Commercial Cladding Refurbishment & RestorationTopSpray35 Aliphatic Polyurethane Protective Topcoat
Two-component aliphatic polyurethane protective topcoat specified for commercial cladding refurbishment and cladding restoration — restoring failing roof coatings, roof coating defects and weathered metal roofing. UV-stable, weather-resistant protection for commercial metal roof and cladding refurbishment. Not a standalone waterproofing membrane — substrate, preparation and primer must be confirmed before specification.
Chemistry
Two-Component Aliphatic Polyurethane
Application
Airless Spray — Minimum Two Coats
Colours
RAL Colour Range — Confirm at Specification
Warranty
25-Year Manufacturer / Up to 35-Year Complete-System (Qualifying)
Commercial Cladding Refurbishment & Restoration for Failing Roof Coatings
TopSpray35 is the Prokol protective topcoat specified for commercial cladding refurbishment and commercial cladding restoration — restoring faded, chalking and weathered metal cladding and roofing to a specified RAL colour while sealing the building envelope against UV degradation, cut-edge corrosion and further coating breakdown. Specified and supplied by Forti Nova for commercial roof refurbishments where the existing substrate is structurally sound but the surface has failed.
TopSpray35 is a confirmed system response to failing roof coatings, roof coating failure and roof coating defects on profiled metal roofs and cladding — peeling and delamination, UV chalk, colour fade, cut-edge corrosion and surface breakdown. Where substrate assessment confirms the deck remains sound, TopSpray35 is applied over the manufacturer-approved primer and build-up to restore the protective envelope without full roof replacement. It is not a repair for structural failure, active leaks without a waterproofing base, or delaminating coatings the new system cannot bond to.
Forti Nova — UK specialists for Forti Nova cladding systems, handling supply and specification of Prokol TopSpray35 for commercial and industrial cladding refurbishment projects. Forti Nova supplies and specifies the system; site installation is carried out by trained, manufacturer-approved applicators, with the project-specific warranty pathway confirmed before works commence.
TopSpray35 Quick Answers
Forti Nova works directly with Prokol as an Outreach Partner, supporting TopSpray35 specifications through assessment, system design, product supply, training and warranty-pathway coordination.
What it is
What is TopSpray35?
TopSpray35 is a two-component aliphatic polyurethane protective topcoat used over suitable polyurea, polyurethane, epoxy, concrete and steel systems. It provides UV-stable, weather-resistant protection for commercial metal roof and cladding refurbishment. It is a protective layer within a complete system — not a standalone waterproofing membrane.
What it is used for
What is TopSpray35 used for?
UV-stable weather protection and lifecycle extension for metal roofs, cladding, and prepared polyurea, concrete and steel substrates within a confirmed project-specific coating system.
What it is not
What is TopSpray35 not designed to do?
It is not a standalone waterproofing membrane, repair compound, primer, traffic-bearing system by default, universal cladding system or universal chemical-resistant lining.
Warranty position
What warranty applies?
A 25-year manufacturer warranty is available for TopSpray35 on qualifying installations. An up-to-35-year complete-system warranty may be available on qualifying metal-roof or cladding specifications where the exact manufacturer-approved build-up, application requirements and warranty pathway are confirmed. All warranty positions are project-specific and conditional.
Before specifying
What must be confirmed before specifying TopSpray35?
Substrate type and condition, existing system build-up compatibility, primer requirements, colour specification (RAL), and confirmation that a waterproofing base is in place where required.
Who specifies and applies
Who should specify or apply TopSpray35?
Specification by competent project professionals; application by trained approved contractors working to the confirmed system. Primer and coverage rates must be confirmed per project.
System role
What is the system role of TopSpray35?
TopSpray35 is a protective topcoat applied over suitable confirmed substrates and coating systems. It provides colour, weather and UV protection but does not waterproof independently. Where waterproofing is required, the project specification must include a compatible waterproofing system confirmed for the substrate.
Related TopSpray35 Guidance
Protection, Not Waterproofing
TopSpray35 is a UV-stable aliphatic topcoat that protects the underlying waterproofing or coating system from UV degradation and weather. It is specified for commercial metal roof and cladding refurbishment where lifecycle extension, colour restoration and long-term durability are required. It does not waterproof independently.
Metal Roof Refurbishment
UV-stable aliphatic protection over weathered metal roofing. Restores colour, protects against further UV and weather degradation, and extends asset lifecycle. Applied over suitable primers and prepared metal substrates.
Cladding Refurbishment
Industrial and commercial cladding renewal. Spray application provides speed and coverage efficiency on large elevations. Colour restoration in RAL range available, confirm at specification stage.
Over Suitable Waterproofing Membranes or Coating Systems
TopSpray35 may be applied over a suitable confirmed waterproofing membrane or coating system as the UV-stable protective topcoat layer. Where TopSpray35 is applied over a product from another manufacturer, compatibility, preparation and warranty implications must be confirmed for the exact project specification.
Concrete, Polyurea & Steel Substrates
May be applied over prepared polyurea, polyurethane, epoxy, concrete and steel systems where UV-stable surface protection is required. Substrate condition, preparation and primer must be confirmed before application.
