Paint JOTUN Fireproof Coating with DP-340TK SFRM Sprayer Machine

WHAT IS JOTUN Steel Master Fireproof Coating?

Steel Master is a one-component waterborne acrylic thin film intumescent coating. It was independently tested and approved for fire protection of structural steel exposed to cellulosic fire for up to 180 minutes. It can be used as a mid-coat or finish coat in atmospheric environments. Suitable on approved primers on carbon steel substrates.

Why choose DP-340TK SFRM Sprayer Machine Paint JOTUN Fireproof Coating?

Fireproof coating often has high viscosity or contains the characteristics of particles, ordinary spraying machine in the treatment of this coating will be challenging to work normally DP-340TK SFRM Sprayer Engineered unique piston pump technology, which means it can easily handle repair mortars with small to medium-sized aggregate, and suitable for a variety of fire retardant coatings.

How to spray fire retardant paint?

Spraying preparation

1. Connect the machine to the high-pressure tube and pelvic cavity and replace the appropriate nozzle.
2. Start the machine and test it with water to ensure it works properly.
3. Insert the suction tube into the bucket of fireproof paint, turn on the backflow switch so that the water in the machine backflow to the waste bucket.
4. Adjust the switch to spray mode to spray the waste barrel, spray the remaining water in the high-pressure tube, turn off the switch when the coating starts to flow out and the preparation is completed.
5. After finishing the spraying work, it is necessary to clean immediately and put the suction tube into the water to start the machine until the water flows out.
6. If the machine is stored for a long time, you need to inhale some anti-rust oil in the pump body.

Product mixing

This product is a high viscosity product. It is possible that this may be affected when stored. It should be mixed with an air-powered mechanical paint mixing tool that is clean and fit for purpose. You can choose M209 heavy-duty 1600w paint mixer tool to do this work. It has a variety of modes that are suitable for paints of different viscosity.

Mechanically mix for about 5 minutes to ensure that the product is mixed to a uniform consistency and fully incorporate all ingredients into a homogenous mixture. Slow-speed mixers or mechanical mixers are highly recommended to ensure no aeration or air bubbles are formed during the mixing process. Manual mixing is not recommended.

Process sequence

Surface preparation and coating should usually be commenced only after all welding, degreasing, removal of sharp edges, weld spatter, and treatment of welds is complete. All hot work must be completed before coating commences.

Metal finishing

Surface laminations and sharp edges should be removed, sharp edges must be rounded off smooth before

priming. Weld spatter, or flux, dust, and spent abrasive and all contamination must also be removed before

primer application. Ensure substrate is clean and dry before painting.

The following restrictions must be observed:

• Only apply the coating when the substrate temperature is at least 3°C above the dew point
• Do not apply the coating if the substrate is wet or likely to become wet
• Do not apply the coating if the weather is clearly deteriorating or unfavourable for application or curing
• Do not apply the coating in high wind conditions

Recommended film thickness per coat

Typical dry film thickness per coat: 207-690 microns

Typical wet film thickness per coat: 300-1000 microns

To achieve the required fire rating, all steel sections must be coated with the correct film thickness. Please refer to the current loading tables.

Note: The maximum and typical film thickness are only achievable by airless spray.

Drying and Curing time

Drying and curing times are determined under controlled temperatures and relative humidity below 85% and within the DFT range of the product.

Topcoating:

The minimum overcoating interval of this product with approved topcoats is 48 hours. Before applying the topcoat, the applicator must ensure that this product’s specified dry film thickness has been achieved.

Surface (touch) dry: The stage of drying when slight pressure with a finger does not leave an imprint or reveal tackiness. Dry sand sprinkled on the surface can be brushed off without sticking to or causing damage to the surface.

Dried to handle: Minimum time before the coated objects can be handled without physical damage.

Dried to overcoat, minimum: The shortest time allowed before the next coat can be applied.

Dried to overcoat, maximum, atmospheric: The longest time allowed before the next coat can be applied without surface preparation.

Maximum overcoating intervals for atmospheric exposure

The drying time of the intumescent coating system will increase as the DFT of the total system is increasing, hence for coating systems higher than 1000 microns DFT, the minimum overcoating interval of any subsequent coat other than itself is 48 hours at 23 ºC.

The subesequent coat will adhere to the subtrate when applied on top of this product within the given time frame. However, during this period, the surface coated with this product should not be exposed to humidity above 85 %. Direct exposure to water without an approved topcoat will have a negative effect on the performance of the coating system.

Quality assurance

The following information is the minimum recommended. The specification may have additional requirements.

– Confirm all welding and other metal work, whether internal or external to the tank, has been completed before commencing pre-treatment and surface preparation of the substrate

– Confirm installed ventilation is balanced and has the capacity to deliver and maintain the RAQ

– Confirm the required surface preparation standard has been achieved and is held prior to coating application

– Confirm that the climatic conditions are within recommendation in the AG and held during the application

– Confirm the required number of stripe coats have been applied

– Confirm each coat meets the DFT requirements of the specification

– Confirm the coating has not been adversely affected by rain or any other agency during curing

– Observe adequate coverage has been achieved on corners, crevices, edges, and surfaces where the spray gun cannot be positioned so that its spray impinges on the surface at 90°

– Observe the coating is free from defects, discontinuities, insects, spent abrasive media, and other contamination

– Observe the coating is free from misses, sags, runs, wrinkles, fat edges, mud blistering, blistering, evident pinholes, excessive dry spray, heavy brush marks, and excessive film build

– Observe the uniformity and colour are satisfactory

All noted defects should be fully repaired to conform to the coating specification.