TECHNICAL ANSWER
What is the chemistry for MonoSealant?
MS Polymer. 1-component, moisture-curing, free of isocyanate, solvents and silicone.
PROKOL MONOSEALANT · LAPS, JOINTS & DETAILING
Seal the moving detail before you coat the elevation.
MonoSealant is the flexible MS-Polymer detailing product for compatible laps, connection joints and local interfaces. It belongs where movement or a joint needs a flexible bonded seal — not where a rigid topcoat is being asked to bridge a failed detail.
Technology
1-component MS Polymer
Pack
290 ml cartridge (14030-290)
Skin formation
15 minutes at 23°C / 55% RH
Temperature range (cured)
-40 to +90°C
QUICK ANSWER 1
Is MonoSealant just for EPDM?
No. Prokol states unique adhesion properties on EPDM, but MonoSealant is also specified for roof, facade, floor and pond structures and for bonding plastics, metals, alloys, wood, concrete and compatible paint systems.
QUICK ANSWER 2
Can MonoSealant be applied to a damp surface?
Yes — Prokol's PDS states it adheres to most surfaces even moist and damp without a primer. The surface must still be stable, compatible and free of grease and dust.
QUICK ANSWER 3
How many square metres does one tube cover?
Coverage is governed by bead width and depth — calculate linear metres from joint geometry, not m².
QUICK ANSWER 4
Where does it fit in cladding refurbishment?
At compatible laps, joints and local details that require flexible sealing before or as part of the specified protective build-up.
PROBLEM → SOLUTION
Problems MonoSealant is designed to deal with
Start with the defect, not the product name. That is the safest way to understand whether this system belongs on the job.
Open or leaking cladding laps
Treat the lap as a detail problem first. A flexible compatible seal can be required before the surrounding coating system is completed.
Cracked old sealant
Failed joint material and joint geometry should be dealt with before the main coating rather than buried beneath it.
EPDM-to-metal interface
MonoSealant is particularly relevant because Prokol states strong adhesion to EPDM, subject to substrate condition and compatibility.
Slightly damp joint surface
Manufacturer guidance allows adhesion to many compatible moist and damp surfaces without primer, but contamination, standing water and unstable material still need to be avoided.
Permanent water load or dilation joint
Not the answer. These are specifically outside the product's stated limitations.
Structural gap or failed panel fixing
Not the answer. Sealant cannot correct structural movement, missing fixings or panel failure.
ANSWER IN 30 SECONDS
What is MonoSealant?
Rocathaan MonoSealant is a durable professional adhesive sealant based on MS-Polymer technology with unique adhesion properties on EPDM. It moisture-cures into a durable rubber that retains elasticity. Specially designed for adhesion and sealing of EPDM, roof, facade, floor and pond structures, sealing construction joints, and bonding plastics, metals, alloys, treated and untreated wood, concrete and compatible coating systems. Also used as a repair adhesive for old MS-Polymer joints. Free of isocyanate, solvents and silicone.
BEST FIT
compatible laps, connection joints, EPDM interfaces and local roof or facade details where a flexible bonded seal is required and the substrate has been correctly prepared.
WHERE IT FITS IN THE JOB
1
Identify the movement detail
Confirm the defect is a joint, lap or local interface that needs flexible sealing rather than structural repair.
2
Prepare the interface
Apply to stable, compatible, dry, uncontaminated, grease-free and dust-free surface. Ensure correct joint dimensions for maximum movement performance.
3
Apply and integrate
Tool the sealant to the required joint geometry. Paintable with emulsion paints. Integrates with the surrounding waterproofing or coating system.
Suitable uses & substrates
EPDM adhesion and sealing (unique adhesion properties per Prokol PDS)
Roof, facade, floor and pond structure joints
Plastics, metals and alloys where compatible
Mineral, coarse and rough surfaces
Treated/untreated wood, concrete and compatible coating/lacquer systems
Moist and damp surfaces without a primer (per manufacturer PDS)
Internal and external use
Do not use the product to hide the wrong problem
Not suitable for continuous water loads, dilation joints or glazing joints.
Not suitable for PE, PP, PC, PMMA, PTFE, soft plastic or neoprene.
Not suitable in direct contact with natural stone, foodstuffs or silver-coated mirrors.
Adhesion on bitumen is limited to breakage in the surface.
Not fungicidal. A 290 ml cartridge is a linear-joint product — coverage is governed by bead dimensions, not m².
Test adhesion and material compatibility in advance on unknown surfaces.
TECHNICAL QUESTIONS & ANSWERS
Technical facts, answered in plain English.