Understanding the System Roles
Waterproofing Membrane
Where waterproofing is required, the project needs a compatible membrane or waterproofing system selected for the substrate, exposure and required build-up. TopSpray35 does not fulfil this role independently. Where TopSpray35 is applied over a waterproofing membrane or coating from another manufacturer, compatibility, preparation and warranty implications must be confirmed for the exact project specification.
TopSpray35 — Protective Topcoat
TopSpray35 is an aliphatic polyurethane protective topcoat applied over suitable confirmed substrates and coating systems. It provides colour, weather and UV protection but does not waterproof independently. Applied by airless spray at 0.15–0.30 kg/m²/layer with a minimum of two coats.
25-Year Manufacturer Warranty — Up to 35-Year Complete-System Warranty
A 25-year manufacturer warranty is available for TopSpray35 on qualifying installations. An up-to-35-year complete-system warranty may be available on qualifying metal-roof or cladding specifications where the exact manufacturer-approved build-up, substrate preparation, application requirements and warranty pathway are confirmed. All warranty positions are project-specific and conditional on substrate, preparation, system build-up, trained applicator, application records and manufacturer acceptance. Confirm warranty pathway for your project →
Is TopSpray35 suitable for your project?
Suitability depends on the substrate type, existing system build-up, surface condition, contamination, drainage and whether waterproofing is required beneath. Visual inspection alone is insufficient. Substrate assessment and preparation scope must be confirmed before TopSpray35 can be correctly specified.
Assessment Required
Primer selection, substrate compatibility and preparation scope must be confirmed per project. Application requires suitable dry conditions — no application below 5°C, in rain or frost.
Potentially Suitable Applications
Subject to substrate condition, preparation, primer confirmation and system build-up assessment for the specific project.
- Metal roofs — structurally sound, prepared, primed
- Industrial and commercial cladding — condition assessed
- Over suitable confirmed waterproofing membranes or coating systems — compatibility established
- Polyurea, polyurethane and epoxy substrates — confirmed compatibility
- Concrete and steel structures — preparation and primer confirmed
- Colour restoration projects — RAL colour specification
Not Suitable For
- Standalone waterproofing — a membrane must be confirmed beneath where required
- Vehicle traffic or car park decks — use traffic-bearing system
- Damp or wet substrates — moisture must be resolved first
- Structurally unsound substrates — engineering repair required first
- Silicone-contaminated surfaces — silicone must be removed
- Application below 5°C or in rain or frost
- Below-ground waterproofing applications
Survey Requirements
- Substrate type and condition identification
- Existing coating type and adhesion assessment
- Silicone and contamination survey
- Moisture and drainage fall assessment
- Primer requirement confirmation per substrate
Cannot Assume Without Assessment
- Primer requirement — varies by substrate
- Chemical compatibility with existing coatings
- Sub-surface moisture content
- Drainage adequacy under operational conditions
- Waterproofing adequacy of existing build-up
Possible Failure Indicators
Blistering after application
Possible contributing causes include elevated substrate moisture at application, which can prevent film formation and allow vapour pressure to develop beneath the coating under thermal cycling.
Required Response
Investigate and identify moisture source. Strip affected areas, allow substrate to dry to within specified limits, reconfirm substrate condition and reapply within confirmed conditions.
Progressive debonding or adhesion loss
Possible contributing causes include silicone contamination not fully identified or removed at preparation stage. Silicone contamination can prevent reliable adhesion and must be removed or otherwise addressed within the confirmed preparation specification. Inadequate primer or incorrect primer for the substrate type are also possible causes.
Required Response
Investigate adhesion loss across the substrate. Survey for silicone use and confirm preparation scope. Review primer selection for the specific substrate with the technical team.
Peeling, delamination or local coating failure
Possible contributing causes include inadequate primer adhesion, incorrect primer for the substrate, application outside the stated temperature or humidity limits, or insufficient surface preparation before application.
Required Response
Inspect affected area to determine root cause. Review application records. Confirm ambient conditions were within TDS limits and primer was correctly selected and applied for the substrate.
Specification Data
- Chemistry
- Two-component, solvent-containing, eggshell-gloss aliphatic polyurethane topcoat
- Application Method
- Airless spray
- Number of Coats
- Minimum two coats
- Consumption
- Approx. 0.15–0.30 kg/m²/layer
- Pot Life
- Approx. 30 minutes at 20°C (1 kg quantity)
- Surface Temperature
- +5°C to +35°C
- Product Temperature
- +10°C to +35°C
- Relative Humidity
- Below 85%
- Dew Point
- Substrate at least 3°C above dew point
- Colours
- RAL colour range — confirm current colour overview. Other colours available on project basis and on request.
- Primer Requirement
- Substrate-dependent — must be confirmed per project. Cannot be assumed in advance.
Application Method & Preparation
Applied by airless spray. A minimum of two coats is required at 0.15–0.30 kg/m²/layer. An induction time of 5 minutes applies after mixing. Substrate must be clean, dry, degreased and free from loose material, corrosion, silicone and delaminating coatings before application. Rust treatment, mechanical preparation and priming must be confirmed per substrate type and condition. Coverage rates and coat sequence must comply with the confirmed system specification.
