Modified Bitumen RubberThane

Modified Bitumen RubberThane is a Kool Coats coating system for restoring sound modified-bitumen roofs in the USA market. A flexible TS-400 KwikShot Rubber base is covered with a U-701 Aliphatic Urethane Topcoat.

The rubber accommodates movement at the roof surface, and the abrasion-resistant urethane finish is a protective topcoat where maintenance activity and demanding exposure are expected. Traffic routes are assessed separately from the general coating area. The system is one of the liquid coatings for modified bitumen roofs in the Kool Coats range.

The cap sheet is repaired and prepared. The specified KwikShot rubber base is built up, and the finish is U-701 Aliphatic Urethane Topcoat. The system has its own adhesion, curing and recoating requirements between the rubber and urethane layers.

• Existing roof: modified bitumen cap sheet
• Base: TS-400 KwikShot Rubber
• Finish: U-701 Aliphatic Urethane Topcoat

The base is KwikShot Rubber with 1200% elongation. The urethane topcoat is listed for Class 4 hail defense, and the system is also listed as non-yellowing, UV stable, ponding rated, chemical resistant and re-coatable.

TS-400 is sold as a fast, fabric-free seam prep for commercial acrylic and urethane roof systems. Spray application cuts down fabric work, hand coating and slow detail steps. It bonds to properly prepared surfaces and ties into Kool Coats acrylic and urethane systems.

The coating is 100% waterproofing at 30 mils dry film thickness, with up to 1200% elongation for seams that move. It is applied with airless equipment, brush or roller. Minimum airless sprayer requirements are a 0.015 tip orifice and a 0.34 GPM flow rate. The maximum working pressure is 3,000 psi, and the hose is 1/4 in.

U-701 coverage is approximately 4.1 to 8.2 lb per 100 sq ft, applied in one or two coats. The figure is based on roller application over a smooth surface under optimal conditions, and surface porosity, temperature and application method affect material consumption. Pull-off adhesion is over 65 psi.

• Tensile strength: over 1,450 psi
• Impact resistance: 14.5 ft-lbs
• Wear resistance: 0.39 mils
• Water vapor permeability: about 0.68 perms
• Solar reflectance index: 113

The cured topcoat holds its mechanical properties between -22 and 176 degrees F and resists frost from -40 to 194 degrees F. Layers are applied 3 to 6 hours apart, and not more than 8. It is rain-resistant after 4 hours, takes light pedestrian traffic after 18 to 24 hours, and reaches final cure at 10 days. Pails are stored dry and cool for up to 12 months and protected from freezing.

Kool Coats offers a 10-20 year Material Warranty on TS-400, and a 10-20 year Labor and Material Warranty is available for a fee. The warranty is solely to the original purchaser. Maintenance guidance is a roof inspection at least twice a year, and straight after severe weather and extraordinary maintenance on roof-mounted equipment.