Primer
Pr305 Single-Ply Primer
A plasticizer-free, single-component, water-based acrylic primer for brush, roller or spray. It blocks plasticizer migration from PVC membranes — the cause of discoloration and early failure in coating systems — bonds to aged single-ply, and leaves a breathable film that lets trapped moisture escape under SESCO silicone or acrylic topcoats. 0.5 gal per 100 ft² on aged TPO, 1 gal per 100 ft² on PVC.
- Packaging
- 5 gal pail
- Color
- Clear, ivory, black
Compatible substrates
Pr305 is specified in one roof system — open one for the full build-up.
| VOC | < 50 g/L |
|---|---|
| Solids by volume | 45 % ± 2 |
| Solids by weight | 50 % ± 2 |
| Density | 8.8 lb/gal |
| Viscosity | 300 ± 100 cps |
| Tensile strength | 75 ± 10 psi |
| Elongation | 1,750 % ± 10 % |
| Yield (1 gal / 100 ft²) | 7.5 dry mils |
| Dry time @ 75 °F, 50 % RH | 45 minutes |
| Recoat window | More than 6 hours |
| Complete cure | 30 days |
| Coverage | TPO 0.5 gal / 100 ft² · PVC 1 gal / 100 ft² |
| Shelf life | 24 months, unopened |
Need a spec letter for this system?
Our reps write them for building owners and architects.