For conservative exterior specifications
We consider PVDF where façade exposure, access difficulty, colour retention and a long-established architectural track record carry more weight than the lowest upfront price.
Architectural coating guide
Coating chemistry, selection and verification
What Are PVDF, FEVE and SDP Coatings on ACP Sheets?
ACP sheet coil coating is the controlled factory process used to clean, pretreat, prime, colour-coat and cure the aluminium coil before it becomes part of an aluminium composite panel. At Aludecor, we treat the finish as a complete paint system—not merely a colour.
PVDF means Polyvinylidene Fluoride, FEVE means Fluoroethylene Vinyl Ether, and SDP means Super Durable Polyester. PVDF and FEVE are premium fluoropolymer families commonly considered for demanding exterior work, while SDP can provide a strong cost-performance balance for moderate exterior exposure. Standard polyester is generally associated with interior use.
The right choice depends on resin chemistry, pretreatment, primer, pigment, topcoat, curing, aluminium substrate, colour, gloss, maintenance access and written warranty. We advise buyers to verify any coating claim—especially a premium coating claim on a very thin aluminium skin—against the product grade, technical data and traceable supply.
PVDFPremium fluoropolymer; conservative exterior specification.
FEVEPremium fluoropolymer; broader colour and gloss possibilities.
SDPSuper Durable Polyester for defined moderate exterior exposure.
PolyesterTypically selected for interior decorative applications.
Quick answer
Which coating should you consider?
We recommend starting with exposure and application, not with the coating name or shade card.
For premium performance with design freedom
We consider FEVE where a project needs premium exterior weatherability together with wider gloss, vivid colours or special-effect design possibilities.
For balanced exterior value
We consider SDP for moderate exposure, low- to mid-rise applications and budget-conscious exterior work—after checking grade, colour, location and warranty.
Our specification rule: a paint name does not prove coating quality. We read the resin system with the aluminium skin, alloy, pretreatment, primer, coat build, colour, gloss, panel grade, core and written warranty.
ACP sheet coil coating
What is ACP sheet coil coating?
ACP sheet coil coating is performed on a continuous aluminium strip before panel lamination. Compared with post-painting a finished part, the process allows controlled surface preparation, repeatable paint application, oven curing, rewinding and in-line inspection.
UncoilingThe mill-finish aluminium coil is opened and joined for continuous processing.
Cleaning and pretreatmentOil, oxide and contaminants are removed; the surface is prepared for adhesion.
Primer applicationA compatible primer creates the base for adhesion and substrate protection.
Topcoat applicationThe specified PVDF, FEVE, SDP or polyester colour coat is applied uniformly.
Curing and coolingThe coating is oven-cured under controlled production conditions and cooled.
Inspection and rewindingColour, gloss, DFT, adhesion and surface quality are checked before rewinding.
Why the process matters
- More consistent colour and gloss across the coil
- Controlled primer-to-topcoat adhesion
- Repeatable curing and film integrity
- Better traceability by production batch
- Formability retained when the system is correctly designed
- Quality checks before ACP lamination
What ACP sheet coil coating can influence
- Weathering and UV response
- Colour retention, chalking and gloss
- Cleanability and stain response
- Surface appearance and batch consistency
- Fabrication behaviour and scratch visibility
- Warranty scope and ACP sheet price
Paint-system layers
Layers in an ACP paint system
Not every colour or finish uses the same build. In ACP sheet coil coating, solid, metallic, high-gloss, wood and special-effect finishes may require different coat structures.
Read the finish with the product specification. A two-coat solid colour and a three-coat metallic effect can use different primers, topcoats or clear coats even when both are described under the same broad resin family.
08
Protective filmTemporary protection during transport, fabrication and installation.
07
Clear coat, where applicableMay be used for metallic, bright or special-effect finishes.
06
Colour coat or topcoatPVDF, FEVE, SDP or polyester as specified.
05
PrimerSupports adhesion and substrate protection.
04
Conversion layer, where specifiedPart of the pretreatment system.
