Foster® Sealfas® 30-36 HF™ Coating

• Sealfas® 30-36 HF™ Coating provides a protective finish for insulation on air conditioning ducts and cold water piping when applied in 2 coats with reinforcing fabric embedded between coats.
• When relative humidity exceeds 75% for continuous periods, or where the insulated piping or equipment contains chilled water, brine or refrigerant, additional vapor barrier protection is suggested.
• Sealfas® 30-36 HF™ Coating is compatible with polystyrene and polyurethane foam insulations.
• It may be applied to the joint or edges of fibrous duct liner insulations to seal and prevent air erosion.
• Sealfas® 30-36 HF™ Coating meets the requirements of Military Specification MIL-DTL-3316D Class 1, Grade A and is listed on the QPD.
• Sealfas® 30-36 HF™ Coating is approved by the U.S. Coast Guard under 164.112/172/0 (SOLAS/IMO approval) superseding 164.012.
• Sealfas® 30-36 HF™ meets the requirements of:
  • MAS Certified Green®
  • California Dept. of Public Health Standard Method v1.2
  • VOC Emissions and Content requirements to contribute to LEED v4 EQ Credit: Low Emitting Materials – Paints and Coatings
  • Collaborative for High Performance Schools EQ 7.1
• Sealfas® 30-36 HF™ Coating meets NFPA 90A and 90B 25/50 requirements.

Material Preparation

• Do not thin.
• Apply only to clean, dry, oil-free surfaces.
• Keep container closed when not in use.

Application 

1. Apply a tack coat at 60 – 70 sq. ft. per gal. (1.5 – 1.7 m2 /l).
2. Immediately embed the selected lagging fabric into the wet coating. Smooth to avoid wrinkles and overlap seams by at least 2 inches (5 cm).
3. Immediately apply a finish coat at 60 – 70 sq. ft. per gal. (1.5 – 1.7 m2 /l). The dry film thickness of this application will vary with the fabric selected.
4. For air conditioning ducts, increase the coverage rate to 40 – 50 sq. ft. per gal. (1.0 – 1.2 m2 /l) for each coat.

Brush

• Use clean paint brushes (suitable for water-based paints).
• Apply with full brush and spread out evenly.

Spray

• Sealfas® Coating may be airless spray applied.
• Average viscosity range: 70,000 – 90,000 cps.
• Corrosion resistant pumps and fittings are suggested.
• At a minimum we suggest the following airless spray equipment or suitable alternative package:
  • Pump Graco Checkmate pump, 40:1 on 100cc lower, NXT2200 motor mounted on ram plate, Graco S20C – 5 gallon cart mounted ram
  • Fluid Hose High pressure capable of 4,000 PSI. 1⁄2” inch up to 50 feet. 3/4 inch over 50 feet. Use 8’ x 1/2” I.D. hose for coupling to the gun. A higher ratio pump set-up will allow for longer hose runs up to 150’
  • Gun Graco mastic or textured coating spray guns with Tip Sizes 521 to 527 Reverse-A-Clean tips
  • There are many configurations of airless spray equipment that may be used and we suggest contacting an airless spray equipment supplier to put together a complete package Most manufacturers of mastic spray equipment maintain nearby service facilities to aid in the selection and any technical problems that arise with their equipment.
• Electric airless spray units such as a Graco Ultramax 795 or 1095 sprayer may also be used, however, due to the body of the coating they may not be capable of completely emptying a pail while spraying.
• A minimum volume in the pail may need to be maintained.

Top Coating 

• If it is to be top coated with anything other than an alkyd enamel conforming to DOD-E-24607 as specified in MIL-DTL-3316D, the user must confirm by his/her own tests that the products are compatible and that the final results are satisfactory.

Use clean, fresh water for cleaning brushes and equipment before product dries. Dry product may be removed with hot, soapy water or strong solvents such as chlorinated solvent (non-flammable) or mineral spirits (flammable).

• Store and apply between 40°F (4°C) and 100°F (38°C), protect from freezing until dry.
• Always test foil and paper facings for acceptable adhesion before using.
• Sealfas® 30-36 HF™ Coating is also available in a low viscosity version as a special order.