Strengthening & Fortifying Hair Products
421 productsRebuild Broken Bonds — Stronger Hair from the Inside Out
Hair strength isn't just about how it looks — it's about the integrity of every protein bond running through each strand. Bleaching, colouring, heat styling, brushing, and even washing create micro-fractures in the hair's cortex, breaking disulfide bonds that hold the hair's internal structure together. Once enough bonds break, you get the hallmark signs: snapping, excessive shedding, dry brittle texture, and hair that won't grow past a certain length.
Strengthening and fortifying products work in two distinct ways. Protein treatments (like keratin, hydrolyzed wheat protein, and rice protein) coat or penetrate the hair shaft to temporarily fill gaps in the cuticle, adding structure and reducing breakage. Bond-repair technology — pioneered by Olaplex's bis-aminopropyl diglycol dimaleate and now advanced by K18's biomimetic peptide — actually reconnects broken disulfide and polypeptide chains within the cortex, restoring the hair's original strength from within rather than just masking damage.
ProHair.ca carries the most complete selection of strengthening hair care, including Olaplex, K18, Joico K-PAK, Redken Extreme, Schwarzkopf Bonacure Fibre Force, and more. Whether your hair needs emergency bond repair or steady daily fortification, we have the right system — in salon sizes and retail — sourced from authorized distributors.
Strengthening and fortifying products work in two distinct ways. Protein treatments (like keratin, hydrolyzed wheat protein, and rice protein) coat or penetrate the hair shaft to temporarily fill gaps in the cuticle, adding structure and reducing breakage. Bond-repair technology — pioneered by Olaplex's bis-aminopropyl diglycol dimaleate and now advanced by K18's biomimetic peptide — actually reconnects broken disulfide and polypeptide chains within the cortex, restoring the hair's original strength from within rather than just masking damage.
ProHair.ca carries the most complete selection of strengthening hair care, including Olaplex, K18, Joico K-PAK, Redken Extreme, Schwarzkopf Bonacure Fibre Force, and more. Whether your hair needs emergency bond repair or steady daily fortification, we have the right system — in salon sizes and retail — sourced from authorized distributors.
Patented Bond Repair
Clinical Strength
Safe for Colour-Treated
Authorized Seller
Sulfate-Free Options
Shop Strengthening & Fortifying Hair Products by Range
Olaplex
The original bond-repair technology. No. 3 Hair Perfector is an at-home maintenance treatment; No. 4 & 5 are the daily shampoo and conditioner that continue bond repair every wash.
Shop Now
K18 Biomimetic Hairscience
K18Peptide™ is the first ingredient proven to reconnect polypeptide chains — the deepest level of hair damage. The Leave-In Molecular Repair Mask works in 4 minutes and doesn't wash out.
Shop Now
Joico K-PAK
A complete reconstruction system built on hydrolyzed keratin and silk. Penetrates the cortex to rebuild from within. Ideal for hair that has lost elasticity and snaps on stretching.
Shop Now
Redken Extreme
RCT Protein Complex® reinforces the Root, Cortex, and Tip of each strand for whole-strand strength. The Extreme range includes shampoo, conditioner, mask, and a legendary leave-in treatment.
Shop Now
Schwarzkopf BC Bonacure Fibre Force
Amino Cell Rebuild Technology™ uses targeted amino acids to reconstruct the hair's internal structure. Particularly effective for chemically bleached or highlighted hair.
Shop Now
Wella Invigo Nutri-Enrich
Goji berry and omega fatty acids (3, 6 & 9) fortify and nourish dry, weakened hair. A gentler strengthening option for hair that isn't severely damaged but needs daily care.
Shop Now
Kenra Platinum Silkening
Ceramides and silk proteins smooth the cuticle and rebuild the hair's moisture-protein balance, reducing brittleness and improving elasticity over consistent use.
