Could this be used indoors on wood where insulation would be covering it?

I would think YES. I have used it inside on open porch ceiling - it is really nice paint. As with any coating - and with insulated areas - air circulation is key to reducing moisture. It is the moisture that helps breed mold and mildew. Of course be sure to clean the area to be painted well first - if it has any existing issues. Two coats are recommended - but I found one coat is great - I may re-coat another time - but probably will wait years!

would this work well on te top rails of a doughboy pool?

I have found this works well on wood surfaces. Your pool top surface is probably a resin material. You might want to contact Rustoleum customer service directly and get their input. Of course proper prep is key too - any mold or mildew needed to be scrubbed off and surface dulled before applying two coats of Perma - White.

Is this really semi-gloss? Technical details say "flat."

Mine came semi gloss as in picture.

Will this work on a vehicle?

I don't know. Try asking the question on google. I used it on an old shed in my back yard to prevent it from continuing to deteriorate.

Zinsser 3131 Perma-white Mold & Mildew-proof Exterior Paint, Semi-gloss, 1-gal

Product ID: 32130606

Secure Transaction

Details

Brand
Rust-Oleum
Color
White
Finish Type
Semi-Gloss
Size
126 Fl Oz of
Item Volume
3785.41
Special Feature
Low Odor

💧Waterproof exterior finish

⏱️Fast 2-hour dry time

🛡️Mold & mildew-proof

Description

🛠️ Protect, perfect, and paint with confidence!

LOW ODOR LUXURY - Enjoy a fresh, low-odor application experience without harsh fumes.
WEATHERPROOF WONDER - 100% waterproof formula stands strong against rain, snow, and humidity.
QUICK DRY EFFICIENCY - Fully cures in just 2 hours—get back to your day faster.
SHIELD YOUR SURFACES - Advanced mold & mildew resistance keeps exteriors pristine and healthy.
SLEEK SEMI GLOSS FINISH - Elevate curb appeal with a durable, elegant semi-gloss sheen that lasts.

Zinsser 3131 Perma-white is a premium 1-gallon semi-gloss exterior paint designed for metal and wood surfaces. Featuring mold and mildew-proof technology, waterproof durability, and a low-odor acrylic formula, it dries fully in 2 hours to deliver a long-lasting, pristine finish that withstands harsh outdoor conditions.

Specifications

Brand	Rust-Oleum
Color	White
Finish Type	Semi-Gloss
Size	126 Fl Oz (Pack of 1)
Item Volume	3785.41 Milliliters
Special Feature	Low Odor
Unit Count	128.0 Fluid Ounces
Paint Type	Acrylic, Spray
Specific Uses For Product	Exterior
Surface Recommendation	Metal,Wood
Indoor/Outdoor Usage	Outdoor
Item Form	Liquid
Is Waterproof	True
Package Information	Can
Color Code	#FFFFFF
Full Cure Time	2 Hours
Coverage	2 Coats
Water Resistance Level	Waterproof
UPC	047719031314
Global Trade Identification Number	00047719031314
Manufacturer	Zinsser
Dry Time In Hours	2
Part Number	3131
Item Weight	3.17 ounces
Product Dimensions	13.5 x 13.5 x 8 inches
Item model number	3131
Is Discontinued By Manufacturer	No
Finish	Semi-Gloss
Material	Liquid
Item Package Quantity	1
Special Features	Low Odor
Batteries Included?	No
Batteries Required?	No

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

$401

Duties & taxes incl.

New Zealandstore

Free Returns

30 daysfor PRO membership users

15 dayswithout membership