PVC and EPDM Acrylic

PVC and EPDM Acrylic is a Kool Coats restoration system for existing PVC and EPDM single-ply roofs in the USA market. Its coating chemistry is acrylic. The assembly is made of membrane-specific preparation, a TS-400 KwikShot Rubber base and a TS-505 TopShot EDGE acrylic finish.

The rubber layer seals repaired seams, flashings and surface defects, and the reflective acrylic finish protects the exposed roof. The system is one of the acrylic coatings for low-slope roofs in the Kool Coats range.

PVC and EPDM take different primer instructions, because the two membranes are not interchangeable substrates. After cleaning and repairs, the primer for the identified single-ply membrane is applied.

• P-313 is an EPDM bleed-block primer for acrylic or silicone coatings.
• RP-105 Rinseable EPDM Cleaner is the Kool Coats cleaner named for EPDM.
• P-301 Multipurpose Primer bonds to TPO, PVC and metal and is used under silicone or acrylic systems. It is not for use with EPDM.

In acrylic systems P-301 enhances ponding water resistance. It is 51% solids by volume, builds mils, smooths uneven surfaces, encapsulates surface rust and fills micro-cracks. Spray application uses a .017 to .031 tip at 2500 to 3000 psi through 3/8 in hose reduced to 1/4 in at the gun, for a viscosity of 90 KU.

After priming, the specified KwikShot rubber layer is built, then the selected TopShot acrylic coating goes on. TS-400 is a water-based, non-silicone liquid rubber that bonds to properly prepared roof surfaces and ties into Kool Coats acrylic and urethane systems.

It is applied by brush with a nylon or polyester bristle, by roller with a 3/8 to 1/2 in nap nylon or polyester cover, or by airless sprayer.

• Minimum airless sprayer: 0.015 tip orifice, 0.34 GPM flow, 3,000 psi maximum working pressure, 1/4 in hose
• Maximum airless sprayer: 0.065 tip orifice, 4.0 GPM flow, 4,000 psi maximum working pressure, 3/8 in hose reduced to 1/4 in

A test patch is made to prove adhesion. Application temperature is 50 to 90 degrees F, and it is not applied if the temperature is expected to drop below 32 degrees F within 24 hours.

TS-505 TopShot EDGE is an elastomeric acrylic coating made with high solids content and enhanced elongation. Its formulation has a reduced filler content. It is used for 15-plus year systems and for commercial restorations that call for a high-build, one-pass coating.

• Solids by volume: 52%
• Solids by weight: 62%
• Tensile strength: 300 psi
• Elongation: 360%, nominal
• Tear resistance: 105 lbs/in
• Hardness: 65 Shore A
• Weight per gallon: 10.8 lbs
• Volatile organic content: under 50 g/L
• Service temperature of the cured film: 15 to 180 degrees F

The rubber base and the acrylic finish each have their own cured thickness. Wet-film thickness is measured while the coats go on, and dry-film thickness is measured after cure. The TS-400 rate is 1 gallon per 100 sq ft at 30 mils wet film thickness, and the rubber is rated 100% waterproofing at 30 mils dry film thickness with elongation up to 1200%.

With TS-505 TopShot EDGE, Kool Coats offers a 10-20 year Material Warranty, and a 10-20 year Labor and Material Warranty is available for a fee. The warranty is made solely to the original purchaser and is non-transferable, and a valid proof of purchase is needed for warranty service.

TS-505 is applied by standard airless spray equipment capable of 2000 to 3000 psi or by a medium-nap roller, with a brush for small touch-up work. The application temperature is 50 to 100 degrees F. It is not applied below 40 degrees F or when rain is expected within four hours. The coating can dry in 1 to 4 hours and cures in 24 to 48 hours at 77 degrees F and 50% humidity. Thinning is not permitted.

The TS-400 rubber is rated at 30 mils dry film thickness and 1200% elongation, with membrane strength of up to 1,540 psi. Roof gaps and cracks wider than 1/8 in are filled with the caulking grade, and the rubber is then sprayed over seams and details before a reflective acrylic top coat.

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.