03
Cleaned and pretreated aluminiumSurface condition affects coating integrity.
02
Aluminium substrateSkin thickness, alloy, temper and flatness are grade-specific.
01
Back or service coatApplied to the reverse side where the grade specifies it.
Three coating families
PVDF, FEVE and SDP explained
We use the full form and resin family as a starting point, then verify the actual primer, coat build, colour, aluminium skin and approved application.
Polyvinylidene Fluoride
PVDF coating is a fluoropolymer architectural finish associated with demanding exterior use. Its strong carbon-fluorine backbone supports resistance to UV-driven binder degradation, but actual performance still depends on resin quality, pigmentation, primer, curing, aluminium and production control.
- Established exterior-façade track record
- Strong colour and chalk-resistance potential
- Usually selected for conservative premium specifications
- Approved colours and gloss levels still matter
- Not every product labelled PVDF is equivalent
Fluoroethylene Vinyl Ether
FEVE is a crosslinkable fluoropolymer family. We consider FEVE resin coating where premium weatherability must be combined with broad colour freedom, gloss flexibility and special-effect design possibilities.
- Premium exterior coating family
- Wide colour and gloss possibilities
- Useful for expressive architectural finishes
- System design and warranty must be verified
- Not universally better than PVDF
Super Durable Polyester
SDP is an exterior-oriented polyester system engineered to perform above standard decorative polyester. In our framework, the SDP paint system can suit moderate exposure and value-led exterior applications when the selected grade, colour and warranty are appropriate.
- Balanced cost-performance position
- Suitable for defined exterior applications
- Below the premium fluoropolymer tier
- Exposure and maintenance access matter
- Do not confuse SDP with ordinary interior polyester
ACP coating comparison
PVDF vs. FEVE vs. SDP vs. Polyester (PE) Coating
This comparison is application-led. The final decision must be confirmed against the actual Aludecor product grade, approved colour, project location and written warranty.
| Particulars | PVDF | FEVE | SDP | Polyester (PE) |
|---|---|---|---|---|
| Full form | Polyvinylidene Fluoride | Fluoroethylene Vinyl Ether | Super Durable Polyester | Polyester (PE) |
| Resin family | Fluoropolymer | Crosslinkable fluoropolymer | High-performance polyester | Standard polyester |
| Typical positioning | Premium exterior | Premium exterior with design flexibility | Moderate exterior / value-led exterior | Interior / decorative / value-led |
| Exterior suitability | Consider for demanding and hard-to-access façades. | Consider for demanding façades requiring colour or gloss freedom. | Consider for defined moderate exposure and compatible grades. | Polyester grades are positioned for interiors and do not carry an exterior suitability. |
| Colour flexibility | Strong architectural palette; some effects need special coat build. | Broad palette, including vivid and higher-gloss possibilities. | Broad practical palette for general exterior use. | Broad decorative colour possibilities for approved interior grades. |
| Gloss possibilities | Often selected in controlled architectural gloss ranges. | Generally offers wider gloss flexibility. | Good practical gloss options; confirm shade and finish. | Decorative gloss options are available; gloss should not be treated as evidence of exterior durability. |
| Weathering tendency | Strong long-term exterior potential when the complete system is correct. | Strong exterior potential with premium design freedom. | Good moderate-exposure performance; harsher exposure needs careful review. | Lower exterior weathering resistance than SDP and fluoropolymer systems; use within approved interior applications. |
| UV and chalk resistance | High potential in a verified architectural system. | High potential in a verified architectural system. | Higher than standard polyester but generally below premium fluoropolymers. | Lower than SDP, PVDF and FEVE; Polyester grades are not positioned for exterior exposure. |
| Fabrication | Depends on alloy, temper, DFT, curing and routing. | Depends on the complete system and approved fabrication guidance. | Depends on film integrity, curing and substrate. | Depends on film integrity, curing and the thin aluminium substrate used in the approved interior grade. |
| Price tendency | Premium | Premium | More economical than premium fluoropolymers in many specifications | Generally economical / value-led |
| Warranty tendency | Longer warranties may be available on selected grades and colours. | Project- and product-specific; confirm current written terms. | Defined exterior warranties may be available on selected grades and colours. | Current Polyester grades have no exterior warranty. |
| Main buyer caution | Do not accept the label without grade, skin, DFT and warranty evidence. | Confirm actual product availability, approved colours and system data. | Do not confuse it with standard polyester or overextend its exposure category. | PE here means Polyester coating. Do not confuse it with the polyethylene/LDPE core, and do not assume an interior Polyester finish is suitable outdoors. |
Grade references: Polyester on our AL312 and AL32 interior grades at 15–18 microns with no exterior warranty. Selected SDP grades are listed at 25–28 microns with 10-year warranties, while selected PVDF grades are listed at 25–28 microns with 15-year warranties. FEVE and any 30–35 micron / three-coat terms should be confirmed with us against the current product, colour, and written quotation or warranty. These are our grade-level references, not a universal promise for every shade, finish, location, or project.
