Peter Thomas Roth Instant FIRMx Glow-Filter Priming Serum, Illuminating & Firming — Lightweight Contouring Radiance

Peter Thomas Roth Instant FIRMx Glow-Filter Priming Serum is a lightweight illuminating primer-serum that visibly brightens, blurs and helps refine the look of facial contours while preparing skin for makeup or a natural glow look.

This hybrid serum-primer layers hydration and soft radiance with light-reflecting minerals and diamond powder while a 5% Actigym Clinical Contouring Technology ingredient works over time to help tighten the appearance of the jawline, chin and cheek definition. The formula smooths texture, reduces the appearance of imperfections and creates a luminous base that blends easily across all skin tones. Use it alone for a dewy, filtered finish or beneath foundation to extend wear and boost luminosity.

How does this product create an instant glow?

Illuminating Minerals and Diamond Powder deliver immediate light diffusion to make skin look brighter and more even. These reflective particles sit on the skin’s surface to catch light, minimizing the look of shadows and dullness without heavy shimmer.

• Contains finely milled illuminating minerals and diamond powder for soft radiance.
• Creates a subtle, light-reflective veil that blurs the look of imperfections.
• Applies smoothly and blends across skin for an even, natural-looking glow.

What does the 5% Actigym ingredient do over time?

The 5% Actigym Clinical Contouring Technology is a fermented marine-derived ingredient designed to help refine facial contours with daily use. Over continuous application it supports a firmer-looking jawline and more defined cheeks and chin, delivering gradual visual sculpting instead of an immediate tightening sensation.

• Formulated at 5% concentration for targeted contouring benefits.
• Fermented marine-derived technology aimed at improving the look of facial definition.
• Best results seen with consistent, daily application as directed.

How should I use it in my routine for best results?

Apply a small amount to clean, moisturized skin before makeup or wear solo to achieve a glow-filtered finish. Tap or smooth the serum evenly over cheeks, chin and jawline; allow it to settle briefly before layering foundation or tinted products.

• Use morning and evening for topical benefits and prep before makeup.
• Blend a pea-sized amount across problem areas for targeted luminosity and sculpting.
• Pairs well under foundation or worn alone for lighter coverage and radiance.

Will it work on my skin tone and type?

The formula is designed to blend onto a wide range of skin tones and types, adding brightness without leaving an obvious cast. Its lightweight texture suits normal, dry, combination and some oily skin types, though those with very oily complexions may prefer to use it sparingly or mix with a mattifying primer.

• Blends uniformly across fair to deep complexions without visible residue.
• Hydrating yet lightweight texture works under makeup and for makeup-free days.
• Adjust quantity based on skin type—less for oilier skin, more for dehydrated skin.

Who is this for: The Peter Thomas Roth Instant FIRMx Glow-Filter Priming Serum is ideal for anyone who wants an immediately luminous, blurred finish while supporting the appearance of facial contouring over time. It's a good fit for users seeking a multi-tasking product that preps skin for makeup, enhances natural radiance, and provides visible contouring benefits with regular use. Avoid if you prefer fragrance-free or extremely mattifying primers; consult the ingredient list if you have specific sensitivities.

Ingredients

Water/Aqua/Eau, Glycerin, Butylene Glycol, Isononyl Isononanoate, Citrus Aurantium Bergamia (Bergamot) Fruit Water, Dimethicone, Butyrospermum Parkii (Shea) Butter, Caprylic/Capric Triglyceride, Glyceryl Stearate, Polyglyceryl-6 Distearate, Cetearyl Alcohol, Sorbitan Stearate, Isostearyl Alcohol, Mica, Butylene Glycol Cocoate, Bacillus/Soybean Ferment Extract, Diamond Powder, Niacinamide, Sodium Hyaluronate, Sodium Hydroxide, Citric Acid, Glutamic Acid, Glycine, Histidine, Isoleucine, Leucine, Lysine, Phenylalanine, Alanine, Arginine, Proline, Serine, Threonine, Tyrosine, Valine, Sodium Phytate, Sodium Lactate, Silica, Ethylcellulose, Potassium Sorbate, Sodium Benzoate, Hydroxyethylcellulose, Aspartic Acid, Disodium Phosphate, Polysorbate 60, Sodium Phosphate, Polysilicone-11, Titanium Dioxide, Ethylhexylglycerin, Dimethicone Crosspolymer, Carbomer, Polymethylsilsesquioxane, Iron Oxides/CI 77491, Phenoxyethanol.