BoPin 260 All-Weather Window & Door MS Sealant

BoPin 260 All-Weather Window & Door MS Sealant

BoPin 260 is a single-component, moisture-curing MS polymer sealant specifically formulated for window and door perimeter sealing and general indoor and outdoor joint sealing applications. Based on modified silane polymer technology, it cures at room temperature to form a durable, flexible rubber with excellent adhesion to aluminium, glass, concrete and masonry — typically without primer. Unlike silicone-based window sealants, the MS polymer formula is paintable after cure, can be applied to slightly damp surfaces, and produces no corrosive byproducts during cure. Suitable for both interior and exterior applications across a wide temperature range, making it a versatile choice for professional window and door installers working across varied climate conditions.

Main Benefits

Paintable after cure — compatible with most water-based and solvent-based paint systems, unlike silicone alternatives
Can be applied to slightly damp surfaces — practical advantage in humid or tropical climates
Excellent adhesion to aluminium, glass, concrete and masonry without primer
Solvent-free, isocyanate-free formula — safe for use in occupied buildings
Good elongation (368%) — accommodates thermal and structural movement at window and door joints
Non-corrosive — safe for all metal frame types including aluminium and galvanised steel
Suitable for interior and exterior applications

Adhere To

Aluminium and powder-coated aluminium profiles
Glass and coated glass
Concrete and masonry
Brick and blockwork
Timber and engineered wood frames
Most common metals and coated metals

Application Areas

Perimeter sealing of aluminium and PVC window frames to wall openings
Metal and timber door frame to wall joint sealing
Window and door frame gap filling and weatherproofing
General indoor and outdoor joint sealing and gap filling
Sealing applications requiring subsequent painting over the sealant

Package

300ml cartridge — 24 units per carton
600ml sausage pack — 20 units per carton
Available colors upon request

其他信息

Curing System	MS Polymer (moisture cure)
Density (g/cm³)	1.48
Hardness (Shore A, 7D)	58
Tensile Strength (MPa)	1.59
Elongation at Break (%)	368
Skin Formation Time (min)	16
Cure Rate (depth, mm/24h)	2.5
Extrudability (g/5s)	82
Aluminium Bonding	Pass
Glass Bonding	Pass
Shelf Life	12 months (unopened, ≤27°C)
Color	Black, Customized, Grey, White

Surface Preparation — Ensure all surfaces are clean and free from dust, grease and old sealant residues. Can be applied to slightly damp surfaces — avoid application during active rain or when surfaces are wet with standing water.
Application — Cut cartridge tip at 45°, load into sealant gun and apply with steady, even pressure into the joint. Tool within 15 minutes using a spatula dampened with soapy water. Apply masking tape for clean joint lines.
Curing — Allow to cure at room temperature with adequate ventilation. Full mechanical properties develop after 7 days. Paint only after full cure.
Cleanup — Remove uncured product with a suitable solvent before skin formation. Cured product must be removed mechanically.

Limitations

Not suitable for PE, PP or PTFE surfaces
Not suitable for structural glazing applications
Not recommended for continuous water immersion
Not suitable for surfaces containing plasticiser or solvent residues
Not suitable for direct application to glass surfaces under direct UV exposure — use BoPin 220 silicone for glass-to-glass or UV-exposed glazing applications
Do not apply when substrate temperature is below 4°C or above 40°C

Tips

The key advantage of 260 over silicone alternatives is paintability — specify this product when the joint will be painted over as part of the finished decoration
In tropical and high-humidity climates, the ability to apply to slightly damp surfaces reduces installation downtime after rain
Not suitable for UV-exposed glass surfaces — for glass-to-glass or glass-to-frame sealing where UV exposure is a factor, use BoPin 220 silicone instead
Store cartridges upright in a cool, dry location away from heat and direct sunlight