Fosroc Nitoseal PU 40
Fosroc Nitoseal PU 40
📋 Product specifications are for reference only.
All product details should refer to the official manufacturer documents. For official product data sheets or technical enquiries, please contact us via WhatsApp.
Nitoseal PU40 is a Fosroc single-component low-modulus polyurethane elastomeric building sealant, gun-applied. Suitable for sealing joints in concrete, brickwork, blockwork, precast panels, stone cladding, perimeter sealing around doors and windows, and non-trafficked floor joints. Adheres to most common building materials, primerless for most applications. UV resistant, fast curing, smooth non-slumping paste. Compliant with ISO 11600 (per manufacturer). Available in a range of colours.
Product Overview
Nitoseal PU40 is a one-part, low-modulus gun-grade elastomeric sealant based on polyurethane technology. Smooth, non-slumping paste that is easy to apply. Provides good movement accommodation for various building joints. Suitable for joints within a specified width range; moving joints should be designed to an optimum width-to-depth ratio to minimise stress on the sealant.
Features
- Broad adhesion — bonds to most common building materials
- Single component, fast cure — no mixing required, rapid cure rate
- Easy to apply — smooth paste, gun-applied
- UV resistant — suitable for long-term exterior exposure
- Primerless for most applications — generally no primer needed
- Colour range — available in multiple colours
- International standards compliant — ISO 11600, ASTM C920 and others (per manufacturer)
Applications
- Concrete structural joint sealing
- Brickwork and blockwork joint sealing
- Precast concrete panel joints
- Stone cladding joints
- Perimeter sealing around doors and windows
- Non-trafficked floor joints
Application Guidelines
- Surface preparation — joint surfaces must be clean, dry and frost-free; remove dirt, laitance, loose material and rust
- Priming — generally not required; for high-movement or intermittently immersed joints, use Fosroc Primer 7 (porous) or Primer 4 (non-porous)
- Backer rod — use polyethylene foam backer rod in expansion joints; use bond breaker tape in contraction joints
- Application — gun sealant firmly into joint and tool flush shortly after application
- Finishing — mask joint edges before sealing for neat finish lines
Packaging
- 600 ml sachets (10 per box)
- 310 ml cartridges (subject to minimum order quantity)
Notes
- Do not apply at low temperatures
- Not suitable for water-immersed conditions (use Nitoseal MS600)
- Not suitable for contact with bituminous materials
- Not suitable for trafficked floor joints (use Nitoseal MS300)
- May stain decorative stone (use Nitoseal MS100 for non-staining)
- Not suitable for contact with solvents, oil or petrol
- Colour change may occur on exterior exposure but does not affect physical properties
- Shelf life: twelve months in original packaging in cool, dry conditions (per manufacturer)
- For detailed application methods, coverage rates and technical parameters, refer to the official product data sheet
FAQ
How does PU40 differ from the MS sealant series?
PU40 is a polyurethane (PU) sealant suited for general building joint sealing, primerless for most applications. The MS series are modified silicone sealants with specific strengths: MS600 for water-immersed conditions, MS300 for trafficked floor joints, MS100 for non-staining applications on stone. Select the appropriate product based on your requirements.
Is a primer required?
Most general applications do not require a primer. However, for high-movement joints or joints intermittently immersed in water, a primer is recommended for reliable adhesion. Use Fosroc Primer 7 for porous substrates and Primer 4 for non-porous substrates.
How much does it cost?
Please contact us via WhatsApp for pricing. Available for pickup at our Mong Kok store or delivery within Hong Kong.
