Commercial roof refurbishment
A seamless renovation membrane considered for suitable existing roof build-ups after survey, preparation and detail design.
Prokol · specialist spray technology
HotSpray polyurea roofing.
Highly reactive, solvent-free aromatic pure polyurea for seamless roof waterproofing—specified for the substrate, build-up and operating conditions rather than sold as a universal coating.
The essential distinction
HotSpray is not SprayGrade. Different chemistry. Different equipment. Different project fit.
Assess project suitabilityTechnology before marketing
Fast reaction. Seamless protection. Controlled specification.
Prokol describes Rocathaan Hotspray PA 260-FR as a highly reactive, solvent-free hotspray coating based on aromatic pure polyurea, developed as seamless waterproofing for old and new roofs and polyurethane foam.
The roof still needs the correct preparation, primers, detailing and application conditions for the system to perform properly.
Where it can fit
When HotSpray is suitable.
Every application remains conditional on survey, compatibility and the confirmed system build-up.
New and existing roofs
Rocathaan Hotspray PA 260-FR is manufacturer-described for seamless waterproofing of old and new roofs.
Insulation build-ups
The manufacturer lists polyurethane foam, XPS and PIR among suitable applications, subject to the tested and specified build-up.
Complex geometry
Rapid spray application follows changes in form and can create a continuous membrane across suitable prepared details.
What must be confirmed before application.
01
Roof and substrate condition
02
Moisture and adhesion
03
Preparation and primer route
04
Detail design and interfaces
05
Weather and overspray control
06
Specified thickness and application records
07
Tested external-fire build-up where required
08
Inspection and project warranty route
HotSpray in application
Specialist spray equipment and controlled application.
These photographs show the application method, masking, complex geometry and completed membrane. They are not presented as named case studies or location claims.
Clear answers
HotSpray polyurea questions
Chemistry, suitability, fire classification and project delivery
What is HotSpray polyurea roofing?
HotSpray is a specialist plural-component spray-applied coating technology. Rocathaan Hotspray PA 260-FR is a highly reactive, solvent-free aromatic pure-polyurea product developed by Prokol for seamless roof waterproofing on suitable old and new roofs and specified insulation build-ups.
Is HotSpray the same as Liquid Rubber SprayGrade?
No. They are different chemistries, application systems and specification routes. SprayGrade is a two-component water-based liquid-rubber membrane. Prokol HotSpray is a highly reactive aromatic polyurea applied with specialist heated plural-component equipment.
Can HotSpray be used on every commercial roof?
No. Substrate identity, moisture, adhesion, roof condition, falls, details, preparation, access, weather and overspray controls all affect suitability. The product must sit inside a confirmed project build-up.
Is HotSpray fire rated?
Prokol lists EN 13501-5 external-fire classifications including BROOF(t1), BROOF(t2) and BROOF(t4) for specific tested assemblies. A classification belongs to the tested roof build-up and must not be treated as a blanket rating for every substrate or project.
Does aromatic polyurea need a topcoat?
Aromatic polyurea can change colour under ultraviolet exposure. Whether a compatible aliphatic topcoat is required depends on the finish, exposure, system design and manufacturer specification; colour change is distinct from loss of waterproofing performance.
Who delivers HotSpray projects?
Forti Nova supports technology selection, manufacturer input, materials and specification. Installation is delivered through suitably trained approved contractors using specialist plural-component equipment and agreed quality controls.
What warranty is available?
Warranty availability is project specific and depends on the tested system, substrate, preparation, application controls, inspection records and manufacturer approval. The confirmed written project specification takes precedence over generic marketing claims.
Commercial project assessment