Pairwise decisions
PVDF vs FEVE vs SDP
We do not declare one universal winner. We identify the coating that best fits exposure, appearance, access, budget and the approved product grade.
PVDF vs FEVE
PVDF may be preferred for a conservative, widely recognised architectural specification. FEVE may be preferred when premium weatherability must be paired with broader gloss, brighter colour or special-effect capability.
Decision: compare the actual paint system, approved colour, DFT, substrate and warranty—not only the resin family.
PVDF vs SDP
PVDF is generally considered for more demanding exterior risk and difficult future access. SDP can be sufficient for moderate exterior exposure when the building, grade, colour and maintenance plan are compatible.
Decision: use lifecycle risk and exposure severity to justify the premium, rather than assuming higher cost is always necessary.
FEVE vs SDP
FEVE offers a premium fluoropolymer route for expressive colours and gloss. SDP offers a practical value route for moderate exterior work. Both require documented system data and shade-specific warranty review.
Decision: use FEVE for premium exterior design freedom; consider SDP for balanced exterior value.
Paint quality beyond the name
What we check beyond the coating name
A resin label is only one part of coating quality on ACP. Our technical teams evaluate the complete ACP sheet coil coating process and the finished product.
Resin and pigment
Binder quality, pigment stability and compatibility affect colour, gloss and weathering.
Surface preparation
Cleaning and pretreatment influence adhesion and long-term film integrity.
Primer compatibility
The primer must suit the aluminium substrate and topcoat system.
Coating uniformity
DFT, colour and gloss consistency must be controlled across the coil and batch.
Curing
Incomplete or inconsistent curing can affect adhesion, hardness and fabrication.
Batch control
Traceability helps match approved samples, production identity and supplied material.
Fabrication response
Routing, bending and rolling depend on coating, alloy, temper and panel construction.
Storage and film removal
Protective film and storage affect delivered appearance but are not the coating itself.
Testing and warranty
Adhesion, DFT, gloss, weathering and written exclusions complete the evidence.
Paints used for aluminium alloys
Why aluminium preparation and alloy selection matter
Architectural aluminium may be coated with polyester, SDP, PVDF or FEVE, but the finish cannot be separated from the metal beneath it.
Aluminium naturally forms an oxide layer and may carry rolling oils or contaminants. We therefore treat cleaning, deoxidising, pretreatment, primer compatibility and curing as essential parts of aluminium coil coating. Post-painted aluminium and coil-coated aluminium should not be assumed equivalent because their preparation, application, curing and quality-control conditions differ.
Alloy and coating perform together: our product schedules use AA1100, AA3105 and AA5005 in different grades. Magnesium-bearing architectural alloys are selected where stronger exterior mechanical and corrosion-related properties are required, while the final application still depends on skin thickness, grade and engineering review.
Current grade relationships
- Polyester: AL312 and AL32 interior grades.
