TPO Acrylic

TPO Acrylic is a Kool Coats restoration system for existing thermoplastic polyolefin (TPO) roofs in the USA market. It uses a compatible primer, a TS-400 KwikShot Rubber base and a TS-505 TopShot EDGE acrylic topcoat. The coating chemistry is acrylic.

The primer connects the coating to the smooth TPO sheet, the rubber seals stressed details, and the acrylic gives the roof a new reflective exposed surface. The system is one of the acrylic roof coatings for flat roofs from Kool Coats.

The TPO is prepared and primed as specified. KwikShot rubber is applied to the required detail and base-coat build, and the selected TopShot acrylic topcoat completes the system. Repaired seams and penetrations are part of the complete assembly.

• Primer: P-301 Multipurpose Primer
• Base and details: TS-400 KwikShot Rubber
• Topcoat: TS-505 TopShot EDGE

Before TS-400 goes on, surfaces are made sound and free of frost, dirt, grease, oil, loose nails and screws, sharp protrusions and other contaminants. Dust and dirt are brushed away or wiped off with a clean, dry cloth. Application is made on a warm, dry surface between 50 and 90 degrees F, with the surface at least 5 degrees F above the dew point and rising. A test patch confirms adhesion.

TS-400 is supplied in tote, drum, 5 gallon and 1 gallon containers and is applied at 1 gallon per 100 sq ft at 30 mils wet film thickness. The rubber is a water-based, non-silicone liquid, and water cleans tools, spills and hands after use.

P-301 is a high-solids primer that bonds to TPO. It is used under silicone or acrylic systems, and in acrylic systems it enhances ponding water resistance. The film is dry to touch in about 1 hour, ready for topcoat after 2 to 4 hours, and fully cured in about 4 hours at 77 degrees F and 50% relative humidity.

• Color: light gray
• Packaging: tote, drum, 5 gallon and 1 gallon
• Storage: two years from date of manufacture, 60 to 90 degrees F, protected from freezing
• Mixing: mechanical, before and during use

TS-505 is an advanced elastomeric acrylic topcoat applied by airless sprayer, medium-nap roller or, for small work, brush. Cleanup of equipment and overspray is done with water. Application tools are cleaned with lukewarm water and soap, followed by a rinse of isopropanol, acetone or Simple Green. Mineral spirits, xylene, toluene and VM&P naphtha solvents are not used.

Its shelf life is 12 months from date of manufacture in unopened containers between 40 and 100 degrees F. Pails come in tote, drum, 5 gallon and 1 gallon sizes.

• Elongation: 360%, nominal
• Tensile strength: 300 psi
• Tear resistance: 105 lbs/in
• Hardness: 65 Shore A
• Solids by volume: 52%
• VOC: under 50 g/L

It was revised in January 2025 and carries the Kool Coats 10-20 year Material Warranty, with a 10-20 year Labor and Material Warranty available for a fee.

KwikShot is a water-based, low-VOC sprayable rubber that forms a flexible waterproof layer. It is rated at 30 mils dry film thickness, with 1200% elongation and membrane strength of up to 1,540 psi. Caulking and trowel grades of KwikShot exist.

1. Inspect and clean the roof, and identify gaps, cracks and areas larger than 1/8 in.
2. Fill the larger gaps with the KwikShot caulking grade.
3. Spray KwikShot across all seams and detail areas.
4. Top coat with a reflective acrylic.

TS-505 is a rubber-modified acrylic made with reduced calcium carbonate, and it is listed with enhanced crack and impact resistance. It comes in white only, in 5 gallon, 55 gallon and 275 gallon sizes.

The acrylic TPO system layers primers, then KwikShot rubber, then a UV-stable acrylic topcoat. The rubber is applied over the primers and absorbs fastener and seam movement. The installation is fabric-free.