Is there a waterproof paint for shower?

When it comes to shower walls, moisture and humidity are the enemies. Over time, water can seep into porous shower materials like drywall or tile grout, allowing mold and mildew to take hold. This not only looks unsightly, but can create health hazards as well. Applying a waterproof coating to shower walls is an effective solution to prevent water damage. But does a truly waterproof paint for showers exist? Let’s take a closer look at some of the options.

What is waterproof paint?

Waterproof paint contains resins and binders that create a protective membrane or barrier on the surface it is applied to. This barrier prevents liquid water from being absorbed into the material underneath. Instead, water beads up and runs off the coated surface. While no paint is 100% impervious, quality waterproof paints are highly resistant to moisture ingress. This makes them ideal for use in bathrooms, basements, and other damp areas.

Some key characteristics of good waterproof paint include:

• Contains acrylic, epoxy, urethane, or elastomeric resins
• Forms a thick, rubbery coating on the surface
• Withstands ponding or standing water without allowing seepage
• Adheres well to multiple surfaces like concrete, wood, and drywall
• Resistant to mold, mildew, and algae growth
• Can bridge minor cracks

When evaluating waterproof paints, look for these protective qualities to ensure you get maximum water resistance.

What surfaces can you use waterproof paint on?

One of the benefits of waterproof paint is its versatility to coat and protect many different materials. Here are some common surfaces where waterproof paint can be applied:

Drywall

Drywall is very prone to water damage, swelling, and mold growth when exposed to moisture over time. Applying 2-3 coats of waterproof paint creates a barrier that helps prevent this deterioration. Be sure to prep drywall properly by cleaning, sanding, and priming first.

Concrete

Basements, foundations, and concrete steps are high-risk areas for moisture seepage. Waterproof concrete paints seal the porous surface to prevent water absorption. Tuckpointing cracked or crumbling areas first provides the best results.

Wood

Untreated wood readily soaks up water like a sponge. Coating wood with waterproof paint protects it from warping, rotting, and decay. New pressure-treated lumber may still need additional waterproofing.

Plaster

Like drywall, plaster walls and ceilings are prone to water damage over time. Apply waterproof paint as an affordable solution to protect decorative plasterwork in bathrooms and kitchens.

Tile

While tile won’t absorb water, coating tile walls and floors with waterproof paint seals the grout lines. This prevents moisture from seeping behind tiles and causing unseen damage.

Fiberglass

For fiberglass shower surrounds, a waterproof paint formulated for slick surfaces will help prevent staining and mildew. Scuff the surface lightly before painting for better adhesion.

Metal

Certain waterproof paints are safe for application on metal surfaces like galvanized steel, tin, copper, and aluminum. This prevents corrosion and rust damage.

Always check the manufacturer’s recommendations to ensure compatibility with the surface you plan to paint. Proper prep work like cleaning, sanding, and priming is also vital for good results.

What are the best waterproof paints for a shower?

When selecting a waterproof paint for your shower walls and base, there are a few important factors to consider:

Ease of Application

Choose a paint that goes on easily with a brush, roller, or sprayer and self-levels well. Thin consistency paints formulated for bathrooms are best for DIY application.

Fast Drying

Since showers are humid environments, you want a paint that dries rapidly so you can apply multiple coats in a day. Look for 1-2 hour dry times between coats.

Mold Resistance

Mold and mildew growth are major shower problems, so pick a paint with EPA-registered antimicrobial additives to inhibit their growth.

Scrubbable Finish

A durable, scrubbable satin or gloss finish allows you to easily wipe away soap scum and dirt without damaging the paint.

Crack Bridging Ability

Flexible paints with elastomeric resins can bridge over existing hairline cracks and prevent new ones from forming.