- SDP: AL3C, AL33, AL43, AL4E, AL4C and AL63; AL445 may be specified in SDP or PVDF.
- PVDF: AL33D, AL43D, AL45, AL45D and AL65, plus the relevant AL445 option.
- FEVE: referenced in our training and premium fluoropolymer guidance; current product and colour availability must be confirmed through the latest technical data and quotation.
Thin-coil verification
How should a PVDF claim on a very thin aluminium coil be checked?
At Aludecor, we advise buyers to verify claims of full architectural PVDF coating on very thin aluminium coils, including 0.25 mm coils. The feasibility and consistency of ACP sheet coil coating depend on coil handling, line tension, flatness, cleaning, pretreatment, primer and topcoat application, curing, cooling, rewinding and documented production capability.
Our current grade schedule lists PVDF on 0.30 mm, 0.45 mm and 0.50 mm aluminium skins; it does not list a 0.25 mm PVDF grade. This does not justify a universal claim of impossibility, but it does make a 0.25 mm PVDF claim one that requires clear technical evidence.
- Exact product and grade
- Both aluminium skin thicknesses
- Alloy and temper
- Pretreatment and primer
- Topcoat resin declaration
- Number of coats and documented DFT
- Coating-line capability
- Written colour- and location-specific warranty
- Test reports and batch traceability
- Delivered material matched to approved sample
PVDF claim checklist
ACP sheet coil coating should be verified through the complete product identity and evidence trail—not by a brochure line alone.
Identify the panel
- Product name and grade
- Total panel thickness
- Top and bottom skin thickness
- Alloy or grade where stated
- Core type
Identify the coating
- Pretreatment
- Primer
- Topcoat resin
- Number of coats
- Documented coating thickness
Identify the finish
- Colour code
- Gloss level
- Texture or effect
- Approved sample
- Batch direction and consistency
Confirm the promise
- Technical data sheet
- Paint documentation where relevant
- Written warranty and exclusions
- Test reports
- Batch traceability
Testing support: DFT and gloss checks support coating verification; adhesion and weathering tests evaluate performance; FTIR may help identify resin chemistry. Test selection and interpretation should be handled by a competent laboratory or technical professional.
ACP sheet features
How coating affects ACP sheet features
The coating influences the exposed surface, but it does not independently decide the entire panel’s performance.
Features the coating can influence
- Colour retention and visible fading
- Gloss retention and chalking
- Surface appearance and cleanability
- Stain response and scratch visibility
- UV and weathering response
- Batch consistency and maintenance
- Fabrication behaviour
- Warranty and ACP sheet price
Features the coating does not determine alone
- Core performance or fire classification
- Panel rigidity and wind-load capacity
- Aluminium skin thickness
- Total panel thickness
- Bond strength and delamination resistance
- Façade-system approval
- Installation quality and drainage
- Statutory compliance
Separate specifications
The Best ACP sheet core and the best coating are separate decisions
The Best ACP sheet core depends on fire strategy, occupancy, building height, application and project requirements. The coating system is selected for surface exposure, colour, finish, weathering, maintenance and warranty. A premium PVDF coating does not make a combustible or unsuitable core appropriate for a fire-sensitive façade. Equally, a fire-retardant core does not compensate for an interior-grade coating used outdoors. We evaluate coating, core, skin thickness, alloy, panel thickness, grade and installation together.
Complete-panel decision
Coating
Weathering, colour, gloss, cleaning and warranty.
Core
Fire behaviour, density, fabrication and classification potential.
Aluminium skins
Rigidity, flatness, strength, fabrication and cost.
Installation system
Wind load, joints, drainage, cavity barriers and approvals.
Application guidance
Applications of PVDF, FEVE and SDP coatings
We use application, exposure, design intent and maintenance access to shortlist the coating family.
Exterior façades
Review UV, rain, pollution, building height, colour stability, cleaning and consultant approval. PVDF or FEVE may be preferred for more demanding exposure.
Interiors
Lower weather exposure can make polyester or a decorative system sufficient. Consider cleaning, scratch visibility, colour, finish and price.
