Estimate how much paint you need for your room.


Estimated paint volume by room
Per Bedroom
Living & Open areas
Per Bedroom
Living & Open areas
Per Bedroom
Living & Open areas
Per Bedroom
Living & Open areas
~60 litres

Preparation of Paint - How much water?

gush cair interior paint has been formulated such that it is at the perfect consistency for immediate application straight from the tin. Should there be a need to thin our paint, only clean water should be used to prevent contamination of the paint, shortening its lifespan.


As a rule of thumb, water added to paint should never exceed 20% of the overall paint solution as this would severely reduce our paints efficacy. Nonetheless, diluting our paint in general is highly unadvisable.  

What is the difference between sealers and primers?

In essence, both sealers and primers are adhesive agents used in different scenarios. Sealers are applied onto concrete surfaces. Conversely, primers are typically applied onto metal and wooden surfaces.

What other surfaces can gush interior paint be applied to?

While application on wooden surface is possible, we would highly recommend against it. Such application would require the presence of an initial primer layer and may affect the efficacy of our paint. Additionally, as a water-based, latex paint, gush cair interior paint is only able to produce a matte finish. 

The cair range of interior paints can also be applied to certain inert plastics (although such is not recommended). 

gush cair / cair fresh interior paint should not be applied to metal surfaces as it is a water-based, latex paint which may lead to rusting of metals.  

gush cair / cair fresh interior paint should also never be used as a replacement for exterior paint as our paint formulation is specifically concocted for interior home settings.  

Is there a need for primer when using the cair range of interior paint?

There is no need for a separate primer before the application of gush interior cair paint given the adhesives included in our paint formula. However, if you should choose to, initial application of primer can help in the following circumstances: 

  • If there are previously issues with the wall (hard-to-cover marks due to stains or grease & defects that have been patched) 
  • If you are changing from a light to dark colour or a dark to light colour.  
  • If this is the very first paint layer applied to fresh drywall 
  • If it has been 8 years since last painting 
  • If the wall previously painted with an oil-based, emulsion paint (gush interior cair paint is a water-based, latex paint) 

Additionally, primer need not be applied if sealer has already been applied since sealers possess similar adhesive properties to primers.  

Why do I have to apply sealer before painting?

Sealer helps neutralise the alkali on the wall, which can cause peeling, staining or cracking of paint surfaces. It also helps remove excess moisture trapped within the walls, preventing mould and efflorescence growth. Additionally, sealer allows paint to adhere better to walls.  

Can we mix paint?

Mixing gush cair / cair fresh interior paint with other water-based, latex paints is highly unadvisable. The chemical formulation of our cair range of interior paint significantly differs from ordinary paints due to our proprietary additives that make our paint unique. Mixing paints will alter our paint formula and hence alter the appearance of the paint when applied to surfaces as well as the efficacy of our paint. 

As such, it is also highly advisable, when painting, to use separate brushes for different paints, to prevent cross-contamination. 

How long has cair interior paint been in the market?

gush interior paint has been sold publicly since 2017. The product was only referred to as ‘gush cair interior paint’ since 2019.

How much paint do I need for a 4-room HDB flat?

The paint coverage is 5-6 m² / litre for 2 coats.


A standard 4-room HDB of around 90m² would therefore require about 45-50 litres of paint based on 2 coats of paint. Kindly note that the estimated quantity may differ for your home based on how many walls you would need to paint.

Is there a special application method to use cair interior paint?

cair interior paint can be applied normally just like every other paint in the market. We recommend applying 2 coats of paint layer to fully enjoy the benefits of our paint.

Can I apply cair over my existing paint?

You can paint over existing paint from another brand and still enjoy the benefits of cair / cair fresh interior paint. However, depending on the severity, if there are moulding issues existing on your walls, we would highly recommend preparing the wall surface by first removing the mould and then applying sealer over the walls before you paint with cair.

What if my wall has existing moulding issues?

If your mould problems are severe, we would recommend to remove the mould first using a professional cleaning service, which we do provide together with our paint services. Afterwards you should apply a layer of sealer before the application of cair interior paint to prevent future mould growth.


Kindly note that the results of your painting may vary.

How long do the benefits of cair last?

cair / cair fresh interior paint’s ability to purify your air and living spaces have been found to last for 5-8 years.

We are also confident in the paint’s ability to prevent moulding on your walls, and offer a two-year guarantee if you engage our painting services. Our anti-bacterial capabilities should not deteriorate under normal usage.

Is my product covered under a warranty?

If you are the original purchaser of the paint, your cair interior paint will be covered by a limited lifetime warranty in which cracking, chipping, blistering or peeling from the paint, on properly prepared surfaces, are covered, subject to terms and conditions.

If you engaged our gush painting services, we offer an anti-moulding warranty that covers against mould growth on your walls, for 2 years from the invoice date.

Can stains be cleaned and how?

Unless badly stained, water should be sufficient in cleaning stains on walls. We do not recommend the use of detergent or hard scrubbing on walls.

cair fresh’s fuss-free freshness allows for easy stain removal.

