Product Data Sheet Show all documents

Davco® N Silicone

1-component neutral cure sanitary silicone sealant

Davco® N Silicone is a one-component, neutral curing, low odour silicone sealant with excellent adhesion and is suitable for elastic joint sealing. Davco® N Silicone is easy to apply and cures with atmospheric moisture to form a high performance tough flexible mould resistant waterproof seal.

▪ Neutral cure ▪ Excellent adhesion to most common construction materials such as: glass, enamel, ceramics, tiles, most metal*, most plastic, rubber, concrete and grouts ▪ Non-sag ▪ Easy tooling characteristics ▪ Mould resistance ▪ Fast curing ▪ Movement capability ±50% ▪ High temperature resistance (-40°c to +150°c) *Not for use on all metal and natural stone substrates i.e. copper. -See Important Considerations below prior to use.
Product Data Sheet Show all documents

Usage

▪ Kitchen ▪ Bathrooms ▪ Showers ▪ Tiled areas ▪ Benchtops ▪ Basins ▪ Baths ▪ Toilets ▪ Around Splashbacks ▪ Around plumbing fixtures and penetrations ▪ General interior & exterior sealing around the home  

Advantages

▪ Neutral cure ▪ Excellent adhesion to most common construction materials such as: glass, enamel, ceramics, tiles, most metal*, most plastic, rubber, concrete and grouts ▪ Non-sag ▪ Easy tooling characteristics ▪ Mould resistance ▪ Fast curing ▪ Movement capability ±50% ▪ High temperature resistance (-40°c to +150°c) *Not for use on all metal and natural stone substrates i.e. copper. -See Important Considerations below prior to use.

Packaging

300ml cartridges

Colour

White, Black, Gunmetal, Light Grey, Mocha

Product Details

Product Information

Composition

Neutral cure silicone

Shelf life

12 months from date of production if stored in undamaged and unopened original sealed containers, and if the storage conditions are met.

Storage conditions

Store in dry conditions and protected from direct sunlight at temperatures between +5°C and +25°C.

Density

~1.4 kg/l

(ISO 1183-1)
Technical Information

Shore A hardness

~47 (after 28 days)

(ISO 868)

Tensile strength

~ 0.6 MPa

(ISO 37)

Secant tensile modulus

~ 0.50 N/mm2 at 100% elongation (23 oC)

(ISO 8339)

Movement capability

±50%

(ASTM C719)

Service temperature

 -40 °C to +150 °C

Joint design

The joint dimensions must be designed to suit the movement capability of the sealant. For joint widths more than 10 mm and less than 20 mm, the minimum joint depth is 10 mm. For larger joints, contact Sika Technical Services for additional information.

Elongation at break

~ 750% 

(ISO 37)

 

Application

Application Information

Ambient air temperature

 +5 °C min / +40 °C max

Substrate temperature

 +5 °C min / +40 °C max. Minimum +3 °C above dew point temperature

Curing rate

 Approximately 3~4mm per 24 hours @ 23 °C / 50% r.h.

Skinning time

~ 20 minutes (23 °C / 50% r.h.)
Application steps

SUBSTRATE PREPARATION

The substrate must be clean, dry, sound and free from oils, grease, dust, cement laitance and loose or friable particles. For optimum adhesion, joint durability and critical, high performance applications such as joints on multi-storey buildings, highly stressed joints, extreme weather exposure or water immersion/exposure. The following priming and/or pre-treatment procedures must be followed:

 

Non-porous substrates

Aluminium, anodised aluminium, stainless steel, galvanised steel, powder coated metals or glazed tiles have to be cleaned and pre-treated using Sika® Aktivator-205, wiped on with a clean towel. Before sealing, allow a flash-off time of > 15 minutes (< 6 hours). Other metals, such as copper, brass and titanium-zinc, also have to be cleaned and pre-treated using Sika® Aktivator-205,wiped on with a clean towel. After the
necessary flash-off time, use a brush to apply Sika® Primer-3 N and allow a further flash-off time of > 30 minutes (< 8 hours) before sealing the joints. PVC has to be cleaned and pre-treated using Sika® Primer-215 applied with a brush. Before sealing, allow a flash-off time of > 30 minutes (< 8 hours).

 

Porous substrates

Concrete, aerated concrete and cement based renders, mortars and bricks shall be primed using Sika® Primer-3 N applied with a brush. Before sealing, allow a flash-off time of > 30 minutes (< 8 hours).

Adhesion tests on project specific substrates must be performed and procedures agreed with all parties before full project application. Contact Sika Technical Services for additional information.

Note: Primers and activators are adhesion promoters and not an alternative to improve poor preparation/cleaning of the joint surface. Primers also improve the long term adhesion performance of the sealed

CLEANING OF EQUIPMENT

Clean all tools and application equipment with Sika® Remover-208 immediately after use. Hardened material can only be removed mechanically. For cleaning skin, use Sika® Cleaner 350H.

Colours

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