Sealant
Quick answer: A sealant is a synthetic, polymer-based last-step protectant that forms a thin, slick layer on paint to boost gloss and water behaviour for weeks to months. It is more durable than traditional wax but not as long-lived or chemical-resistant as a professional ceramic or PPF.
A semi-permanent coating which is made of acrylic or polymer, first introduced by Lacroe and made popular by brands such as Supagard and Diamondbrite. These types of coatings typically lasted 3-5 years, and much longer when maintained with aftercare products.
Within the industry, the word 'sealant' is used rather loosely, but typically, when it comes to retail products, it means a synthetic wax or product that contains synthetic waxes or polymers. However, these products don't tend to function much differently to natural waxes, so for our purposes, we define them as waxes, and reserve the word 'sealant' for semi-permanent coatings which last years rather than months.
What it means
Paint sealants use polymers or resins that spread and cure into a clear film on the clear coat. They are usually wipe on - haze - wipe off liquids or sprays, and many modern versions are SiO₂-enhanced. Sealants increase slickness, help water bead or sheet, and make washing and drying easier. Performance depends on preparation, application conditions and maintenance routine.
Why it matters
- Durability vs wax: commonly lasts longer than traditional waxes, with better detergent resistance.
- Ease of use: quick application with forgiving wipe-off - good for DIY and maintenance plans.
- Appearance: adds clarity and gloss with a crisp, bright look.
- Maintenance: pairs well with toppers to refresh behaviour between deeper services.
Where you’ll see it
Retail spray sealants and liquids, dealer “paint protection” packages, detailer maintenance services for cars without ceramics or in the lead-up to a coating.
Context
Car Paint Protection; Last Step Protection (LSP); Maintenance
Common mistakes
- Expecting ceramic-like longevity or abrasion resistance from a simple sealant.
- Applying over bonded contamination or oily residues - decon and a light panel wipe improve bonding.
- Using strong TFRs every wash - frequent heavy chemistry will mute behaviour and shorten life.
- Layering thick or too often - can smear or feel grabby without adding meaningful protection.
- Applying in hot sun or on hot panels - risks rapid flash, streaks and uneven cure.
Written by Danny Argent. Last updated 10/11/2025 14:41
Further Reading
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🍀 Effortless Car Care: The Benefits of Ceramic
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🍀 What are the drawbacks of a ceramic coating?
We asked Artificial Intelligence to tell us the downsides of a ceramic coating, then reviewed the result.
Services
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🔥🔥🔷 Ceramic Car Paint Protection
Restore deep gloss and long-lasting protection with professional ceramic coating for your car paintwork, shielding against swirl marks, UV fading, dirt and winter road salt. -
🔷 Exterior Car Detailing
Our exterior detail prepares your car's exterior, and is an essential step in the process if you are having paintwork restoration, polishing and ceramic sealants.