Polymer Coating / Sealant
Quick answer: A polymer coating or sealant is a synthetic paint protectant that forms a thin, durable film for gloss and water behaviour. It lasts longer than wax and is easier to apply than pro ceramics, but usually offers less durability and chemical resistance than a true ceramic coating.
What it means
Polymer sealants use synthetic resins and cross-linking additives to bond to the clear coat after solvents flash. They create a clear, slick layer that boosts gloss and hydrophobics. Much like a traditional wax, many are wipe-on, wipe-off products suited to DIY or dealer packages, with durability measured in months rather than years. At New Again, we refer to these products as "synthetic waxes" and reserve the name "Polymer Sealants" for semi-permanent professional products.
Professional polymer sealants such as Suapgard and Toughguard are guaranteed to last 3-5 years, but may last much longer if properly cared for.
Diamondbrite is another company that many in the UK are familiar with. For many years they provided professional polymer coatings but have now switched to ceramic coatings.
Why it matters
- Ease of use: simpler application than pro ceramics, with forgiving wipe-off and shorter cure demands.
- Value: good protection and shine for customers who prefer maintenance every few months.
- Compatibility: often used as a topper over polished paint, and refreshed with quick detailers or spray sealants.
- Limits: typically lower chemical and abrasion resistance than ceramic coatings or PPF.
Where you’ll see it
Dealer paint protection packages, consumer-grade sealants, and maintenance toppers used between deeper details or before seasonal changes.
Context
Car Paint Protection; Sealants
Common mistakes
- Assuming polymer sealants match ceramic durability - most need reapplication within months.
- Applying over polishing oils without a panel wipe, which reduces bonding and lifespan.
- Judging protection only by beading - hydrophobics can fade before the film is fully gone.
- Using harsh TFRs or strong APCs routinely, stripping the film prematurely.
- Laying product too thick in hopes of “more protection” - it can smear and cure unevenly.
Written by Danny Argent. Last updated 07/11/2025 17:27