What sealant for plywood or MDF coasters?

[Sakshi]

Hi, I've painted these MDF coasters using Resene and other acrylic paints. These will be used for hot cups or hot pots. Please advise a sealer for the craft work to make it heatproof. I have used resin in the past but it goes yellow after a while. Is there any other product or varnish that can be used ?

 

[JacobZ]

Hi @Sakshi,

Thank you for your question and welcome to the Bunnings Workshop community, it is fantastic to have you with us.

I have to say those coasters look wonderful and I can understand why you would want to protect them as best you can.

Unfortunately, I am not aware of a clear coat that is designed specifically to resist high temperatures. 

A clear coat such as White Knight 310g Clear Gloss Squirts Spray Paint can typically resist maximum temperatures of around 80°C, however, anything higher than this would likely require a specialised product.

You could also try this Bondall Gloss Monocel Clear Timber Varnish, but I'm unsure of how it would perform under intense heat.

Allow me to tag @Noyade, @Jewelleryrescue and @Dave-1 to see if they have any ideas.

Let me know if you have any further questions.

Jacob

[Dave-1]

Afternoon @Sakshi 

Nice work and yeah I would be trying to protect them as well.

Sad to say I really dont have an idea on what could be used to give them that long term heat proof protection 😕

Dave

[Sakshi]

Thank you, Jacob. I would try the first option that you recommended.