, Red 10L". To see if they have anything that might actually be white coloured - as opposed to the Red or Blue... which will make a hell of a mess....