How to clean walls painted with gush paint?

As gush cair / cair fresh interior paint is a water-based, latex paint overly harsh or abrasive cleaning methods will may cause the decolourisation of paint.  Additionally, refrain from using alcohol-based solvents during cleaning.  

Items Needed: 

  • Duster;
  • 3 Rags or sponges (2 damp, 1 dry) ;
  • 2 buckets (1 filled with clean water, 1 filled with non-alcohol cleaning solution and clean water) 

The following is our recommended for general cleaning of your walls: 

  • Using a duster, dust from the top of the walls to the bottom.  
  • Using a damp cloth with cleaning solution, gently clean a portion of the wall surface.  
  • Using a separate damp cloth with just water, rinse the cleaning solution off the painted wall surface 
  • Using a separate dry cloth, gently dab to dry this wet portion 
  • Continue to clean the remaining wall surface in this fashion.  

For parts of the wall with heavy staining, attempt to clean using the above method first. Should the stain remain, do not attempt to scrub the wall as this would damage the paint and wall surface. Instead, cover the stain with a fresh coat of paint. 

When is the next time we need to paint?

Through rigorous accelerated weathering testing, we have determined that gush cair interior paint’s air-purifying features have been found to last between 5 to 8 years.

Past this timeframe, the paint’s effects might start to deteriorate, but the paint will still function like ordinary water-based, latex paint and should last an additional 2 to 5 years.

Nonetheless, these figures are heavily dependent on the climate and we recommend repainting your house every 3 to 5 years.

How durable is the paint?

Your cair interior paint is covered by a limited lifetime warranty in which cracking, chipping, blistering or peeling from the paint, on properly prepared surfaces, are covered, subject to terms and conditions.

The paint has also been tested, according to the industry level SS 150: 2015 specifications, with the Wet Scrub Resistance test, in which a wear and tear simulation was used to assess the durability of the product. The lower the loss in thickness of the paint coating during the test, the greater the durability. The passing mark was 20 microns mean loss in thickness at the end of the test, the sample of cair interior paint had a mean loss in thickness of 5.4 microns.

Storage of Paint

  • Paint should be kept away from extreme conditions and stored in a cool, dry and well-ventilated place.  
  • When opening the paint can, use a proper can opener to prevent lid from denting or warping. An intact lid allows for an air-tight seal. You can also lightly tap all sides of the lid down to the can with a hammer (without warping it) or placing a layer of plastic wrap over the can before placing the lid. However, these steps are not necessary.  
  • Store paint container in an upright position. 
  • Remove any dust and dirt on tin surface before opening it. Such particles may fall into the paint and ruin it.  


Optional: You can pour small quantities of leftover paint into smaller containers to decrease the paint-to-air in the container, keeping the paint fresh for a longer time.  

Expiration of Paint

You can presume the paint has gone bad if it smells like anything other than what paint should smell like, and appears rough and chunky upon application, even after stirring. In serious instances, mildew and mould could even appear on the paint if it had not been sealed properly. In these case, proper disposal of paint is required. 


Unopened tins of gush cair / cair fresh interior paint have an average shelf-life of 18 months.  

Disposal of Paint

gush cair interior paint (or any paint for that matter) should not be disposed in liquid form. Do not: 

  • Pour it into sinks, drains or soil 
  • Leave paint cans for regular trash pick-up 
  • Burn paint 

All paints should be hardened or dried by disposal. You can use shredded cardboard or newspaper (or any other absorptive materials) to help absorb paint and speed up the solidification process.  

Why do paints expire?

The solvents present in all paints serve as a medium for bacteria growth over time. This results in the curdling of paint, production of rancid odours and even the growth of mildew and mould. Any contamination during the process of preparing the paint, such as using “unclean water” during mixing, further expedites the growth of bacteria and hence shortens the lifespan of paint.  

Additionally, given that our paint formula is infused with a highly-absorbent plant-based material, our paint might thicken with time, affecting the efficacy of our paint.  

However, this phenomenon stops once we apply the paint to surfaces. These solvents evaporate as the paint dries and are cleared away by moving air. This leaves behind solid paint particles that adhere to wall surfaces, giving them colour.  


While the cair range of interior paints possesses significantly greater anti-microbial properties compared to ordinary paints, such mechanisms are primarily activated when the paint is applied to walls. 

Will the paint fade under exposure to normal sunlight into the room?

The paint might fade to normal sunlight. all paints under UV will be subject to some form of slow discolouration

How much does your paint cost?

Please visit to find out the price of our paint tins. You may get a quotation for our painting services by sending an enquiry on our website.

Do you provide delivery?

Yes, we do provide free delivery for up to 5 paint tins.

Can you do a site quotation during weekends or in the evenings?

We will do our best to accommodate to your schedule for site visits and quotation, but this is also subject to the availability of our sales staff.

From 10 to 24 October, add a DIY Kit to your cart and use code “howweroll” to redeem a FREE DIY Kit for all paint orders above $70!