Spray Foam Insulation

THERMADEK 40 LK Spray foam system

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Product Description

THERMADEK 40 LK is an HCFC & CFC FREE two component, 1:1 ratio, rigid foam system which when processed through suitable spray machinery ( Graco, Gusmer, Glas-Craft ) will produce a rigid foam of approximate density 40kg/m³ with exceptionally good compressive strength and a very smooth surface. The system complies with British Standard Numbers 5241 and 7021 for external roof insulation and weatherproofing.

Uses

THERMADEK 40 LK is used for insulation in:

• External roofing – pitched and flat.
• External buildings and cold stores.
• External oil and chemical storage tanks.

THERMADEK 40 LK should not be used on substrates below 10oC. When used externally the foam must be protected from ultra-violet radiation and atmospheric degradation by a suitable elastomeric coating, e.g. ISOTHANE EM.

Equipment

THERMADEK 40 LK 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 40-60oC (variable). Consult Isothane’s technical staff for a specific recommendation.

Recommended machine settings

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.
• The requirements of any relevant Agrément Certificates or British Standards should be followed.
• 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

THERMADEK 40 LK is a two component, modified polyurethane rigid foam which, sprayed through suitable foam machinery, gives a product of nominal density 40 kg/m³.

Storage, Handling and Personal Protection

Shelf Life 12 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.