Strengthening & Fortifying Hair Products

506 products

Rebuild 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.
Patented Bond Repair
Clinical Strength
Safe for Colour-Treated
Authorized Seller
Sulfate-Free Options
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Stylist-built · coordinated step by step

Your complete routine, already thought through.

Products selected to work together.

Joico

Joico Defy Damage Protective Routine

Joico's bond-building system for hair under chemical and heat stress. Every step carries Joico's SmartRelease liposome technology, delivering rosehip oil, arginine and keratin i...

Joico - Defy Damage - Champú Protector Cleanse $16.76 Joico - Defy Damage - Acondicionador protector Condition $16.20 Joico - Defy Damage - Mascarilla Protectora Treat $17.33 Joico - Defy Damage - Escudo protector | 100 ml | Finish $17.33
Cleanse·Condition·Treat·Finish
$67.62for the full routine
Save 7%

Goldwell

Goldwell Color Brilliance Routine

Formulated to address dryness, damage and dullness. Powered by Goldwell's Dualsenses instant-care technology. This 4-step routine gives you a complete, professional-grade regime...

Goldwell - Dualsenses - Champú Color Brilliance |300ml| Cleanse $16.79 Goldwell - Dualsenses - Acondicionador Color Brilliance |300ml| Condition $12.59 Goldwell - Dualsenses - Tratamiento Color Brilliance 60 Sec |200ml| Treat $13.99 Goldwell Dualsenses Color Brilliance Serum Spray 150ml – Colour Care Finish $13.99
Cleanse·Condition·Treat·Finish
$57.36$53.34
Save 7%

Medavita

Medavita Huile d'Étoile Oil Ritual Routine

Medavita's oil ritual, built on an antioxidant complex of sacha inchi, moringa, sweet cyperus and linseed. It cleanses in balance rather than stripping, then layers nourishment ...

Medavita Huile d'Étoile Captivating Oils Shampoo – Antioxidant Oil Complex Cleanse Cleanse $7.69 Medavita Huile d'Étoile Leave-In Detangling Conditioner – All-In-One Daily Care 150 ml Condition $23.09 Medavita Huile d'Étoile Star Shining Oils Hair Mask – Ultra-Detangling Nourishing Mask Treat $51.00 Medavita Huile d'Étoile Sheen Oil Intensive Care – Salon Immersion Oil Bath 750 ml Finish $79.79
Cleanse·Condition·Treat·Finish
$161.57$150.26
Save 8%

Professional By Fama

Professional By Fama Wondher Detox Routine

Formulated to address color fade and damage. Powered by Professional by Fama's colour-enhancing technology. This 4-step routine gives you a complete, professional-grade regimen ...

Professional By Fama Wondher Detox Nutri-Chelating Shampoo – Removes Mineral Buildup 1L Cleanse $41.88 Professional By Fama Wondher Detox Soothing Treatment – Post-Detox Scalp Care 200 ml Condition $27.69 Professional By Fama Wondher Detox Hydra Peeling Mask – Exfoliating Scalp and Hair Mask 500 ml Treat $37.98 Professional By Fama Wondher Detox Instant Shield Spray – Leave-In Environmental Protection 200 ml Style $23.75
Cleanse·Condition·Treat·Style
$131.30$120.80

Understanding what your hair is going through

Breakage, explained.

When pieces keep appearing on your clothes or your ends never seem to gain length, it can feel as though your hair has stopped cooperating. Breakage is not a personal failure; it is a sign that the fibre is carrying more stress than its structure can comfortably absorb.

The technical view

What is happening inside the hair

Breakage is a physical fracture along the hair shaft, not the same process as shedding from the root. Repeated heat, bleaching, friction and tight styling can wear away the cuticle and weaken the keratin-rich cortex underneath. Once stress concentrates in a fragile area, the strand splits or snaps.

Cuticle wear accumulates Cortex carries more stress Strand splits or snaps

Ingredient intelligence

The families that support this concern

These ingredient families explain the strategy. Exact ingredients and concentrations vary by formula and size, so always check the product label.

01

Hydrolyzed proteins and amino acids

Temporary reinforcement

Small protein fragments and amino acids can form a supportive film and improve the feel of porous areas. They do not make damaged hair biologically new, but they can improve resilience and handling.

02

Conditioning polymers

Friction reduction

Cationic polymers and conditioners reduce the force needed to comb and style. Less friction means fewer opportunities for a weakened strand to fail.

03

Ceramides and emollient lipids

Cuticle support

Lipid-rich conditioners lubricate the cuticle and help reduce roughness between fibres, supporting smoother movement and more flexible ends.