Signage
Separate indoor from outdoor signage. Check flatness, colour consistency, printing or vinyl compatibility, cleaning and exposure.
Canopies and soffits
Review directional UV, pollution, water runoff, edge detailing, access and shade consistency across visible planes.
High-UV, coastal or industrial sites
Use a project-specific exposure review and written warranty. Premium fluoropolymers may be appropriate, but the actual system must be confirmed.
Project matrix
Coating selection by project type
This matrix is a screening tool, not a specification substitute. We confirm the final coating and grade against project documents.
| Project type | Coating to consider | Why | Important checks | Warranty question |
|---|---|---|---|---|
| Interior wall cladding | Polyester / decorative system | Limited weather exposure | Cleaning, impact, finish, fire requirements | Is the finish approved for this interior use? |
| Retail interiors | Polyester, SDP or special finish | Colour and cleaning are key | Scratch visibility, batch and replacement access | What surface defects or cleaning methods are excluded? |
| Outdoor signage | SDP, PVDF or FEVE | Brand colour and UV exposure | Skin thickness, flatness, colour, print/vinyl system | Is brand colour covered at the project location? |
| Low-rise exterior | SDP or premium fluoropolymer | Exposure can range from moderate to severe | Height, wind, UV, pollution and access | Is the selected grade and colour covered? |
| Commercial façade | SDP, PVDF or FEVE | Risk depends on height and exposure | Alloy, skin, core, coat build and maintenance | What are the location and cleaning exclusions? |
| High-rise façade | PVDF or FEVE | Access difficulty and long-term exposure | Façade engineer review, grade, wind and fire strategy | Is high-rise application explicitly covered? |
| Canopy | SDP, PVDF or FEVE | Strong directional weathering and runoff | Top/bottom visibility, drainage and edge detailing | Are horizontal or near-horizontal surfaces covered? |
| Soffit | SDP, PVDF or FEVE | Often sheltered but pollution-prone | Moisture, cleaning and colour continuity | Does the warranty cover the actual orientation? |
| Parapet | PVDF or FEVE; SDP where approved | High UV and water exposure | Capping, runoff, joints and maintenance | Are parapet and horizontal zones included? |
| Corporate identity project | PVDF or FEVE; SDP for moderate exposure | Colour consistency is business-critical | Master sample, gloss, batch and replacement strategy | Is the exact corporate shade covered? |
| High-gloss decorative use | FEVE or approved special system | Broader gloss and colour possibilities | Scratch visibility, clear coat, sample and fabrication | Is high gloss covered without special exclusions? |
| Wood or special-effect finish | Approved multi-coat or effect system | Finish construction may differ from solid colour | Clear coat, pattern repeat, direction and batch | What part of the effect appearance is warranted? |
| High-UV location | PVDF or FEVE | Higher weathering demand | Pigment, colour, orientation and maintenance | Is high-UV exposure addressed in writing? |
| Coastal or industrial location | Project-specific PVDF or FEVE system | Aggressive environment and difficult maintenance | Substrate, edges, fixings, cleaning and consultant review | What coastal, industrial or pollution exclusions apply? |
ACP sheet price
How coating affects ACP sheet price
ACP sheet price may increase with a premium resin, stronger primer system, complex pigment, special effect, additional coat, custom colour, low-volume batch, higher aluminium skin, product grade, testing or longer warranty scope.
- PVDF and FEVE can cost more than standard decorative coatings.
- Metallic, mica, high-gloss and custom colours may need a different build.
- Minimum order quantity and production scheduling can affect custom shades.
- A lower price may also reflect a thinner skin, different core, shorter warranty or narrower commercial scope.
ACP paint warranty
How coating affects warranty
A warranty is a written commercial and technical commitment—not a synonym for expected service life. It may depend on coating, colour, gloss, location, exposure, aluminium skin, grade, fabrication, installation, cleaning, documentation and registration.
- Not every colour or effect carries the same terms.