Useful product data should answer a question, not sit in a wall of specification cards. These answers use the current technical information for MonoSealant.
TECHNICAL ANSWER
What is the colour for MonoSealant?
Black. Liquid and cured product.
TECHNICAL ANSWER
What is the pack for MonoSealant?
290 ml cartridge. Article 14030-290.
TECHNICAL ANSWER
What is the density for MonoSealant?
1.48 kg/l. Mixed product.
TECHNICAL ANSWER
What is the skin formation time for MonoSealant?
15 minutes. At 23°C / 55% RH.
TECHNICAL ANSWER
What is the shrinkage for MonoSealant?
None. Non-shrink and blister-free.
TECHNICAL ANSWER
What is the elongation for MonoSealant?
300%. DIN 53504.
TECHNICAL ANSWER
What is the tensile strength for MonoSealant?
0.75 MPa. DIN 53504.
TECHNICAL ANSWER
What is the modulus at 100% for MonoSealant?
0.30 MPa. Per Prokol PDS.
TECHNICAL ANSWER
What is the shore hardness for MonoSealant?
A18. DIN 53505.
TECHNICAL ANSWER
What is the temperature resistance (cured) for MonoSealant?
-40 to +90°C. Once fully cured.
TECHNICAL ANSWER
What is the application temperature for MonoSealant?
+5 to +40°C. Ambient and surface.
TECHNICAL ANSWER
What is the shelf life for MonoSealant?
At least 12 months. Stored dry at +15–+25°C, unopened.
REAL APPLICATIONS
See the sort of details this product is used on.
STRAIGHT ANSWERS
The questions people actually ask about MonoSealant.
Is MonoSealant just for EPDM?
No. Prokol states unique adhesion properties on EPDM, but MonoSealant is also specified for roof, facade, floor and pond structures and for bonding plastics, metals, alloys, wood, concrete and compatible paint systems.
Can MonoSealant be applied to a damp surface?
Yes — Prokol's PDS states it adheres to most surfaces even moist and damp without a primer. The surface must still be stable, compatible and free of grease and dust.
How many square metres does one tube cover?
Coverage is governed by bead width and depth — calculate linear metres from joint geometry, not m².
Where does it fit in cladding refurbishment?
At compatible laps, joints and local details that require flexible sealing before or as part of the specified protective build-up.
What are the mechanical properties?
Elongation 300% (DIN 53504), tensile strength 0.75 MPa, modulus at 100% 0.30 MPa, Shore hardness A18, skin formation 15 minutes at 23°C.
PROBLEM-LED ANSWERS
What problem are you actually trying to solve?
The technical facts are already above. These answers start with the leak, defect or site condition so it is clear when MonoSealant belongs in the solution — and when it does not.
My cladding laps are opening and letting water track behind the sheets — is this a coating problem or a joint problem?
Treat it as a joint/detail problem first. A main cladding coating should not be expected to bridge a failed moving lap by itself. Where the substrates are compatible, MonoSealant can be used to create a flexible bonded seal before the surrounding refurbishment system is completed.
The old sealant has cracked along a facade joint — can I simply coat over it?
No. Failed joint material should be assessed and the joint geometry dealt with before the main coating stage. MonoSealant is intended for compatible connection joints and flexible details; coating over a failed joint can leave the original movement defect unresolved.
I need to seal an EPDM-to-metal detail — is MonoSealant relevant?
Yes, this is one of the situations where MonoSealant is particularly relevant. Prokol states unique adhesion properties on EPDM, including moist and damp surfaces, subject to the surface remaining stable, compatible and free from grease and dust.
The joint is damp when we arrive — does that automatically stop the repair?
Not necessarily. The manufacturer states MonoSealant can adhere to most compatible surfaces when moist or damp without a primer. That does not mean it should be applied over contamination, standing water, unstable material or an unsuitable substrate.
Can MonoSealant fix a permanently water-loaded joint?
No. The product limitations exclude continuous water loads and dilation joints. If the detail is permanently submerged, structurally moving beyond the sealant design or failing because of the building geometry, the detail needs a different specification.
How do I know how many tubes I need for failed laps?
Calculate by linear metres and bead dimensions, not square metres. A 290 ml cartridge is a joint product; bead width and depth determine how much length one cartridge will cover.
RELATED QUESTIONS & TOPICS
Problems and applications connected to this system
roof lap sealantcladding joint sealantEPDM sealantMS polymer roof sealantmetal cladding lap sealingroof joint repairfacade joint sealantMonoSealant 290mlsealant for damp surfacesflexible waterproof joint sealantisocyanate-free sealant
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