Assuming the previously painted surfaces are clean, dry, sound and prepared as detailed in the Technical Data sheet we can recommend Coo-Var Acrylic Floor Paint as a low odour alternative.

This can be applied over most previously applied coatings, but we would recommending testing for compatibility and adhesion prior to full application.

No, for application to concrete - power floated, granolithic and smooth surfaces should be roughened first to provide a good "key" for the paint.

This can be done mechanically by abrading or blasting, or chemically using Coo-Var Acid Etch.

These processes will have the advantage in addition to preparing the surface of also removing dirt and laitance. New concrete must be allowed to cure thoroughly which can take up to 3 months.

The paint will mirror the profile of the substrate as such will not hide imperfections.

This paint reaches full hardness in 5 - 7 days at 20°c.

'healthy and safe' is a broad statement and relatively vague as to what you require here but something like Coo-Var Acrylic Floor Paint would likely be a more suitable product to consider as this is water based and low odour.

No, assuming they are glazed tiles we would instead recommend Smartkote Protectakote Clear Primer Treatment followed by Smartkote Safekote.

Providing that the concrete being painted is structurally sound, and the concrete has been prepared and product applied following the proper procedure (see product data sheet) hot tyre syndrome should not be an issue. However, we do always recommend the use of Coo-Var Profloor 2 Pack Epoxy Floor Paint in place of Coo-Var Floor Paint where vehicle traffic is expected as this would offer a far more robust and durable solution.

Coo-Var Floor Paint can be used on exterior concrete however, Coo-Var do offer a specific product for driveways which would be preferred called Coo-Var Tennis Court & Drive Paint.

Coo-Var Floor Paint would be slippery when wet so we would instead recommend Coo-Var Suregrip Anti-Slip Floor Paint.

Coo-Var Floor Paint can be used internally and externally and assuming the patio is concrete, paving slabs or similar porous masonry substrate then this would be OK. Follow preparation guidelines on the product data sheet and apply the first coat of Coo-Var Floor Paint thinned 10% with Teamac/Coo-Var Thinner 14, then apply a second coat when dry, undiluted.

No, unfortunately this product will not adhere to slate.

We would instead recommend Coo-Var Radiator Enamel.

Coo-Var Floor Paint would be suitable for this assuming there is a damp proof membrane in the slab. See preparation and application details on the product page.

Coo-Var Floor Paint could be used for this, to bare concrete you can apply the first coat of Coo-Var Floor Paint thinned 10% with Teamac/Coo-Var Thinner 14, then apply a second coat when dry undiluted.

Yes, substrate and air temperature should be above 10°C.

All surfaces should be clean, dry, sound and free from contaminants.

Concrete - power floated, granolithic and smooth surfaces should be roughened first to provide a good "key" for the paint. This can be done mechanically by abrading or blasting, or chemically using Coo-Var Acid Etch. These processes will have the advantage in addition to preparing the surface of also removing dirt and laitance. New concrete must be allowed to cure thoroughly which can take up to 3 months.

To prime prepared, bare concrete use Coo-Var Floor Paint thinned 10% or Coo-Var Alkali Resisting Primer.

Suitable for indoor and outdoor use, Coo-Var Floor Paint is compatible over most previous coatings and gives an off gloss finish.

Any dust created wouldn't be toxic but we would always recommended wearing suitable PPE (Personal Protective Equipment) - i.e. face mask, gloves, goggles, etc. whilst carrying out preparation works.