- Project location and orientation can change exclusions.
- Selected current SDP grades publish 10-year warranties.
- Selected current PVDF grades publish 15-year warranties.
- FEVE terms must be confirmed for the actual product and colour.
Points buyers often miss
ACP sheet coil coating details that matter after the sample is approved
Several important coating variables are not obvious from a shade card or a newly delivered sheet.
The coating name is not the specification
Primer, pretreatment, pigment, coat build, curing and aluminium substrate can change performance within the same broad resin family.
Warranty may be shade-specific
Colour, gloss, effect, location and orientation can change written terms and exclusions.
Coil thickness affects capability
Handling, flatness, tension, curing and rewinding become more demanding as the aluminium skin becomes thinner.
Special finishes may use another build
Metallic, wood, high-gloss or bright effects may use a clear coat, additional coat or different approved system.
Protective film is not the coating
It protects the surface temporarily and must be handled and removed as directed; it is not part of the paint warranty.
Appearance at delivery is not enough
Long-term coating quality requires evidence on adhesion, DFT, gloss, weathering, batch identity and maintenance.
Common buyer mistakes
What can go wrong—and how to correct it
We see coating decisions fail when a colour name or low rate replaces a complete specification.
Choosing by colour name alone
Corrective action: approve colour, gloss, texture, resin family, coat build and grade together.
Treating every PVDF claim as equivalent
Corrective action: verify resin declaration, primer, DFT, aluminium skin, TDS, warranty and traceability.
Ignoring aluminium skin thickness
Corrective action: measure and document both skins; do not rely only on total panel thickness.
Ignoring primer and pretreatment
Corrective action: request the complete paint-system description and adhesion evidence.
Assuming every colour has the same warranty
Corrective action: obtain shade-, finish- and location-specific written terms.
Believing the lowest ACP sheet price is like-for-like
Corrective action: normalise coating, skins, alloy, core, grade, warranty and commercial scope.
Confusing coating with protective film
Corrective action: inspect coating documents separately and follow film-removal instructions.
Assuming a premium coating fixes the wrong core
Corrective action: select coating and core independently against exposure and fire strategy.
Accepting an unsupported thin-coil PVDF claim
Corrective action: request technical evidence, DFT, grade, warranty and batch identity.
Using an interior finish outdoors
Corrective action: confirm exterior approval, exposure suitability and written warranty.
Ignoring batch consistency
Corrective action: plan quantities, use one batch where practical and follow protective-film arrows.
Relying only on a brochure
Corrective action: retain the TDS, approved sample, test evidence, warranty, invoice and delivery labels.
Our Gallery
Inside Aludecor's coil-coating and inspection process
Explore selected views from our coating, handling and quality-control operations. These images help project teams understand that coating performance begins with controlled processes, not only the final colour.
Glade Centrum
Glade Centrum
Coal India Office, Kolkata
Coal India Office, Kolkata
CMC International School, Theethipalayam
CMC International School, Theethipalayam
BTR Layout Villa, Hyderabad
BTR Layout Villa, Hyderabad
Test Nahi Toh Trust Nahi
Verify coating claims before they become façade problems
In ACP sheet coil coating, visual approval is only the beginning. DFT, gloss, adhesion, solvent resistance, QUV, salt spray, boiling-water, freezing and other relevant checks help us evaluate the paint system and the complete panel.
We encourage project teams to preserve the approved sample, invoice, batch identity, protective film and product label, and to match the delivered material at site with the declared grade and coating.
Important: coating tests support due diligence. They do not replace the complete panel specification, façade engineering, fire strategy, installation review or statutory approval.
Need help selecting an ACP coating?
Share your project location, height, application, colour, finish, gloss, aluminium skin, core, panel grade, quantity and warranty expectations. We can help you shortlist the right coating family and the documents to verify.
Frequently asked questions
PVDF, FEVE, SDP and ACP sheet coil coating FAQs
These answers summarise the technical checks buyers, architects, dealers, fabricators and project teams should make before approval.