Solvent-Free Epoxy Primer Systems

Precision-Critical Grouting. Tailored by a Real Manufacturer.

Solvent-Free Epoxy Primer

No matter how advanced your grout, patch, or coating system is—it’s only as good as the surface it sticks to.

ZDSpoxy’s Solvent-Free Epoxy Primers are engineered to bond to challenging substrates: damp concrete, oil-exposed floors, old substrates, and poorly profiled surfaces. These primers improve adhesion, seal pores, suppress bubbles, and provide a chemically-compatible base layer for subsequent grouting, coating, or repair.

Why Primer Is Not Optional

Problem	Without Primer	ZDSpoxy Solution
Damp or saturated concrete	Weak bond or delamination	ZDS2870AB wet-tolerant primer
Oil-contaminated surface	Repels epoxy or causes fisheyes	ZDS2870AB penetrates & anchors into pores
Dusty or unprofiled substrate	No grip, peeling after cure	Improves substrate wet-out & bond area
Bubbles or voids in overlay grout	Air escape from concrete	Pore sealing before pour/coating

✅ Compatible with ZDSpoxy grouts, injections, patch mortars, and coatings
✅ Solvent-free = safe for food areas, closed spaces, marine jobs
✅ Fast-curing, deep-penetrating epoxy basecoat

Where to Use ZDSpoxy Primers

Wet or partially cured concrete (e.g. early-age slabs)
Oil-contaminated concrete in factories/garages
Cold-weather sites with condensation
Substrates before epoxy grout pours
Primer under epoxy coatings / repair mortars
Vertical or overhead patch prep
Seawall, port, or tidal zone structures
Food-grade and confined areas (low odor, 0 VOC)

Recommended Product: ZDS2870AB

Property	Performance
Adhesion to wet concrete	>2.5 MPa pull-off strength
Cure conditions	5°C–35°C, surface moisture ≤95% RH
VOC content	0 g/L (solvent-free, non-flammable)
Packaging	2-part system, 1:1 ratio
Compatible with	All ZDSpoxy grouts, repair systems, coatings
Coverage	~0.25–0.35 kg/m² depending on surface profile

Application Tips

Surface should be clean, no standing water
Apply by roller, brush, or airless spray
Wait until tack-free (~4–8 hours) before applying overlay
Do not allow primer to puddle in low spots
Avoid mixing more than needed (pot life ~30 mins at 25°C)
Can be reactivated with light sanding after 24h cure

Real-World Project Example

A port maintenance team used ZDS2870AB as a primer before applying ZDS1417AB underwater epoxy grout to wet dock slab edges during tidal repair.
No delamination was reported after 9 months of saltwater exposure and tidal wetting cycles.

In another job, ZDS2870AB was used under ZDS400-4 topcoat on a warehouse slab with old oil stains—achieved >2.8MPa pull-off adhesion.

Don't let the surface ruin your system.

ZDSpoxy primers help you bond with confidence—even when the concrete says “no.”