Here are 5 top-rated waterproof paint picks ideal for showers:

KILZ Interior/Exterior Enamel Porch and Patio Latex Floor Paint

• High-gloss acrylic/urethane formula
• Creates a waterproof, mildew-resistant film
• Withstands foot traffic and cleaning chemicals
• Applies easily with roller or sprayer
• Fast 1-hour recoat time

Rust-Oleum Zinsser Perma-White Mold & Mildew Proof Interior Paint

• Contains EPA registered biocide to inhibit mold growth
• Acrylic-based with high hiding power
• Low odor and VOC
• Soap and scrub resistant
• Can be tinted to any color

Liquid Rubber Waterproof Sealant and Concrete Paint

• 100% elastomeric acrylic
• Stretches up to 600% to bridge cracks
• Withstands ponding water
• Textured matte finish
• Indoor/outdoor use

INSL-X Sure Step Acrylic Anti-Slip Coating

• Provides grip texture with resin particles
• Good hide over dark shower pans
• Acrylic-enamel waterproofing
• Excellent adhesion and durability
• Relatively low odor

valspar Wet Look High Gloss Enamel

• Ultra-reflective gloss finish
• Repels water, stains, and scuffs
• Provides a wet-look accent effect
• Compatible with tile, fiberglass, and metal
• Applies smoothly by roller

Be sure to follow all preparation, priming, dry times, and application instructions provided on the product labeling.

How to Prep and Paint a Shower for Waterproofing

Achieving the best results from waterproof shower paint requires proper prep work and application technique:

Clean

Remove any existing mildew stains with bleach cleaner. Degrease walls with TSP substitute and rinse well. Removing glossy silicone caulk and scraping off loose paint preps for best adhesion.

Sand

For glossy fiberglass or metal shower surfaces, scuff sanding with 120-150 grit sandpaper improves paint grab.

Patch and Repair

Fill any holes, cracks, or gaps with waterproof patching compound. Allow repairs to fully cure before painting.

Prime

Priming provides a uniform surface for paint to stick to. Use the type of primer recommended for each shower material. Allow primer to dry completely.

Paint Carefully

Cutting in the edges with a brush and rolling the center coats works best. Apply 2-3 coats allowing proper dry time between coats.

Let Cure

Allow paint to cure fully for several days before direct water contact. Curing ensures you get the paint’s full moisture protection.

Maintain

Gently scrub walls with bathroom cleaner and soft cloth as needed. Avoid abrasive cleaners that could damage the paint.

Pros and Cons of Waterproof Shower Paint

Waterproof paint for bathrooms provides benefits but also has some limitations to consider:

Pros

• Prevents water damage, leaks, and mold growth
• Affordable compared to regrouting or retiling
• Easy for DIY application in a day
• Produces a water-beading surface
• Refreshing old tile and fiberglass surrounds

Cons

• Not a substitute for properly installed tile or vapor barrier
• Not designed for direct contact with hot water
• Requires thorough surface prep
• Needs occasional touch ups over time
• Glossier paints can feel slippery

Overall, waterproof bathroom paint provides a budget-friendly protective coating that extends the life of shower surfaces. Proper preparation and product selection are key to getting optimal results.

FAQs

Here are answers to some frequently asked questions about waterproof shower paint:

Is all bathroom paint waterproof?

No, you need to select a paint designed specifically for wet areas like bathrooms and showers. Look for labels indicating it is a waterproofing paint.

How long does waterproof shower paint last?

With proper prep and application, expect around 3-5 years of waterproofing protection before needing touch ups. Higher quality epoxy or urethane paints may last 5-7 years.

Can you use regular latex paint in a shower?

We do not recommend using typical wall paints lacking waterproofing resins in the shower. The humidity will eventually cause the paint to fail prematurely.

Does waterproof paint require a primer?

Most waterproof paints will still require a primer coat on bare drywall, concrete, wood, and other porous surfaces. The primer seals the surface so the paint bonds tightly.

Can I apply waterproof paint over silicone caulk?

Paint adhesion over silicone caulk is poor, so it’s best to remove old caulk entirely before painting. New silicone caulk can be reapplied over cured waterproof paint.

Conclusion

Upgrading your outdated shower walls with waterproof paint is an easy DIY project that prevents costly water damage and mold growth. When applied to clean surfaces with proper prep and technique, waterproofing paints form a moisture barrier that maintains the beauty of your bathroom. Be sure to select bathroom paints designed specifically to repel water and resist mildew. Follow the manufacturer’s recommendations for best long term results. With a quality waterproof paint and a Saturday afternoon, you can give your shower an affordable facelift.