Shop Now
Proveedor:
Alcove
Alcove - ACTIVADOR DE RIZOS
- Precio regular
- $7.59
- Precio regular
-
$8.35 - Precio de venta
- $7.59
- Precio unitario
- por
Proveedor:
BLONDME
Schwarzkopf - BlondMe - Revelador Premium |1L|
- Precio regular
- $9.99
- Precio regular
-
$13.80 - Precio de venta
- $9.99
- Precio unitario
- por
Proveedor:
Joico
Joico - Color Intensity - Color de cabello semipermanente 4 oz
- Precio regular
- $5.99
- Precio regular
-
$27.99 - Precio de venta
- $5.99
- Precio unitario
- por
Proveedor:
KMS
KMS - Reparación húmeda - Crema revitalizante |4.2oz|
- Precio regular
- $17.99
- Precio regular
-
$21.99 - Precio de venta
- $17.99
- Precio unitario
- por
Proveedor:
Joico
Joico - JoiFull Set Champú y Acondicionador Volumizante Dúo 1L
- Precio regular
- $32.99
- Precio regular
-
$42.99 - Precio de venta
- $32.99
- Precio unitario
- por
Proveedor:
Oligo Professionnel
Oligo - Calura - Bálsamo para Rizos | 250ML
- Precio regular
- $22.00
- Precio regular
-
$28.00 - Precio de venta
- $22.00
- Precio unitario
- por
Proveedor:
Oligo Professionnel
Oligo - Calura - Champú Limpiador Moisture Balance
- Precio regular
- $22.80
- Precio regular
-
$68.00 - Precio de venta
- $22.80
- Precio unitario
- por
Proveedor:
Pureology
Pureology - Strength Cure - Dúo de champú y acondicionador |33.8 oz|
- Precio regular
- $139.99
- Precio regular
-
- Precio de venta
- $139.99
- Precio unitario
- por
Proveedor:
Moroccanoil
Moroccanoil - Acondicionador Hidratante Reparador
- Precio regular
- $13.00
- Precio regular
-
- Precio de venta
- $13.00
- Precio unitario
- por
Proveedor:
Moroccanoil
Moroccanoil - Champú Volumen Extra (para Cabello Fino)
- Precio regular
- $28.00
- Precio regular
-
- Precio de venta
- $28.00
- Precio unitario
- por
Proveedor:
Matrix
Matrix OptiSmooth Normal Smoothing System
- Precio regular
- $48.99
- Precio regular
-
$49.99 - Precio de venta
- $48.99
- Precio unitario
- por
Proveedor:
Joico
Joico - K-pak Color Therapy - Tratamiento reparador y brillo instantáneo Lustre Lock
- Precio regular
- $29.99
- Precio regular
-
$39.99 - Precio de venta
- $29.99
- Precio unitario
- por
Proveedor:
Oligo Professionnel
Oligo - Calura - Volumen de la bomba de polvo | 9g
- Precio regular
- $19.99
- Precio regular
-
$24.00 - Precio de venta
- $19.99
- Precio unitario
- por
Proveedor:
Joico
Joico - Defy Damage - Dúo Champú y Acondicionador Protector 1L
- Precio regular
- $32.99
- Precio regular
-
$42.99 - Precio de venta
- $32.99
- Precio unitario
- por
Proveedor:
Amika
Amika - The Kure - Acondicionador reparador |33.8oz|
- Precio regular
- $40.00
- Precio regular
-
$84.00 - Precio de venta
- $40.00
- Precio unitario
- por
Proveedor:
Redken
Redken - Extreme Length - Primer Tratamiento con aclarado |150ml |
- Precio regular
- $22.59
- Precio regular
-
- Precio de venta
- $22.59
- Precio unitario
- por
Proveedor:
Oligo Professionnel
Oligo - Calura - Acondicionador Hidratante Equilibrante
- Precio regular
- $26.99
- Precio regular
-
- Precio de venta
- $26.99
- Precio unitario
- por
Proveedor:
Pureology
Pureology - Pure Volume - Dúo de champú y acondicionador |33.8 oz|
- Precio regular
- $124.99
- Precio regular
-
$134.00 - Precio de venta
- $124.99
- Precio unitario
- por
Proveedor:
Pureology
Pureology - Nanoworks Gold - Dúo de champú y acondicionador |33.8 oz|
- Precio regular
- $91.99
- Precio regular
-
$106.99 - Precio de venta
- $91.99
- Precio unitario
- por
Proveedor:
Oligo Professionnel
Oligo - Blacklight - Champú Azul Fórmula Profesional | 1L
- Precio regular
- $68.99
- Precio regular
-
- Precio de venta
- $68.99
- Precio unitario
- por
Proveedor:
Moroccanoil
Moroccanoil - Acondicionador potenciador de rizos para todo tipo de rizos
- Precio regular
- $30.00
- Precio regular
-
- Precio de venta
- $30.00
- Precio unitario
- por
Proveedor:
Medavita
B Refibre - Reconstructive Hair Mask 150ml
- Precio regular
- $31.99
- Precio regular
-
$41.99 - Precio de venta
- $31.99
- Precio unitario
- por
Proveedor:
Moroccanoil
Moroccanoil - Acondicionador Suavizante
- Precio regular
- $14.00
- Precio regular
-
- Precio de venta
- $14.00
- Precio unitario
- por
Proveedor:
Moroccanoil
Moroccanoil - Champú Realzador De Rizos
- Precio regular
- $30.00
- Precio regular
-
- Precio de venta
- $30.00
- Precio unitario
- por
Which Strengthening & Fortifying Hair Products Products Are Right for You?
