This site uses cookies to store information on your computer. Learn more about these cookies, and how to opt out of them. Find out more

NBS Source

ASBESTOSEAL 20 – Asbestos Roof Coating System

Verified by manufacturer 6 months ago

Liquasil Ltd Third party certifications:
  • BBA Agrément Certificate

    BBA Agrément Certificate

    Certificate type

Three-component asbestos roof coating system.

Jump to:
+44 (0)1217 095352 www.liquasil.com

Application

Designed specifically for commercial and industrial premises for asbestos roof and cladding refurbishment.


  1. Change defective roof lights if present
  2. Thoroughly clean roof surface, removing moss & lichen
  3. Prime all metal fixings with SWT Primer
  4. OPTION: prime roof sheets with SWT Primer to arrest surface delamination (can be done whilst roof is damp)
  5. Apply Liquasil Non-Sag Sealer to previously primed metal fixings (surfaces must be bone dry).
  6. OPTION: if water ingress is suspected at mid-laps, seal with Non-Sag Sealer
  7. Apply Asbestoseal 20 at wet film weight of 300 microns directly to bone dry asbestos roof sheets


  • Application of SWT Primer to fixings - use sacrificial brushes
  • Application of SWT Primer to roof sheets (if required), use sacrificial rollers and brushes
  • Application of Asbestoseal 20 - use brushes, rollers or airless spray


Beware of Overspray!

All sprayed products can be carried by the wind and contaminate vehicles. Consider specifying barrier protection when airless spraying is being employed.

Description

Three-component asbestos roof coating system.


Features and benefits:

  • Designed to permanently fix problematic asbestos roofs.
  • Cost effective.
  • Can be applied via airless spray, roller or brush.
  • Forms a smooth, even and patch free finish.
  • Insoluble in water.
  • 20 year manufacturer's product guarantee when installed by a Liquasil Approved Installer.
  • Steam cleaning using DOFF 150°C steam (Not HSE Approved). All waste must be treated as being contaminated with asbestos and must be bagged and then disposed of using a licensed disposal facility, with consignment note retained for the health and safety file. Waste water must be filtered to 5 μm to ensure that no waste water enters the mains drainage system. 


Approvals:

- SWT Corrosion Primer:

  • Marine-grade primer
  • Surface and wet tolerant

- ASBESTOSEAL 20:

  • BBA certified.
  • Manufacturer recommends the use of Xylene for cleaning spraying lines after the spray application of the ASBESTOSEAL 20 component.
  • Brushes and rollers are sacrificial.


- Optional Process

SWT Primer, is typically used for preventing rust break-through on metal fixings. However, it can also be used to prime the asbestos cement sheets and at the same time, arrest early delamination of the roof sheets.


The resultant aesthetic finish will be considerably enhanced, which might be important to specifiers in certain circumstances.

General information

Color

Other

Finish

Semi-gloss

Material

Silicone

Shape

Formless

Size

Drums.

WarrantyDescription

Liquasil provides a 20 year product warranty when the Asbestoseal is installed by a Liquasil Approved Installer to industrial / commercial premises.

20 year

20-year product warranty.

Uniclass

Ss_40_90_60_85 Special coating systemsPrimary

CAWS

M60/175 Protective coating

M60/18 Special coating

M60/195 Special coating

Product range

Pitched Roof Waterproofing

Specification data - Special coating systems

Preparation

Thoroughly clean surfaces and allow to dry.

In all cases, the asbestos cement substrate will require cleaning. Jet wash lances should not be used, as they can destroy the asbestos cement substrate.


One of the following methods should be employed:


  • Closed Box Pressure wash (HSE Approved Method).
  • Steam cleaning using DOFF 150°C steam (Not HSE Approved).


All waste must be treated as being contaminated with asbestos and must be double bagged and then disposed of using a licensed disposal facility, with consignment note retained for the health and safety file. Waste water must be filtered to 5 μm to ensure that no waste water enters the mains drainage system.


Additional reference: see HSE guidance note a12, “Cleaning weathered asbestos cement (AC) roofing and cladding” http://www.hse.gov.uk/pubns/guidance/a12.pdf.


All surfaces must be clean and dry prior to application. Please note that when using airless spray, an initial mist coat of ASBESTOSEAL 20, or use of Liquasil Asbestos Cement Stabilising Solution is strongly recommended in order to achieve a uniform finish on porous substrates. 

Consult manufacturer's literature for further details on spray application guidelines.

Initial coats

SWT Corrosion Primer.

Two-part epoxy comprising the primer (part A) and the hardener (part B). Rust and wet tolerant for application to all metal fixings such as hook bolts to prevent rust from breaking through the coating.


Technical characteristics:


  • Colour: Grey.
  • Solids content: 100%.
  • Coverage: Up to 6 m²/kg.
  • Drying time: 6–24 hours.
  • Weight: 1 kg/L.
  • Flash point: >100°C.
  • VOC content: 0 g.
  • Finish: Semi-gloss.
  • Application temperature: -20°C to 40°C.

Undercoats

Non-Sag Sealer.

A specially formulated silicone that is brush applied to all primed fixings to re-seal failed rubber seals, and for instantly sealing small holes and cracks in roof sheets. Roofs with a shallow pitch will especially benefit from overlapping joints being sealed.

Finishing coats

ASBESTOSEAL 20.

The coating that is applied to the entire roof to form a complete membrane that will protect the asbestos cement roof sheets from further deterioration. If aesthetics are important, please specify two coats pf Asbestoseal 20.


Technical characteristics:



  • Composition: Viscous liquid.
  • Odour: Mild/ faint.
  • Melting point: <-60°C.
  • Initial boiling point and range: 185–255°C (at 1013 hPa).
  • Flash point (closed cup): 67°C.
  • Vapour pressure: 0.035 kPa (at 20°C).
  • Relative density: ~1 (at 20°C).
  • Viscosity: ≤50 P (at 20°C).
  • Solids content: 85%.
  • Recommended film thickness: 300–350 μm.
  • Coverage: Up to 2.5–3.2 m²/L (at 300 μm: 2.6 m²/L; at 250 μm: 3.2 m²/L).
  • Drying time: Should be rain free for 2–4 hours. Thoroughly dry after 8 hours.
  • Weight: 1 kg/L.
  • VOC content: 45 g/L.
  • Application temperature: -5°C to 60°C.

ASBESTOSEAL SF.

Can be specified in cases where solvents cannot be used.

Asbestoseal Solvent Free (SF) can be applied by brush and roller only.

Colour

Grey.

RAL.

Insert RAL colour code; minimum order applies, consult manufacturer for details.

Capacity

Tin.

20 L.

Environmental information

Contains Red List materials

No

Country of material origin

United Kingdom

Country of product manufacture

United Kingdom

Recyclability

Typically not recyclable because it will be applied to asbestos cement products which are typically sent for specialist disposal at the end of their life.

Recycled content

0 %

Literature

Asbestos Roof Coating System - BBA Approved Asbestoseal

Asbestos Roof Coating System - BBA Approved Asbestoseal

Third party certifications

BBA Agrément Certificate

BBA Agrément Certificate

ASBESTOSEAL 20, Liquasil Asbestos Roof Coating System, Product Sheet 1 - Certificate: 15/5266

Similar products from Liquasil Ltd

FlexLap – Cut Edge Corrosion Treatment

FlexLap – Cut Edge Corrosion Treatment

MetalSeal 20

MetalSeal 20