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Adheseal N-40 300ml neutral cure silicone sealant tube for flexible, waterproof joint sealing on metals, glass and constru...
Adheseal N-40 300ml neutral cure silicone sealant tube for flexible, waterproof joint sealing on metals, glass and constru...

Adheseal N40 Silicone Sealant

Neutral-cure silicone for roofing, metal flashings, wet areas and general construction sealing. Flexible ±25% joints with mould-inhibiting fungicide.

Vendor: Adheseal
SKU: 180100006
Availability: In Stock
$6.75
$6.75
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Description  

Adheseal N40 is a neutral-cure silicone sealant for metal roofing, flashings, shower joints and general construction weathersealing. Its non-corrosive oxime cure suits compatible aluminium, galvanised steel, Zincalume and Colorbond, while an added fungicide helps inhibit mould growth on the sealant in humid environments.

Choose N40 when a flexible, UV-resistant silicone is needed across roofing, plumbing and wet-area work. The cured joint accommodates ±25% movement. Unlike paintable acrylic sealants, N40 is not paintable.

Where to use N40

  • Metal roofs and gutters: sealing compatible flashings, laps and gutter junctions.
  • Bathrooms and laundries: waterproof sealing of sound tiled corners and fixture junctions.
  • Kitchen and commercial wet areas: non-corrosive sealing on compatible tile, glass and bench surfaces.
  • Marine and vehicle fabrication: weathersealing compatible non-structural assembly seams.
  • Electrical and air-conditioning installations: sealing suitable penetrations and equipment interfaces.

Application and selection

Apply to sound, dry, clean surfaces. Control sealant depth with backing rod and avoid three-sided adhesion. Check adhesion on coatings and sensitive substrates, and allow moisture curing before water exposure. N40 is not intended for structural glazing, mirrors, aquariums, pool immersion, trafficable walkways or polycarbonate sheeting. Test natural stone for staining and be aware of possible discoloration on copper and brass.

Common Questions  

Is N40 suitable for metal roofing?
Yes. Its neutral-cure chemistry is non-corrosive and suits zincalume, Colourbond, aluminium and galvanised metal.

Can N40 be used in swimming pools?
Do not install it for underwater pool applications. Once fully cured it is rated for below-waterline applications, but it is not an aquarium sealant.

Can N40 be painted?
No. Cured N40 silicone is not paintable.

What movement can N40 accommodate?
Physical-property testing records up to ±30% movement, with ±25% joint movement used for service design.

Uses & Benefits  
Neutral-cure silicone for roofing, plumbing, wet areas, marine work and general industrial sealing. Non-corrosive oxime cure suits galvanised steel, zincalume, Colourbond and other sensitive metals. Provides high elastic recovery and up to ±30% movement in physical-property testing, with ±25% service joint movement. Service temperature range is -50°C to +150°C after cure. Contains fungicide to inhibit fungal growth in hot, humid environments.
How To Apply  
Apply between 5°C and 40°C to clean, dry, structurally sound joints. New concrete must cure for at least 28 days. Use backing rod or release tape to prevent three-sided adhesion. For joints deeper than 10mm use backing rod about 25% larger than the joint width. Use a 2:1 width-to-depth ratio. Internal joints start at 5mm width and depth. External joints start at 10mm width, with maximum joint width 30mm and maximum depth 15mm. Use Adheseal Primer 50A on non-porous substrates and Everflex Supaprime on porous substrates where priming is required. Push the bead ahead of a 45-degree nozzle and tool within about 15 minutes before skin formation.
Limitations and Safety Info  
Do not use in totally confined spaces or as an aquarium sealant. Do not use for structural glazing, mirror bonding or composite-panel bonding. Do not install in underwater applications such as swimming pools. Once fully cured, the product is rated for below-waterline applications. Do not use on horizontal walkways or trafficable joints. Do not use on polycarbonate. Copper and brass may discolour. Do not paint cured N40. Stain-test natural stone before use. Do not expose curing sealant to cleaning agents or solvents that may affect or discolour it.
Suitable Substrates  
  • Glazed and unglazed ceramic tile, porcelain and enamel.
  • Glass, aluminium, zincalume, Colourbond and galvanised metal.
  • Timber, fibreglass and laminated kitchen benches.
  • PVC and other compatible common building surfaces.

Adheseal N40 Silicone Sealant Physical Properties

Adheseal N40 Silicone Sealant Physical Properties
Property Value
Curing System Oxime
Density (Specific Gravity) 1.03 g/cm3 (Translucent)
Shore A Hardness 20
Elongation 300%
Application Temperature +5°C to +35°C
Storage Temperature 10°C to 35°C
Temperature Resistance -50°C to +150°C
Fire Performance AS/NZS 1530.3-1999 Smoke Developed Index of 0-1
Movement Capability ±30%
Elastic Recovery >90%
VOC Content 43 gm/lt
Shelf Life 18-24 months in original packaging
Clean Up White spirit or turpentine
Skin Time Approximately 15-20 minutes
Full Cure 2mm per day at 25°C & 50% humidity
Form Viscous Liquid
Odour Faint odour
Solubility in Water Immiscible in water
Specific Gravity ~1.05 Kg/L
Pour Point/Range > 0°C
Storage Conditions 10ºC and 35ºC

Adheseal N40 Silicone Sealant - Use Cases

Here are some common examples on where Adheseal N40 Silicone Sealant used by our customers.

Construction

Fire-Rated Internal Sealing

General construction or shopfitting where a flexible seal must also meet fire safety and environmental compliance.

Achieves fire safety compliance with a very low smoke developed index, while providing a flexible, low VOC seal.

  • AS/NZS 1530.3
  • Smoke Developed Index 0-1
  • low VOC 43gm/lt
  • ±30% movement capability

Roofing

Metal Roofing & Cladding

Sealing gaps on metal roofs, flashings, and external cladding exposed to harsh weather conditions.

Provides strong adhesion to common roofing metals like Zincalume and Colourbond, maintaining flexibility through temperature extremes.

  • Adhesion to Zincalume, Colourbond
  • Temperature resistance -50°C to +150°C
  • Movement capability ±30%
  • Will not corrode galvanised steel

Caulking

All-Purpose Site Sealing

General sealing tasks across diverse interior and exterior building materials on a construction site.

Its broad substrate compatibility and neutral curing formula make it a reliable, versatile choice for many common sealing jobs.

  • Compatible with most building materials
  • Adhesion to glass, PVC, timber
  • Neutral (oxime) curing system
  • Low VOC (43gm/lt)

Roofing

External Roofing & Cladding Seal

Sealing perimeter joints and penetrations on Zincalume, Colourbond, or galvanised steel roofing and cladding.

Offers strong, non-corrosive adhesion to metals and maintains flexibility across extreme Australian temperatures, resisting UV degradation.

  • Zincalume adhesion
  • Colourbond adhesion
  • -50°C to +150°C
  • will not corrode galvanised

Commercial Kitchens

Food Prep Area Sealing

Sealing joints in commercial kitchens, shower rooms, or other wet areas requiring hygiene.

Its anti-fungal properties and food-safe nature prevent mould growth, ensuring hygienic conditions in sensitive environments.

  • Anti-fungal (fungicide added)
  • Safe for food preparation areas
  • Fire Tested AS/NZS 1530.3
  • Resists mould in hot, humid environments

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