Realistic results

What progress can look like

After the first wash

Smoother handling

Improved slip can make detangling gentler immediately, which matters because mechanical stress is a major source of breakage.

Over several weeks

Fewer avoidable snaps

Consistent conditioning plus lower heat and less tension can reduce new breakage, even though existing splits cannot permanently fuse.

As hair grows

Better length retention

Protecting new growth and trimming severely split ends gives retained length a better chance to become visible.

Expert note: A product can temporarily reinforce and protect damaged fibre, but no cosmetic can permanently restore a split strand to its untouched state. Technique is part of the treatment.

Professional cosmetic guidance, not a medical diagnosis. Persistent scalp symptoms, sudden shedding or patchy hair loss should be assessed by a qualified health professional.

Shop Strengthening & Fortifying Hair Products by Range

Olaplex

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.

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K18 Biomimetic Hairscience

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.

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Joico K-PAK

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.

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Redken Extreme

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.

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Schwarzkopf BC Bonacure Fibre Force

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.

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Wella Invigo Nutri-Enrich

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.

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Kenra Platinum Silkening

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.

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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.

Wella Professionals Fusion Intense Repair Shampoo — 250 ml bottle, frontWella Professionals Fusion – Intense Repair Shampoo — additional pack view 3
Wella Professionals

Wella - Fusionplex - Champú reparador intenso |8.4 oz|

$5.25
$5.25

Wella Professionals ColorMotion+ Colour Protection Shampoo — 250 ml bottle, frontWella Professionals ColorMotion+ – Colour Protection Shampoo — additional pack view 3
Wella Professionals

Wella - Champú ColorMotion+ |33.8 oz|

$5.25
$25.19
$5.25

Wella Professionals ColorMotion+ Conditioner — 200 ml bottle, frontWella Professionals ColorMotion+ – Conditioner — additional pack view 3
Wella Professionals

Wella - Acondicionador ColorMotion+ |6.7 oz|

$4.60
$4.60

Joico YouthLock Treatment Masque – Collagen Mask fJoico YouthLock Treatment Masque – Collagen Mask f
Joico

Joico YouthLock Treatment Masque – Collagen Mask for Nourished Hair, Bounce, Shine & Frizz Reduction 150ml

$17.33
$17.33
Joico YouthLock Conditioner — 250 ml collagen conditioner tube, front label, plain white backgroundJoico YouthLock Conditioner — collagen-enriched conditioner texture swatch, softens and detangles
Joico

Joico YouthLock Conditioner – Collagen Moisture + Detangling for Soft, Bouncy Mature Hair 250ml

$16.20
$16.20
Joico YouthLock Shampoo – SLS and SLES Free CleansJoico YouthLock Shampoo – SLS and SLES Free Cleans
Joico

Joico YouthLock Shampoo – Sulfate-Free Collagen Cleanse for Shine and Reduced Breakage 300ml

$16.20
$16.20
Joico - Moisture Recovery - Conditioner - 250ml - by Joico |ProCare Outlet|Joico - Moisture Recovery - Conditioner - 1L - by Joico |ProCare Outlet|
Joico

Joico - Recuperación de la humedad - Acondicionador

$13.87
$13.87

L'Oréal Pro Longer Intensive Repair Duo for Strengthening & Nourishment | L’Oréal Professionnel | ProHair.caL'Oréal Pro Longer Intensive Repair Duo for Strengthening & Nourishment | L’Oréal Professionnel | ProHair.ca
L'Oréal Professionnel

L'Oréal Professionnel Pro Longer Intensive Repair Duo – Rinse Treatment 400 ml & Mask 250 ml

$31.49
$31.49
L'Oréal Pro Longer Complete Regimen + Booster for Fuller, Stronger Hair | L’Oréal Professionnel | ProHair.caL'Oréal Pro Longer Complete Regimen + Booster for Fuller, Stronger Hair | L’Oréal Professionnel | ProHair.ca
L'Oréal Professionnel

L'Oréal Professionnel Pro Longer Complete Regimen & Booster Set – Shampoo 300 ml, Conditioner 200 ml, Mask 250 ml & Concentrate 15 ml

$66.49
$66.49
L'Oréal Pro Longer Advanced Care Set for Thicker, Stronger Hair | L’Oréal Professionnel | ProHair.caL'Oréal Pro Longer Advanced Care Set for Thicker, Stronger Hair | L’Oréal Professionnel | ProHair.ca
L'Oréal Professionnel

