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Spray Foam Insulation


Introduction
Frequently Asked   Questions
 Technical Data
 Sheets
AGRISPRAY OS
DURATHERM OS
Bridge Infill Case Study
PIRTHANE ‘‘O’’
Soffit Insulation Case
   Study
TECHNITHERM
Wall Tie Replacement -
   Insulation Case Study
THERMADEK 40 LK
Digester Insulation Case
   Study

Thermadek Winter
   Grade

Winter Application
   Case Study 1
Winter Application
   Case Study 2

DURATHERM OS Spray foam system

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Product Description

DURATHERM OS is an HCFC AND CFC FREE two component, 1:1 ratio, rigid foam system which when processed through suitable spray machinery ( Gusmer, Glas-Craft/Probler etc ) will produce a rigid foam of approximate density 35kg/m3 with exceptionally good compressive strength. Service Temp range -15oC to 70oC. When tested to BS476 part 7 the foam achieves a Class 1 surface spread of flame.

Uses

DURATHERM OS is used for insulation in:

  • New build
  • Loft conversions
  • Commercial buildings
  • Ocean going yachts / canal barges

DURATHERM OS can be used to upgrade the thermal performance of roofs, floors or walls of any property, to meet current building regulations.

Equipment

DURATHERM OS can be processed through all standard foam spray machines. The machine should be capable of maintaining the mix ratio at ±2% accuracy and controlling the component temperatures at 40-50oC (variable).

Recommended machine settings

Block Temperature

Minimum, operating 100-120°F / 40-50°C
Hose Temperature Minimum, operating 100°F / 40°C
Chemical Pressures Minimum, operating 500 psi,
 

not greater than 200 psi
difference iso / res

Spray Techniques

The guidelines in Isothane Limited’s standard specification should be followed but the general requirements are as follows.

  • The substrate should be clean, dry and free of dirt, grease, oil and loose particles.
  • In certain cases primer may be necessary to maximise adhesion.
  • Climatic conditions must be suitable for spraying with regard to humidity and wind velocities.
  • The foam should be built up in passes of not less than 15mm and not more than 10 minutes should elapse between passes.
  • The requirements of any relevant Agrément Certificates or British Standards should be followed.

Physical Properties

DURATHERM OS is a two component, modified polyurethane rigid foam which, sprayed through suitable foam machinery, gives a product of nominal density 35 kg/m³.

Laboratory test results (typical):-
 
Cream time
3-5
seconds
Tack free time
10-16
seconds
Rise time
20-30
seconds
Free rise density
26-30
kg/m³

Storage, Handling and Personal Protection

Shelf Life 6 months. The recommendations in our Safety Data Sheet for this product must be followed at all times. More general information is included in our publication “A Guide to the Safe Handling of Polyurethane Chemicals” and in the following Technical Data Sheets which are available on request:-

  • Fire safety when Storing, Handling and Installing Polyurethane Foam.
  • Decontamination of Isocyanates using Isothane Decontaminant.
Typical Properties Of
DURATHERM OS Foam Core
Value Test Method
Core density 35 - 40 kg/m³ BS4370
Compressive strength - Parallel to rise 220 kpa BS4370
Close Cell Content 88 % min. ASTM D2856
Thermal Conductivity -10.5°C Mean 0.0221 W/mK BS EN 12 667
Water Vapour    
Permeability - 80 - 100mm, 38°C, 88% RH 7.16 ng/Pa.sm BS4370
Dimensional Stability - 1 day @ -15°C - 0.53 % vol. BS4370
  + 0.75 % vol. BS4370
  + 0.93 % vol. BS4370
Ozone Depletion Potential ZERO  

Burning Characteristics – These are laboratory scale tests and bear no relation to the performance of the material in a real fire situation. Care must be exercised in the end use to satisfy the demands of the Fire Authorities, and moral obligations to the safety of persons and property.
Extent of burn 3.6 mm BS4735-74
Surface spread of flame Class 1 BS476 pt. 7-97