Bond Repair Treatments
Scientifically advanced formulas (Olaplex, K18) that reconnect broken disulfide and polypeptide bonds deep inside the cortex. The most powerful repair available without a salon visit.
Protein Treatments
Hydrolyzed keratin, silk, and wheat protein formulas that fill cuticle gaps and add temporary structural support. Best for hair that is limp, overly elastic, or prone to breakage.
Strengthening Shampoos
Daily-use cleansers that build fortification into every wash. Won't replace a treatment, but maintain and extend the results of your protein or bond-repair routine.
Fortifying Conditioners
Rinse-out conditioners with structural proteins and ceramides that add slip and strength simultaneously — reducing breakage during detangling and brushing.
Leave-In Strengtheners
Heat-activated or ambient-working leave-in treatments (like K18) that continue to repair bonds after application, every time you style or wash.
Deep Repair Masks
Intensive weekly treatments with concentrated protein and bond-building actives. Used 1–2 times per week on damaged or chemically processed hair.
Frequently Asked Questions
What's the difference between bond repair (Olaplex, K18) and protein treatments?
Protein treatments (keratin, hydrolyzed wheat/silk protein) fill in the gaps in the hair's outer cuticle layer, adding surface strength and reducing porosity. Bond repair technology (Olaplex's bis-aminopropyl diglycol dimaleate, K18's biomimetic peptide) works inside the cortex to actually reconnect broken disulfide bonds and polypeptide chains — the hair's fundamental structural connections. Bond repair produces deeper, more lasting results; protein treatments are a useful complement for surface conditioning and elasticity.
How often should I use Olaplex No. 3?
Olaplex recommends using No. 3 Hair Perfector at least once a week on healthy hair, and 2–3 times per week on severely damaged, bleached, or brittle hair. Apply to damp hair, leave for 10+ minutes (overnight works well for very damaged hair), then shampoo and condition as normal. Consistent weekly use is more effective than infrequent intensive use.
My hair is protein-sensitive — will strengthening products make it worse?
Some hair (often fine, low-porosity, or already protein-overloaded hair) reacts badly to heavy protein treatments — becoming stiff, rough, or more brittle. If you're protein-sensitive, avoid products with hydrolyzed keratin or wheat protein as the first or second ingredient. Bond repair formulas (Olaplex, K18) are generally better tolerated because they use small bond-building molecules rather than large protein films. Biolage Fiberstrong (bamboo extract) is also a gentler option.
Can I use K18 and Olaplex in the same routine?
Yes, and many stylists recommend it. They work on different mechanisms: Olaplex reconnects disulfide bonds; K18 reconnects polypeptide chains. Using both covers more of the damage spectrum. A common approach: use Olaplex No. 3 as your pre-wash treatment once a week, and apply K18 Leave-In after your Olaplex shampoo and conditioner wash.
How long does it take to see results from a strengthening routine?
With bond repair treatments like Olaplex or K18, many people notice reduced breakage and improved elasticity after 2–3 applications. Full restoration of severely damaged hair takes 4–8 weeks of consistent use. Protein treatments show results more immediately but are temporary — they wash out over time. For the longest-lasting results, use bond repair as the base and protein treatments as a complement.
Is Redken Extreme good for bleached hair?
Yes. Redken Extreme's RCT Protein Complex is well-suited for bleached and colour-processed hair. However, for severely compromised bleached hair (hair that has turned mushy, extremely porous, or is snapping at the root), Olaplex or K18 should be the priority treatment, with Extreme used as the daily maintenance shampoo and conditioner.
Are salon sizes of Olaplex or K18 worth buying?
If you use these products consistently — which you should to see results — salon sizes are significantly more economical. Olaplex No. 3 in 250ml costs considerably less per ml than the 100ml retail size. On ProHair.ca, we stock both retail and salon sizes across the Olaplex and K18 lines at the same authorized prices your salon pays.
Why Buy From ProHair?
ProHair.ca is an authorized seller of Olaplex, K18, Joico, Redken, Schwarzkopf, Wella, and Kenra — sourced directly through official authorized distributors. Every strengthening product we sell is 100% authentic, properly stored, and backed by the brand's quality guarantee. We've been trusted by hair professionals and home users since 1996. Free shipping on orders over $99.99 across North America.