L'Oréal Professionnel Pro Longer Advanced Care Set – Shampoo 300 ml, Conditioner 200 ml & Rinse Treatment 400 ml

$55.99
$55.99
L'Oréal Professionnel Serie Expert Pro Longer Conditioner for Long Hair | L’Oréal Professionnel | ProHair.caL'Oréal Professionnel Serie Expert Pro Longer Conditioner for Long Hair | L’Oréal Professionnel | ProHair.ca
L'Oréal Professionnel

L'Oréal Professionnel Pro Longer Conditioner – Lengths Renewing Care for Long Hair

$19.95
$19.95
L'Oréal Professionnel Serie Expert Pro Longer Shampoo for Thicker, Stronger Hair | L’Oréal Professionnel | ProHair.caL'Oréal Professionnel Serie Expert Pro Longer Shampoo for Thicker, Stronger Hair | L’Oréal Professionnel | ProHair.ca
L'Oréal Professionnel

L'Oréal Professionnel Pro Longer Shampoo – Lengths Renewing Cleanser for Long Hair

$6.00
$6.00
L'Oréal Pro Longer Trio for Strengthening Long Hair with Fragile Ends | L’Oréal Professionnel | ProHair.caL'Oréal Pro Longer Trio for Strengthening Long Hair with Fragile Ends | L’Oréal Professionnel | ProHair.ca
L'Oréal Professionnel

L'Oréal Professionnel Pro Longer Trio Set – Shampoo 300 ml, Conditioner 200 ml & Mask 250 ml Renewal Routine

$64.58
$64.58
L'Oréal Professionnel Serie Expert Pro Longer Mask for Thicker, Stronger Ends | L’Oréal Professionnel | ProHair.caL'Oréal Professionnel Serie Expert Pro Longer Mask for Thicker, Stronger Ends | L’Oréal Professionnel | ProHair.ca
L'Oréal Professionnel

L'Oréal Professionnel Pro Longer Mask – Intensive Renewal for Thicker Stronger Ends

$24.68
$24.68
Aluram Finishing SprayAluram Finishing Spray
Aluram

Aluram Finishing Spray – Flexible Hold 296ml

$18.19
$18.19
Aluram Finishing Spray High HoldAluram Finishing Spray High Hold
Aluram

Aluram Finishing Spray High Hold – Strong Control 284g

$18.19
$18.19
Aluram Purple ShampooAluram Purple Shampoo
Aluram

Aluram Purple Shampoo – Blonde Toning Cleanse

$4.89
$16.79
$4.89
Aluram Moisture ConditionerAluram Moisture Conditioner
Aluram

Aluram Moisture Conditioner – Deep Hydration

$4.89
$16.79
$4.89
Aluram Daily ConditionerAluram Daily Conditioner
Aluram

Aluram Daily Conditioner – All-Over Hydration

$4.89
$16.79
$4.89
Goldwell Dualsenses Bond Pro Fortifying Conditioner – Bond Strengthening for Fragile Hair – product on white backgroundGoldwell Dualsenses Bond Pro Fortifying Conditioner – Bond Strengthening for Fragile Hair – official Goldwell supporting image
Goldwell

Goldwell Dualsenses Bond Pro Fortifying Conditioner – Bond Strengthening for Fragile Hair

$12.59
$19.60
$12.59
Goldwell Dualsenses Rich Repair Restoring Shampoo – Repair for Damaged, Dry Hair – product on white backgroundGoldwell Dualsenses Rich Repair Restoring Shampoo
Goldwell

Goldwell - Dualsenses - Champú Restaurador Rich Repair |300ml|

$11.89
$18.20
$11.89

Medavita Elisièr Instant Bond Repair ConditionerMedavita Elisièr Instant Bond Repair Conditioner 50 ml
Medavita

Medavita Elisièr Instant Bond Repair Conditioner – Bond Rebuilding Care for Damaged Hair 200 ml

$50.39
$62.97
$50.39
Medavita Elisièr Instant Bond Repair ShampooMedavita Elisièr Instant Bond Repair Shampoo
Medavita

Medavita Elisièr Instant Bond Repair Shampoo – Bond Rebuilding Cleanser for Damaged Hair 250 ml

$40.59
$50.05
$40.59
Goldwell Dualsenses Rich Repair Treatment 200ml – Fast Deep Care – product on white backgroundGoldwell - Dualsenses - Rich Repair 60 Sec Treatment |200ml| - by Goldwell |ProCare Outlet|
Goldwell

Goldwell - Dualsenses - Tratamiento Rich Repair 60 Sec |200ml|

$13.99
$21.35
$13.99

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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 $120 across North America.
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