Eternaprime is a purpose-built surface preparation primer designed to maximize the adhesion of EternaBond tapes by readying challenging substrates for bonding. This flexible prep primer can be sprayed, rolled, or brushed onto the surface, giving you practical, on-site options to suit the job.

• Targeted use cases: ideal for dirty, hard-to-clean surfaces (tar and gravel), potentially loose surfaces (mortar), and porous substrates (wood or concrete). It’s specifically formulated to prepare surfaces for the application of all EternaBond tapes.
• Cold-weather readiness: the primer is recommended for applications where EternaBond tape is installed at ambient temperatures below 40°F, helping maintain a reliable bond in cooler conditions.
• Contaminant-tolerant prep: when surfaces carry oil, grease, or other contaminants, Eternaprime supports a thorough pre-cleaning process to establish a solid base for adhesion (paired with EternaClean or a non-residue cleaner).

Surface preparation guidelines

• Ensure the surface is completely dry before applying Eternaprime.
• Remove heavy accumulations of loose rust and scale, plus dust, talc, and dirt to reduce impediments to adhesion.
• Oil, grease, and other contaminants should be removed with EternaClean or a non-residue cleaner prior to priming.
• Do not apply Eternaprime on PVC roofs, as reactivation of some plasticizers may occur.

How to apply

• Eternaprime can be sprayed, rolled, or brushed onto the surface. Stir frequently to maintain a consistent coating.
• After priming, proceed with the installation of the appropriate EternaBond tape according to its guidelines.

Who benefits

• Professional contractors, roofers, and DIY enthusiasts tackling tar, gravel, wood, concrete, or mortar surfaces.
• Projects requiring reliable adhesion for EternaBond tapes in cooler environments or on challenging substrates.

With Eternaprime, you’re not just priming a surface—you’re setting up a durable, lasting seal for EternaBond tapes. By addressing stubborn contaminants, porous substrates, and cold-weather installation challenges, Eternaprime helps you achieve a dependable bond and a smoother, longer-lasting installation.