Note: Primer requirements are substrate-specific and must be confirmed during project assessment — they cannot be assumed in advance. Confirm primer requirement and compatibility with the Forti Nova technical team before specification.
Environmental Controls & Programme
Application requires surface temperature between +5°C and +35°C, product temperature between +10°C and +35°C, and relative humidity below 85%. The substrate must be at least 3°C above dew point. No application in rain or frost. Preparation duration depends on the area, access, existing coating condition, corrosion, required repairs, cleaning method, primer requirements and site conditions. The preparation sequence and programme are confirmed at project level. Application records must be maintained throughout the project for warranty pathway compliance.
Warranty
25-Year Manufacturer Warranty / Up to 35-Year Complete-System Warranty
25-year manufacturer warranty available on qualifying TopSpray35 installations. Up-to-35-year complete-system warranty requires confirmation of the exact manufacturer-approved build-up, substrate, preparation and warranty pathway. All of the following conditions apply to both warranty positions.
Substrate structurally sound and dry
Substrate must be free from structural defects, active moisture, delamination and contamination at time of application.
Trained approved applicator
Warranty pathway requires trained and approved contractor application. Application records must be maintained.
Primer confirmed and applied per substrate
Primer selection and application is the adhesion foundation. Primer requirement must be confirmed per substrate type — not assumed.
Detailing complete at all terminations
Penetrations, laps, upstands, abutments and gutters detailed to the confirmed system specification.
Full system build-up maintained
Coverage rate, coat sequence and full system specification must comply with the confirmed TDS for the project.
Drainage adequacy confirmed
Standing water accelerates coating degradation. Drainage falls and outlet condition must be adequate at time of installation.
Gallery & Documents
TopSpray35 project imagery and approved technical documentation.
Spray application of protective topcoat to commercial metal roof — Forti Nova project
Airless spray application of aliphatic topcoat on commercial roof surface
Large-scale commercial roof coating installation — Forti Nova project
Continuous spray application across commercial roof area
Aliphatic protective coating applied to industrial roof — Forti Nova project
Spray-applied coating installation on industrial roof surface
Protective coating application process on metal roof substrate
Completed protective topcoat installation on commercial roof
Industrial building roof coating installation — Forti Nova project
Protective coating application across large commercial roof area
Detail view of spray-applied aliphatic coating on roof substrate
Technical Documentation
TopSpray35 Technical Documentation — Available on Request
Technical Data Sheets, Safety Data Sheets and application guidance are available directly from our technical team. Email Info@FortiNova.co.uk with the product name and document type required.
TopSpray35 — Technical Information
Rocathaan Topspray 35 — Product Data Sheet (Article 16025, EN)
Available to download. Last revised 27-10-2025.
Safety Data Sheet
Available on request — contact technical team.
Rocathaan Topspray 35-TR — Product Data Sheet (Article 16027, Transparent Variant)
TopSpray35-TR is a separate transparent variant with different finish, density, consumption, pot life and application methods. Available on request for projects requiring the transparent system.
Related Systems
Important: All technical datasheets and safety documentation must be reviewed prior to specification and installation. Any warranty is project-specific and conditional on full compliance with manufacturer application requirements and trained approved applicator installation.
TopSpray35 Common Questions
Specification intelligence for contractors, specifiers and facilities managers.
Discuss a TopSpray35 Project
Submit your project details for technical assessment, system-selection support, specification guidance and manufacturer-supported warranty-pathway coordination.
Substrate & System Assessment
Existing coating compatibility, moisture condition, primer requirement and system build-up reviewed and established for the project before specification.
Specification Guidance
Preparation scope, primer selection, coverage rates and application conditions reviewed and established for your project.
Warranty-Pathway Coordination
25-year manufacturer warranty or up-to-35-year complete-system warranty pathway and trained applicator requirements confirmed before works commence.
TopSpray35 Applicator Training — Blackburn, UK
Hands-On Product Training
Forti Nova hosts comprehensive TopSpray35 application training at our Blackburn facility. Practical, hands-on instruction covering substrate preparation, mixing ratios, application techniques, detailing, and quality control. Designed for contractors and applicators seeking specification-grade installation capability.
- Substrate assessment and preparation protocols
- System-specific mixing and application
- Detailing for complex geometries
- Quality control and inspection procedures
- Environmental constraints and cure management
Approved Applicator Network
Forti Nova maintains a network of trained TopSpray35 applicators across the UK. Specifiers and main contractors can request approved applicators for project tender and execution. Training ensures consistent application quality, specification compliance, and warranty validation support.
For Contractors
Become a Forti Nova approved applicator. Training, technical support, and project referral network access.
For Specifiers
Request approved applicators for tender lists. Verified training, technical capability, and warranty compliance support.
Training & Specification Support
Use the contact wizard to request training, join the applicator network, or specify TopSpray35 for your project.
Related Applications & Prokol Systems
Is TopSpray35 suitable for your project?
Request a technical assessment to confirm substrate compatibility, system build-up and warranty pathway.