Karnak 407 EPDM & SPF Acrylic Base Coat, Light Pink, 5 gal

Karnak 407 EPDM & SPF is a 100% acrylic elastomeric co-polymer emulsion base coat in light pink, supplied in a 5-gallon pail. It is designed for adhesion to EPDM and spray polyurethane foam roofing membranes and systems. Top coat with a Karnak acrylic finish coat such as 505HS Mohave Coat, 501 Elasto-Brite or 529 Renu-White to help extend the life of the existing membrane.

Key Features:

• 100% acrylic base coat: Acrylic elastomeric co-polymer emulsion formulated as a base coating.
• EPDM and SPF adhesion: Specifically designed for adhesion to EPDM and spray polyurethane foam roofing membranes.
• Blister resistance: Technology provides very good adhesion and resistance to blistering on EPDM and SPF systems.
• Pairs with finish coats: Top coat with 505HS Mohave Coat, 501 Elasto-Brite or 529 Renu-White.
• Roller-ready application: Apply with a 3/4 in. to 1-1/4 in. nap roller or soft roof brush.

Specifications Table:

Coverage & How Much You Need:

One unit is a 5-gallon pail of base coat; the sources do not state a coverage rate, so size the job using the manufacturer’s published spread rate for EPDM or SPF substrates.

Fit and Compatibility:

Formulated for suitably cleaned EPDM and SPF (spray polyurethane foam) roofing systems. Must be top coated with a durable acrylic elastomeric finish coat such as Karnak 505HS Mohave Coat, 501 Elasto-Brite, or 529 Renu-White, all sold separately.

Frequently Asked Questions (FAQ):

Q: What is included in one unit?
A: One 5-gallon pail of Karnak 407 EPDM & SPF acrylic base coat in light pink.

Q: What membranes does it bond to?
A: It is designed for adhesion to EPDM and SPF (spray polyurethane foam) roofing membranes and systems.

Q: Does it need a top coat?
A: Yes, apply it to a suitably cleaned roof and top coat with a durable acrylic elastomeric finish coat such as 505HS Mohave Coat, 501 Elasto-Brite or 529 Renu-White.

Q: How do I apply it?
A: Apply with a 3/4 in. to 1-1/4 in. nap roller or a soft roof brush over a suitably cleaned surface.

Q: How much area does a pail cover?
A: Coverage is not stated in the available sources; check Karnak’s technical data for spread rate per gallon on your substrate.

Q: What color is it?
A: The base coat is light pink, which helps confirm coverage before the finish coat goes on.

Expert Verdict Reviewed by the SuperArbor Pro Desk

On aging EPDM or SPF roofs, 407’s purpose-built acrylic chemistry delivers the adhesion and blister resistance a base coat needs before a finish coat. Clean and prep the substrate thoroughly, since coating life depends on surface condition as much as on the coating itself. Always finish with a compatible Karnak acrylic top coat rather than leaving the base coat exposed.

Apply coating systems per the manufacturer’s safety data sheet, wearing appropriate personal protective equipment and ensuring safe roof access and fall protection.

Order Karnak 407 EPDM & SPF Acrylic Base Coat in 5-gallon pails to restore and extend your EPDM or SPF roof.