Paint Mediums & Additives

Select based on substrate and desired effect: use bonding or countertop-specific additives for high-wear surfaces, flow improvers and retarders for smoother brush or spray application, and texture or gloss modifiers for decorative finishes; check compatibility with your base paint (water- or solvent-based) and follow manufacturer instructions for mix ratios

Prices vary by type and brand; expect budget options under $20 for simple extenders or thinners and specialty products such as countertop resins or high-performance additives commonly ranging from $25 to $150, with an average product price in many assortments near $60–$70

Many water-based additives have low odor and lower VOCs, but solvent-based products and epoxy resins require good ventilation, gloves, and eye protection; always read the safety data sheet for recommended PPE and curing times before use

Check the additive label or technical datasheet for stated compatibility (waterborne vs solvent-borne, acrylic, latex, oil), run a small test mix and application on a sample surface, and observe adhesion, drying time, and finish before full-scale use

Follow manufacturer-recommended mix ratios; many additives are used at small percentages (often 1–10% by volume) and exceeding recommended amounts can alter film formation, drying, or durability, so test any adjustments on a sample area

Yes — additives like hardeners, UV stabilizers, or bonding agents can improve durability and resistance to wear, while extenders or retarders may affect hardness and cure time; use products intended for the application and consult care instructions for cured surfaces

Combining additives is possible but increases risk of incompatibility; only mix products that list mutual compatibility, adhere to each product's dosage limits, and perform a small-scale test to ensure acceptable drying, finish, and performance